ASTM A135 Pipe: Your Premier Source for Grade A & B ERW Steel Pipes

When your projects require a dependable, high-performance, and economically sound solution for conveying gas, vapor, water, or other liquids in low to medium-pressure systems, or for robust structural applications, look no further than ASTM A135 Pipe. At Corten Steel Tube, aligning with your URL), we stand as your trusted global supplier and exporter, delivering precision-engineered ASTM A135 Electric-Resistance-Welded (ERW) carbon steel pipes, including material compliant with ASME SA135 Carbon Steel Pipe standards. Our commitment is to provide products that not only meet but consistently exceed stringent quality benchmarks and demanding industrial performance expectations, ensuring your systems operate flawlessly and efficiently.

Our extensive product line of ASTM A135 Pipe plays a pivotal role in supporting critical infrastructure across a diverse array of industries, including oil & gas, petrochemical processing, power generation, water distribution, HVAC systems, fire protection, and general structural engineering. Every pipe we supply is backed by our rigorous quality assurance processes, options for third-party certifications, and adherence to global compliance standards, giving you complete peace of mind. When you partner with us for your ASTM A135 Grade A & B Pipes, you’re choosing reliability, performance, and a commitment to excellence that underpins your project’s success.

Decoding the Standard: What Exactly is ASTM A135 Pipe?

ASTM A135 Pipe is a specification developed by ASTM International that defines electric-resistance-welded (ERW) carbon steel pipes designed for conveying gas, vapor, water, or other low-pressure fluids. It is primarily used in mechanical systems, HVAC infrastructure, fire protection piping, and light-duty industrial applications where moderate strength, weldability, and dimensional consistency are required.

This standard covers two grades — Grade A and Grade B — differentiated by their mechanical properties, specifically tensile and yield strength. These pipes are produced in NPS 1/2” to NPS 10” and furnished either in the as-welded condition or after appropriate heat treatment, depending on the application requirements.

What sets ASTM A135 apart is its balance of cost-efficiency and performance. The pipes are manufactured using low-carbon steel, which ensures easy formability and excellent weldability, making them ideal for projects with demanding fabrication and installation timelines.

Engineers and procurement professionals prefer ASTM A135 for:

Fire sprinkler systems
Low-pressure compressed air and steam systems
Structural supports in commercial buildings
Chilled water and HVAC systems

Because it conforms to both ASTM A135 and ASME SA135 standards, this pipe type is also accepted in regulated environments where ASME codes are mandated, adding a layer of assurance for projects that require code compliance and traceability.

In summary, ASTM A135 Pipe is a reliable, versatile solution that offers strength, safety, and specification clarity, making it a trusted choice in the global piping supply chain for low- to medium-pressure applications.

Specifications of ASTM A135 Pipe

To ensure our ASTM A135 Pipe perfectly aligns with your project’s technical demands, a clear understanding of its detailed specifications is essential. At Corten Steel Tube, we supply pipes manufactured in strict accordance with these requirements:

Specification Element	Details & Options Available
Governing Standards	ASTM A135 / A135M: Standard Specification for Electric-Resistance-Welded Steel Pipe. <br/> ASME SA135 / SA135M: Identical specification for use under ASME Boiler and Pressure Vessel Code. (We can provide dual-certified material.)
Available Grades	Grade A: Lower strength, higher ductility. <br/> Grade B: Higher strength, moderate ductility.
Size Range (Nominal Pipe Size – NPS & Outside Diameter – OD)	Typically from NPS 1/2” (OD 21.3 mm / 0.840 inches) up to NPS 12” (OD 323.9 mm / 12.750 inches). Larger sizes may be available under different ERW specifications or by special inquiry.
Wall Thickness (Schedule)	Commonly available in Schedule 10 (SCH 10), Schedule 30 (SCH 30), and Schedule 40 (SCH 40 / Standard Wall – STD). Other schedules or specific wall thicknesses may be available upon request to meet particular pressure or structural requirements.
Standard Lengths	Single Random Length (SRL): Typically 16 to 22 feet (4.8 to 6.7 meters). <br/> Double Random Length (DRL): Typically 35 to 44 feet (10.7 to 13.4 meters). <br/> Custom Cut-to-Lengths: Precision cut to your exact specified lengths to minimize on-site work and material waste.
Dimensional Tolerances	As per ASTM A530 / A530M (General Requirements for Specialized Carbon and Alloy Steel Pipe), which is referenced by ASTM A135. This covers permissible variations in OD, wall thickness, weight, and length.
Manufacturing Process	Electric Resistance Welded (ERW): Produced from cold-formed steel strip with a longitudinal weld seam created by electrical resistance heating and pressure, without the addition of filler metal.
Available Surface Finishes	Bare / Uncoated: Plain steel surface. <br/> Black Painted: Coated with a layer of black varnish or paint for temporary rust protection and improved appearance. <br/> Galvanized (Hot-Dip or Electroplated): Coated with a layer of zinc for enhanced corrosion resistance. <br/> Anti-Rust Oiled: Lightly oiled to prevent atmospheric corrosion during transit and storage. <br/> Other Specialized Coatings: Epoxy, Polyethylene (PE), Fusion Bonded Epoxy (FBE) available upon request for specific service conditions.
Pipe End Types	Plain Ends (PE): Square cut, suitable for socket welding, flanged connections, or mechanical couplings. <br/> Beveled Ends (BE): Angled ends prepared for butt welding, facilitating stronger welded joints. <br/> Threaded Ends (TE): With NPT (National Pipe Thread) or other standard threads, often supplied with couplings (Threaded & Coupled – T&C). <br/> Grooved Ends: For use with grooved mechanical couplings.
Marking Requirements	As per ASTM A135 and ASTM A530, typically including manufacturer’s name or mark, standard designation (A135), grade (A or B), size, wall thickness/schedule, heat number, and length. Custom marking available.

This comprehensive range of specifications ensures that you can find the precise ASTM A135 Pipe solution tailored to your application’s unique functional, installation, and environmental demands.

Material Details and Chemical Composition of ASTM A135 Pipe

Our ASTM A135 and ASME SA135 Pipes are meticulously manufactured using selected low to medium carbon steel grades. This choice of material is deliberate, as it offers an excellent combination of formability, weldability, and machinability, all while providing adequate strength for their intended service.

Chemical Composition of ASTM A135 Pipe

The chemical composition is carefully controlled to ensure the desired mechanical properties and weldability. Here are the typical maximum or range values for key elements:

Element	Grade A (%) (Max, unless range indicated)	Grade B (%) (Max, unless range indicated)	Significance of the Element in Steel
Carbon (C)	≤ 0.25	≤ 0.30	The primary hardening element in steel. Higher carbon content increases strength and hardness but generally reduces ductility and weldability. The levels in Grades A and B are optimized for a good balance.
Manganese (Mn)	≤ 0.95	≤ 1.20	Increases strength and hardness (though less so than carbon). It also acts as a deoxidizer and desulfurizer during steelmaking, improving toughness and hot workability. Grade B allows for slightly higher Mn to achieve its higher strength.
Phosphorus (P)	≤ 0.035	≤ 0.035	Generally considered an impurity. High phosphorus can reduce ductility and toughness, especially at low temperatures (leading to “cold shortness”). Kept to low levels to ensure material integrity.
Sulfur (S)	≤ 0.035	≤ 0.035	Also an impurity. High sulfur can negatively impact toughness (especially transverse toughness) and weldability (can promote hot cracking). While it aids machinability in “free-cutting” steels, it’s restricted in A135 for overall performance.
Silicon (Si)	Not explicitly specified with a range in ASTM A135, but typically present from deoxidation practices, often in the range of 0.10 – 0.40% if added.	Not explicitly specified, similar to Grade A.	Primarily used as a deoxidizing agent during steelmaking to remove oxygen and improve soundness. It also contributes modestly to strength.
Copper (Cu)	≤ 0.20 (if agreed between purchaser and manufacturer)	≤ 0.20 (if agreed)	May be present as a residual element. Higher levels can sometimes affect surface quality or hot workability if not controlled.
Nickel (Ni)	≤ 0.20 (if agreed)	≤ 0.20 (if agreed)	Residual element.
Chromium (Cr)	≤ 0.15 (if agreed)	≤ 0.15 (if agreed)	Residual element.
Molybdenum (Mo)	≤ 0.06 (if agreed)	≤ 0.06 (if agreed)	Residual element.
Vanadium (V)	≤ 0.02 (if agreed)	≤ 0.02 (if agreed)	Residual element.
Columbium (Niobium – Cb/Nb)	≤ 0.02 (if agreed)	≤ 0.02 (if agreed)	Residual element.

Mechanical Properties – Defining Strength and Ductility

The mechanical properties are critical indicators of how the pipe will perform under applied loads. ASTM A135 specifies minimum requirements for tensile strength, yield strength, and elongation:

Property	Grade A	Grade B	What This Means for Your Application
Tensile Strength (Minimum)	48,000 psi (330 MPa)	60,000 psi (415 MPa)	This is the maximum stress the pipe can withstand while being stretched or pulled before it starts to neck down and eventually fracture. Grade B offers approximately 25% higher tensile strength than Grade A, making it suitable for applications with higher tensile loads or internal pressures.
Yield Strength (Minimum)	30,000 psi (205 MPa)	35,000 psi (240 MPa)	This is the stress at which the pipe begins to deform permanently (it won’t return to its original shape when the load is removed). It’s a crucial design parameter, as engineers typically design systems so that service stresses remain below the yield strength. Grade B has a higher yield strength, allowing it to handle greater stresses before permanent deformation occurs, providing a higher safety margin or allowing for slightly thinner walls in some pressure calculations.
Elongation (Minimum % in 2 inches / 50 mm)	≥ 35% (for wall thicknesses ≥ 5/16 in. (7.9mm)) <br/> (Varies slightly with wall thickness, see standard for details)	≥ 30% (for wall thicknesses ≥ 5/16 in. (7.9mm)) <br/> (Varies slightly with wall thickness, see standard for details)	This measures the pipe’s ductility – its ability to stretch or deform plastically before fracturing. Higher elongation indicates better formability (e.g., for bending) and often implies greater toughness. Grade A, with its higher minimum elongation, is generally more ductile and easier to cold form than Grade B.

These specified mechanical properties ensure that ASTM A135 Pipe provides a reliable and predictable level of performance for its intended applications.

Uncompromising Quality: Certifications & Our Rigorous Quality Assurance for ASTM A135 Pipe

At Corten Steel Tube, quality is not just a buzzword; it’s the bedrock of our operations and your assurance of receiving ASTM A135 Pipe that meets the highest standards of performance and reliability. Our comprehensive quality assurance program encompasses every stage, from raw material sourcing to final dispatch.

Quality Element	Details
Mill Test Certificates (MTCs)	Provided as per EN 10204 3.1 / 3.2 with every shipment, ensuring full traceability and verified batch compliance.
EN 10204 3.1 Certificate	Issued by the manufacturer, confirming conformity to order requirements with test data from the specific batch.
EN 10204 3.2 Certificate	Verified by both the manufacturer’s and an independent or customer-appointed inspector, often including witnessed testing.
ISO 9001:2015 Certification	All production and internal QA processes conform to ISO 9001:2015 for consistent quality, traceability, and customer satisfaction.
Third-Party Inspection (TPI)	Available upon request from agencies like BV, SGS, TÜV, DNV GL, Lloyd’s Register, or customer-specified bodies. Includes: dimensional checks, MTC review, mechanical & chemical tests, NDT witnessing, compliance checks.
International Standards & Approvals	– PED 2014/68/EU for pressure equipment (EU) – IBR Certified for boiler & steam applications (India) – NACE MR0175 / ISO 15156 for sour gas environments (upon request) – Other global standards met as per project requirements
Full Traceability	Each pipe traceable from heat number to final dispatch. Complete compliance documentation included with every order.
Chemical Composition Testing	Confirms compliance with ASTM A135 Grade A/B chemical specifications.
Tensile & Mechanical Testing	Verifies yield strength, tensile strength, and elongation in accordance with ASTM and customer specs.
Flattening Test	Evaluates ductility of the base metal and weld seam by subjecting a sample to deformation without cracking.
Hydrostatic Test (Hydrotest)	Every pipe undergoes pressure testing to confirm leak-free integrity and pressure resistance.
NDE of Weld Seam	Ultrasonic or Eddy Current Testing ensures ERW seam is free from internal/external defects.
Dimensional Verification	Checks for OD, wall thickness, straightness, and length as per ASTM A530 tolerances.
Visual Inspection	Confirms surface quality and absence of injurious defects prior to dispatch.

By implementing these comprehensive quality assurance measures and rigorous testing protocols, we provide you with ASTM A135 Pipe that you can install with complete confidence, knowing it will deliver reliable and safe performance throughout its intended service life.

Applications & Industries of ASTM A135 Pipe

The reliability, cost-effectiveness, and good all-around performance characteristics of our ASTM A135 Pipes make them an integral component in a wide array of low to medium-pressure fluid and gas transmission systems, as well as various structural applications across diverse industries. Their versatility ensures they are a go-to solution for engineers and project managers worldwide. Key Applications Where ASTM A135 Pipe Excels:

Fire Protection Systems (Sprinkler Piping): ASTM A135 is a go-to material for fire sprinkler systems due to its excellent flow characteristics, corrosion resistance (when coated or galvanized), and reliable weldability.
HVAC and Mechanical Systems: Ideal for chilled water piping, steam condensate lines, and low-pressure heating and cooling loops in commercial buildings and industrial facilities.
Compressed Air Systems: Commonly used for distributing compressed air in manufacturing plants and automotive facilities, offering a cost-effective and durable piping solution.
Low-Pressure Steam Applications: Suitable for systems requiring moderate pressure resistance with high dimensional accuracy and leak-free performance.
General Structural Use: ASTM A135 pipes are often used in non-critical structural components, especially where weight-saving is a priority without compromising strength.
Underground Piping & Utility Conduits: When appropriately coated, these pipes are employed in underground installations for utilities, telecom cables, or protective sleeves.

The widespread use of ASTM A135 Pipe across these varied applications and industries is a testament to its balanced performance, economic advantages, and the reliability assured by adherence to this internationally recognized standard.

Ensuring Your Project Stays on Track: Product Availability & Global Delivery of ASTM A135 Pipe

At Corten Steel Tube, we understand that timely access to high-quality materials is critical for the success and smooth execution of your projects. That’s why we are committed to maintaining robust product availability and offering efficient global delivery for our ASTM A135 Pipe.

Extensive Inventory for Immediate Dispatch

Our strategically located stockyards and partner warehouses across the India, Europe, Middle East, and Asia allow us to maintain a ready inventory of ASTM A135 Grade A & B ERW Pipes in a variety of:

Sizes (NPS 1/2″ to 10″)
Wall thicknesses (Schedules 10 to 40)
Surface finishes (Black, Bare, Galvanized)
End finishes (Plain End, Beveled End, Threaded)

Whether you need bulk quantities for a large infrastructure project or custom-cut lengths for modular systems, our inventory is prepared to meet urgent demands.

Reliable Global Logistics & Delivery

We specialize in international exports of ASTM A135 Pipes to over 75+ countries, backed by an experienced logistics team that ensures:

Fast processing & packaging to meet sea/air freight schedules
ISPM 15 certified export packaging for moisture and corrosion protection
Seamless documentation for customs clearance, including country-specific certifications, mill test reports (MTCs), and third-party inspection reports
Coordination with leading global carriers for both containerized shipments and LCL consignments

Just-in-Time (JIT) Delivery for Time-Sensitive Projects

For EPC contractors, OEMs, and fabricators working on tight schedules, we offer:

JIT delivery programs
Drop-shipping to project sites
Consolidation with multi-product orders

This ensures your supply chain stays lean, your warehousing costs are minimized, and your installation schedules remain uninterrupted.

Tailored Solutions for Every Region

We also ensure compliance with regional standards and requirements including:

ASTM A135 compliance for US and international codes
EN & ISO-compatible documentation
IBR, PED, NACE-compliant material on request

We are dedicated to making the procurement of your ASTM A135 Pipe as seamless and efficient as possible, from initial inquiry to final delivery at your project site

Have questions about A135 Corten steel Pipe? Get in touch with us for more information!

Transparent & Competitive: Pricing & Quotations for ASTM A135 Pipe

At Corten Steel Tube, we believe in providing transparent, fair, and highly competitive pricing for our premium quality ASTM A135 Pipe. We understand that budget is a critical factor in every project, and we strive to offer cost-effective solutions without ever compromising on the quality, compliance, or performance of our products.

Pipe Specification	Estimated Price Range (INR/kg)
ASTM A106 Grade B Seamless Pipe	₹58 – ₹92
ASTM A53 Grade B Carbon Steel Seamless Pipe	₹65
ASTM A333 Grade 6 Seamless Pipe	₹80
ASTM A335 P9 Alloy Seamless Pipe	₹284
ASTM A312 TP310S Stainless Steel Pipe	₹616

We aim to build long-term partnerships with our clients by offering exceptional value, combining high-quality ASTM A135 Pipe with fair pricing and transparent business practices.

Why Choose Corten Steel Tube As Your Reliable Partner

Choosing a supplier for critical materials like ASTM A135 Pipe is a decision that impacts your project’s quality, timeline, and budget. At Corten Steel Tube, we have built our reputation on a foundation of trust, quality, and unwavering customer satisfaction. Here’s why industry leaders and project managers across the globe consistently choose us:

40+ Years of Global Export Expertise
Trusted across 75+ countries for smooth, compliant, and timely international deliveries.
Preferred by Fortune 500 EPCs & Governments
Proven capability to meet high-volume, high-spec projects with precision and reliability.
Strong Customer Loyalty
High satisfaction and repeat business reflect the trust we’ve built worldwide.
Secure Payments & Full Support
Safe transactions, transparent policies, and reliable after-sales service.
Verified on Major B2B Platforms
Trusted presence on IndiaMART, Alibaba, and Made-in-China with top-rated reviews.
Quality-Focused, Partnership-Driven
We deliver pipes that meet strict standards—and support your long-term success.
Responsive Team, Real-Time Updates
Dedicated account managers ensure smooth communication from order to delivery.

Choosing Corten Steel Tube for your ASTM A135 Pipe needs means choosing a partner with a demonstrated history of excellence, a global footprint, and an unwavering commitment to making your procurement process efficient, reliable, and successful.

Explore Related Grades & Pipe Standards – We’ve Got Your Piping Needs Covered!

While ASTM A135 Pipe is a top choice for low-pressure conveyance and structural systems—particularly in fire protection, HVAC, and light mechanical piping—we understand that your projects may call for enhanced strength, weather resistance, or specific aesthetic characteristics. At Corten Steel Tube, we also stock a wide range of weathering and corrosion-resistant steel pipe grades to suit diverse architectural, structural, and industrial needs.

Explore Other Popular Corten & Weathering Steel Grades

ASTM A242 Pipes
A high-strength, low-alloy weathering steel ideal for structural applications where enhanced corrosion resistance is required. Commonly used in bridges, building facades, and outdoor structural elements.
ASTM A423 Corten Steel Pipes
This specification covers seamless and welded steel pipes intended for high-temperature service and superior corrosion resistance. Widely used in boilers, heat exchangers, and outdoor piping systems.
ASME SA423 Corten Steel Pipes
The ASME equivalent of ASTM A423, meeting boiler and pressure vessel requirements. Ideal for environments demanding both structural integrity and rust resistance.
ASTM A847 Corten Steel Pipe & Tube
Specifically designed for structural tubing applications in bridges, signposts, and open-frame buildings. It provides atmospheric corrosion resistance and is often used where painting is not required.
ASTM A606 Corten Steel Pipes & Tubes
A versatile specification suitable for roll-formed building panels, structural shapes, and formed parts. It provides excellent weather resistance and is commonly used in architectural applications.

FAQs

What is the difference between ASTM A135 Grade A and Grade B?

Grade B has higher yield and tensile strength than Grade A, making it suitable for high-pressure applications.

Can ASTM A135 pipes be used for structural applications?

Yes, especially Grade B pipes are commonly used in structural and mechanical tubing.

Is Corten Steel compatible with ASTM A135 standards?

Yes, ASTM A135 pipes and tubes can be manufactured using Corten Steel for enhanced corrosion resistance.

What sizes are available in ASTM A135 pipes and tubes?

Standard sizes range from NPS 1/8” to 5” in various thicknesses and schedules.

What is the difference between ASME SA135 and ASTM A135?

ASTM A135 covers ERW pipes for low-pressure use. ASME SA135 is its ASME version, meeting BPVC standards, ideal for pressure vessels and regulated applications.

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