ASTM A519 Grade 4140 Tubes Manufacturer & Supplier

If you’re looking for tubing that will exceed your expectations especially when faced with intense stress, heavy loads, or challenging environments, then you’ve found the right place. Corten Steel Tube is your premier, globally trusted partner for quality ASTM A519 Grade 4140 Tubes. We’re talking about high-performance AISI 4140 seamless tubes to meet high standards complete with the ruggedness to take on the toughest jobs. Depending on whether your project is powering the oil & gas sector, building the backbone of heavy machinery, innovating in automotive engineering, or ensuring reliability in power generation, these tubes are designed to perform under load, with strength, exceptional toughness, and wear resistance that keeps your operations running smoothly and efficiently.

It’s time to forget about faculty tubing that might bend under pressure, wearout to soon or fail when you need it the most. Our ASTM A519 Grade 4140 Tubes are built from a tradition of quality and precision, that will last and excel even under significant high-stress conditions, immense pressures, and wide-ranging operational temperatures. Let’s take a closer look at why these amazing tubes are always the first choice for qualified engineers or project managers who refuse to compromise on quality and performance.

What is ASTM A519 Grade 4140 Tubing?

Alright, let’s get down to figure out why this tubing is special or not. ASTM A519 is a significant specification by the American Society for Testing and Materials and establishes a standard for seamless mechanical tubing made from carbon steels and alloy steels. This specification guarantees you are purchasing tubing for mechanical applications that meets the requirements.

Now, when we inspect ASTM A519 Grade 4140, we are truly investing in an alloy steel champion This isn’t just any steel it’s low alloy steel which means it’s about only small amount of alloying elements that are all carefully controlled with the total amount of alloying elements to achieve it’s amazing properties. In the case of Grade 4140, the alloying elements include chromium (Cr), molybdenum (Mo), and manganese (Mn). Each of these elements plays a vital role:

The “trifecta of toughness, strength and wear resistance” makes ASTM A519 Grade 4140 tubes an indispensable option for the tough mechanical and structural applications that would otherwise break down lesser materials quickly. If your application involves static or dynamic loads, high internal or external pressure, changing temperature, or you have an environment where abrasion is a factor, this is the seamless tubing you can stake your reputation on. It will deliver you consistent, trusted, and exceptional performance time and again.

ASTM A519 Grade 4140 Tubes: Comprehensive Range & Availability

At Corten Steel Tube, we understand that there is very rarely a ‘one-size-fits-all’ answer that can be used for specialized industrial applications. This is why we offer an extensive assortment of ASTM A519 Grade 4140 Tubes so that you can be certain to find the appropriate match for your project-specific applications. We pride ourselves on providing options and flexibility:

Specification	Here’s What We Provide For You and it’s Benefits
Standard	ASTM A519 – It’s not just a stamp; it’s your quality, consistency and performance assurance for seamless carbon and alloy steel mechanical tubing. By conforming to this standard, the tubes have undergone the strictest manufacturing and testing requirements.
Grade	AISI 4140 / ASTM A519 Grade 4140 – This is your high-strength, and high-toughness bell cow. The AISI (American Iron and Steel Institute) specification is still interchangeable with ASTM A519 Grade 4140, indicating the same wonderful chromium-molybdenum alloy steel.
Size Range	NPS 2” to 12” (Nominal Pipe Size) – We have a wide variety of options that will cover common industrial sizes. This is applicable for a range of types of uses, from smaller hydraulic lines to larger structural components. Looking for something out of this category? Let’s chat!
Wall Thickness	Schedules 20 – XXH, and custom options – From lighter walls for moderate pressure, to extra-extra-heavy (XXH) walls for extreme containment pressures, we can provide a solution. We can also provide a custom wall thickness to meet your design calculations and minimize material waste.
Heat Treatment	L80, P110, Q125 (as you requested) – Would you like your tubes to have mechanical characteristics similar to API oil country tubular goods (OCTG)? We can offer them in a heat-treated condition such as L80, P110, or Q125 and the processes ofizing and tempering to target yield strengths and toughness levels.
Surface Condition	“As rolled,” “normalized,” or “annealed” – Select the finish that best fits you and your next step. “As rolled” is the standard mill consistent finish. “Normalized” has a more consistent grain structure and better toughness. “Annealed” is softer and more ductile so that it is suitable for operations that need a lot of machining or cold forming.
Delivery Condition	Hot finished or cold drawn – Hot finished tubes are the economical way to go and a good choice for numerous applications. Cold drawn tubes have tighter dimensional tolerances, better surface finishing and improved mechanical properties due to work hardening, making them the preferred solution for precision applications.

We excel at being more than just a supplier, we are a solutions provider. If your project requires dimensions, heat treatments, or particular conditions not listed, we encourage you to contact us. Our product experts would be happy to find out what your needs are and how we can provide custom ASTM A519 4140 Grade Tubes just for you.

Chemical Composition of ASTM A519 4140 Tubes

The exceptional performance of ASTM A519 Grade 4140 Tubes is not a coincidence; it results from its carefully designed chemical composition. Each individual element plays an important role, as part of a collective, to produce a material with a remarkable combination of properties. Let’s look at the individual players:

Element	Content (%)	Why It Matters For Performance & It’s Benefit
Carbon (C)	0.38 – 0.43	The Foundation of Hardness: Carbon is the principal hardening element in steel. This medium carbon range (0.38-0.43%) gives Grade 4140 its strong base strength, and importantly, allows it to respond to heat treatment (like quenching and tempering) to increase strength and hardness even more. If we had too little carbon, it would be too soft; too much and it could be too brittle. This range is ideal for a good balance.
Manganese (Mn)	0.75 – 1.00	Manganese is an important alloying element that contributes strength and hardness, increases the steel’s heat treatment response and toughness, especially at low temperature. It is also a deoxidizer and desulfurizer during the steelmaking process to help remove impurities during the steel production, leading to cleaner steel with more dependable properties and improved hot working properties.*
Chromium (Cr)	0.80 – 1.10	The Hardenability & Wear Resistance Hero: Chromium is a superstar in Grade 4140. Its main function is to greatly enhance the steel’s hardenability, which is the ability to attain high hardness deep into its cross-section during quenching – resulting in better through-hardness and strength. Chromium also creates hard carbides, which greatly enhances wear resistance and abrasion resistance. It also gives a modest improvement in corrosion resistance.*
Molybdenum (Mo)	0.15 – 0.25	The Toughness & High-Temp Strength Enhancer: Molybdenum is another important alloying element with a number of very specific benefits. It greatly increases the toughness of the steel and, in particular, its resistance to temper embrittlement (the ability to brittle the steel with specific heat treatments). Molybdenum also increases the strength of steel at high temperatures (creep resistance) and is also very important for hardenability as it often works with chromium. Necessary for applications that see heat and high stress.*
Silicon (Si)	0.15 – 0.30	The Deoxidizer & Strength Contributor: Silicon is primarily used as a deoxidizing agent during the production of steel. Silicon removes oxygen which causes the steel to be less sound (i.e. develop porosity). Silicon is soluble in the iron matrix (ferrite), and does provide some degree of solid solution strengthening; it modestly increases the overall strength and hardness of the steel.*
Phosphorus (P)	≤ 0.035	Controlled for Toughness: Phosphorus is considered an impurity in steel. Its presence can make steels brittle (especially long-none, i.e. cold-shortened steels). Thus, phosphorus is fully controlled and its content is kept below a very low maximum permissible amount to ensure adequate toughness and ductility.*
Sulfur (S)	≤ 0.040	Controlled for Ductility & Weldability: sulfur probably continues to be a contaminant and is often a nuisance like phosphorus. It can combine with manganese to form manganese sulfides which reduce ductility and toughness (and especially transverse toughness), as well as weldability. Both contaminants are kept as low as possible with Grade 4140 in order to maintain these important properties.*
Iron (Fe)	Balance	The Basis: Iron is the major component of steel, which represents that base matrix where all alone elements either dissolve or create compounds. It represents that baseline structure, and the properties of Grade 4140 are built upon it.*

Understanding this specific “recipe” helps in understanding why AISI 4140 Seamless Tubes are suitable for applications where failure cannot be tolerated. The exact proportions of the specified elements in the formulation, and the manufacturing and heat treatment processes, make this a uniquely superior material with mechanical performance that can be relied on.

Mechanical Properties of ASTM A519 4140 Tubes

The numbers speak on their own! The mechanical characteristics of our ASTM A519 Grade 4140 Tubes speak volumes about their ability to take on demanding real-world tasks. The mechanical characteristics are usually determined after the tubes have been subjected to proper heat treatment (like normalizing or quenching and tempering) to enhance performance. Let’s take a look at what these values mean for you and your own application:

Property	Metric Value	Imperial Value	What This Means For You – The Real-World Benefit
Tensile Strength	Min. 655 MPa	Min. 95,000 psi	This is the largest amount of stress the material can take when being extended or pulled (before necking begins or the cross-section of the specimen begins to reduce significantly) and before breaking. A high tensile strength like that shows that Grade 4140 tubes can bear tremendous pulling forces, which makes them prime for structural tension members, and containment at high pressures.
Yield Strength	Min. 415 MPa	Min. 60,200 psi	This is the stress point when the material starts to deform plastically (permanently). Prior to reaching this yield strength the material will return to its original shape if loads are removed. High yield strength is important because it describes the load the tube is able to hold before encountering permanent distortion. This is important in the design of parts that must retain their shape under operational loads.
Elongation at Break	25.7% (Typical)	25.7% (Typical)	This indicates the ductility of the material – how far it can stretch or elongate before it fractures. A good elongation percentage (e.g. 25.7%) suggests that the material is not brittle and can be deformed a good amount before failing and provides a warning before failure. This is significant for safety and also for applications with forming or bending.
Hardness (Brinell)	197 HB (Typical Annealed)	197 HB (Typical Annealed)	Hardness is the extent to which the material will withstand localized plastic deformation, like indentation or scratching. A Brinell Hardness (HB) of 197 in the annealed condition provides a reasonable machinability. Depending upon hardening heat treatments, this value can increase dramatically producing a good wear resistance. Depending on the heat treatment, the hardness can be modified for the wear and strength requirements of the application.
Elastic Modulus (Young’s Modulus)	190–210 GPa	27,557–30,458 ksi	This value, commonly referred to as Young’s Modulus, signifies the stiffness of the material, or the resistance to elastic deformation. A high elastic modulus implies that the material will deform less under a given load and recover to its original shape more easily. Applications where dimensional stability and rigidity are important are needed, such as precision shafts or racking structural supports.
Shear Modulus (Modulus of Rigidity)	80 GPa	11,600 ksi	Shear modulus defines the resistance of a material to shearing stress – consider the forces of twisting the driveshaft of an ATV. A good shear modulus is essential – axles, drive shafts, and torsion bars are often involved with high torsional load in operation.
Poisson’s Ratio	0.27 – 0.30	0.27 – 0.30	Poisson’s ratio describes a property in which a material will tend to contract (or expand) in the perpendicular directions to its stretch (or compression). The Poisson’s ratio is a very important parameter in complex stress analysis and design, especially with multi-axial loading conditions.

These strong mechanical properties mean that when you choose ASTM A519 Mechanical Tubes in Grade 4140 from Corten Steel Tube, you are getting a material engineered to perform reliably in the most demanding mechanical stress conditions. This will ultimately equate to a longer life for your components, better safety, and greater overall system efficiency in your projects.

Physical & Thermal Properties: How ASTM A519 Grade 4140 Tubes Perform

In addition to simply looking at the strength value, it is also important to consider the physical and thermal properties of ASTM A519 Grade 4140 Tubes for effective design and application, particularly when there are temperature changes and/or specific characteristics of the materials involved.

Property	Metric Value	Imperial Value	Why This Is Useful To Know For Your Project
Density	7.85 g/cm³	0.284 lb/in³	Calculating the density is important because it allows us to find the weight of the components. This is important for structural design, estimating shipping costs, and for applications where the weight of a component really matters (automotive, aerospace).
Melting Point	Approx. 1416°C	Approx. 2580°F	The melting point represents the temperature at which the steel goes from a solid to liquid state. While Grade 4140 generally won’t be used at its melting point, the melting point represents an upper limit of extreme temperature exposure, and is relevant to activities such as welding (and also forging).
Thermal Conductivity (@100°C / 212°F)	42.6 W/m·K	296 BTU·in/hr·ft²·°F	Thermal conductivity indicates how efficiently the material transmits heat. A medium value like this indicates Grade 4140 has a decent ability to dissipate heat. This is important for applications where heat is generated by friction or when components are part of a heat transfer system. It also impacts how quickly the material heats up or cools when heat treatment occurs.
Coefficient of Thermal Expansion (20-100°C / 68-212°F)	12.2 µm/m·°C	6.78 µin/in·°F	This property measures how much the material expands when heated or shrinks when cooled, and it is an important parameter to consider when designing assemblies with close tolerances or when combining different materials that have different rates of expansion. If the potential expansion is not considered, it can result in added stress, distortion, or failure of the assembly.

These properties offer a more complete view of how 4140 Tubing will ultimately perform in its intended service environment. If you need to factor in weight, heat dissipation, or temperature-related dimensional changes, these values give you the confidence you need to engineer.

A519 4140 Alloy Steel Seamless Pipe and Tubes Price List In India

If you’re looking for the best price list for A519 4140 Alloy Steel seamless pipe and tubes in India, you’re in the right place. Corten Steel Tube offers affordable pricing for whatever types and sizes of A519 Grade 4140 seamless tubes and pipes you require. We can provide seamless tubing options that are different in sizes, wall thicknesses, and finishes. We offer you price based on current market prices, to ensure you are purchasing the correct alloy steel tubing with the best value. We can also provide just size of tubes in bulk quantity or in continuous cut sections. Our team offers competitive pricing, along with fast reliable delivery anywhere in India with a reasonable understanding of lead times.

Size (OD x WT)	Specification	Grade	Condition	Approx. Price (INR/Kg)
25mm x 3mm	ASTM A519	4140	Annealed/NBQ	₹155 – ₹170
38mm x 4mm	ASTM A519	4140	Normalized	₹160 – ₹175
50mm x 5mm	ASTM A519	4140	Quenched & Tempered	₹170 – ₹185
76mm x 6mm	ASTM A519	4140	As Rolled	₹165 – ₹180
89mm x 8mm	ASTM A519	4140	Heat Treated (L80/P110 equiv.)	₹175 – ₹190
101.6mm x 10mm	ASTM A519	4140	Hardened & Tempered	₹180 – ₹200
Custom Size (as per request)	ASTM A519	4140	Custom Heat Treat	On Request

Common Applications of ASTM A519 Grade 4140 Tubes

With their unbeatable combination of strength, toughness and wear resistance, ASTM A519 Grade 4140 Tubes are seeing increasing applications throughout a number of different industries for critical and high-stress applications. Let’s look at some of these in more detail to understand why this grade is so sought-after.

Oil & Gas Exploration and Production:

Drill Collars and Tool Joints: The components of the drill string are severely tortured during service in terms of torsional stress, shock, and wear. Grade 4140 was designed to give strength and wear-resistance, which is important for reliability and long-term use and life of the drill string components, in very harsh and often catastrophic downhole conditions.
Downhole Tools & Packers:Therearemanyspecializedservicesin completion and well intervention that require strongtools to perform reliably under extreme temperatures and pressures.
High-Pressure Transmission Lines:For transporting fluids and gases under significant pressure, the seamless integrity and strength of 4140 tubing isvital.

Power Generation Components:

Shafts and Axles:Grade 4140 provides the torsional strength and fatigue propertiesneededin the turbines, generators and other rotating machines.
High-Pressure Steam Lines: It is very possible that dedicated boiler tube grades such as ASTMA335 could be used to construct super-heated steam tubes; however, Grade 4140 could be usable depending on certain high pressure, moderate temperature steam applications due to its reasonable strength when operated at higher temperatures.
Fasteners and Bolts:High-strength bolts and fasteners made of 4140 are used in the critical assemblyof power plants.

Automotive and Transportation Industries:

Axles and Axle Shafts:For cars, trucks, and heavy vehicles, axles must support high torque as well as bending loads and fatigue. Grade 4140 is a highlydesirable weldable material due to its superior strength and toughness properties.
Crankshafts and Connecting Rods:Theworkdoneinenginescreates a complex pattern of cyclic load, and high fatigue strength and wear resistance are both essential qualities of these components – properties that Grade 4140 provides.
Gears and Sprockets:The heat treatability to high hardness makes 4140 grade steel ideal for gears that need to resist wear and require significant power transmission.
Suspension Components:Some high-stress suspension componentsalsoleverage the strength and toughness properties of 4140.

Mechanical Engineering & Heavy Machinery:

Shafts and Spindles:In the world of machine tools, industrial robots, and heavy equipment, 4140 grade steel exhibits the required rigidity, strength and wear resistance tomaintainaccuracy and durability.
Hydraulic Cylinders (Barrels & Rods): With their smooth surface and high yield strength, ASTM A519 Mechanical Tubes are ideal for hydraulic cylinder barrels that must withstand high fluid pressures. In just the same way, the rod material benefits from 4140’s strength and wear resistance.
Structural Components: In applications where high strength-to-weight ratio is beneficial and components are subjected to significant stress.
Couplings and Clutches: Parts that transmit torque and experience wear.

Why Choose Corten Steel Tube for ASTM A519 4140 Tubes?

When you’re sourcing critical materials like ASTM A519 Grade 4140 Tubes, you need more than just a supplier; you need a partner who understands your needs, delivers on promises, and stands by their product. At Corten Steel Tube, we’re committed to being that partner for you. Here’s what sets us apart and why engineers and project managers worldwide choose us:

Global Export Network & Massive Inventory – We Deliver Worldwide, Fast!
Both time and money are precious and overdue projects are expensive. We keep a large inventory of ASTM A519 4140 Grade Tubes in many sizes and schedules, so in many cases, we can deliver your order quickly. Adding to this process is our strong global export network and logistics experience to ensure that we get your order delivered quickly and reliably to your site, anywhere in the world.

Custom Sizes & Specifications – Your Project, Your Way!
We recognize that most standard off-the-shelf solutions might not fit. Whether it’s sharp cut tubing lengths, specific heat treatments (L80, P110, Q125 equivalents), or unique finishing, our team has the available resources to provide tailor-made solutions. We hear your requirements and will provide tubing that meets your specifications, ultimately saving you time, and your fabrication time.

Unwavering Commitment to Quality Assurance – Peace of Mind, Guaranteed!
Quality isn’t just a buzzword for us; it’s the foundation of everything we do. All our AISI 4140 Seamless Tubes undergo rigorous quality checks. This includes 100% Hydrostatic Testing to verify pressure integrity, comprehensive Non-Destructive Testing (NDT) like Ultrasonic or Eddy Current testing to detect any imperfections, and meticulous dimensional checks. Every batch comes with full Mill Test Certificates (MTCs) as per EN 10204 3.1, providing complete traceability and assurance of compliance.

Explore Related Grades & Specifications – We've Got Your Tubing Needs Covered!

While ASTM A519 Grade 4140 is a fantastic all-around performer for high-stress applications, we understand that different projects may call for different material characteristics. At Corten Steel Tube, we stock and supply a wide array of other grades and specifications to ensure we can meet your diverse tubing requirements:

Explore Other Popular ASTM A519 Grades & Related Products

ASTM A519 Tubes: Discover everything you need to know about ASTM A519 seamless mechanical tubing, including chemical properties, mechanical strength, heat treatment options, and available grades.

ASTM A519 Grade 4130: Known as “Chromoly” steel, Grade 4130 is a low-alloy steel with chromium and molybdenum, offering a great strength-to-weight ratio. It’s easy to weld and machine, making it ideal for aerospace parts, race car frames, and high-performance industrial components.

ASTM A519 Grade 1026 Tubes: This low-carbon steel grade is perfect for applications that don’t demand high strength but require good machinability and weldability. It’s a common choice for automotive components, hydraulic cylinders, and general mechanical use.

ASTM A519 Grade 1040 Tubes: A medium-carbon steel grade that provides higher strength and hardness than 1020 or 1026. Ideal for applications needing good wear resistance and moderate toughness—used in axles, shafts, and gears.

FAQ’s About ASTM A519 Grade 4140 Tubes?

We know that choosing the right material can involve a lot of questions. Here are answers to some common queries about our ASTM A519 Grade 4140 Tubes:

What is the ASTM standard for 4140 steel?

The ASTM standard for 4140 steel is ASTM A519 for seamless mechanical tubing and ASTM A29/A29M for bar stock. These standards define chemical composition, mechanical properties, and heat treatment requirements for 4140 alloy steel.

What is the ASTM A519 equivalent to?

ASTM A519 is equivalent to AISI 4130, 4140, and 1020 grades depending on the carbon and alloy content. It specifies seamless carbon and alloy steel mechanical tubing used in high-stress applications like automotive and aerospace.

What grade is 4140 pipe?

4140 pipe is a low-alloy steel grade under ASTM A519, known for its high tensile strength, toughness, and resistance to fatigue. It’s widely used for mechanical applications, oil and gas equipment, and structural components.

What is 4140 tubing?

4140 tubing is a seamless mechanical tube made from 4140 alloy steel. It offers high strength, hardness, and wear resistance, making it ideal for heavy-duty applications such as hydraulic cylinders, shafts, and machine components.

What are the disadvantages of 4140 steel?

Despite its strength, 4140 steel has some downsides: it’s less corrosion-resistant than stainless steel, harder to weld without preheating, and may require heat treatment to achieve desired mechanical properties.

What is AISI 4140 ASTM equivalent?

AISI 4140 is most commonly equivalent to ASTM A519 Grade 4140 for tubing and ASTM A29 for bar forms. Both standards specify the same alloy composition and are used for mechanical and structural applications.

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