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ASTM A179 Seamless Steel Tubes, ASTM A179 heat exchanger tubes, and ASTM A179 condenser tubes represent the global benchmark for seamless cold-drawn low-carbon steel tubes specifically designed for tubular heat exchangers, condensers, and similar heat transfer apparatus . These minimum-wall-thickness tubes are engineered for applications requiring high-efficiency heat transfer, excellent internal surface smoothness, and reliable performance in low to medium-pressure services. As a cornerstone material within the ASME Boiler and Pressure Vessel Code, these cold-drawn seamless tubes ensure superior dimensional accuracy and consistent mechanical properties for critical thermal processing equipment.
As a specialized ASTM A179 standard tube, this product falls under the broader group of requirements specified in ASTM A450/A450M for carbon and low-alloy steel tubes . The standard mandates that tubes are manufactured exclusively through the seamless process and undergo cold-drawing to achieve their final dimensions and surface quality .
Key Scope of ASTM A179:
• Outside Diameter Range: Covers tubes from 1/8 inch to 3 inches (3.2 mm to 76.2 mm) .
• Wall Thickness: Focuses on minimum-wall-thickness designs to optimize heat transfer efficiency.
• Material Composition: Typically utilizes low-carbon steels such as Grade 1010, 1018, and 1020 to ensure good plasticity and weldability.
Technical Requirements & Chemical Composition
ASTM A179 steel tubes must conform to strict chemical composition and mechanical property requirements as outlined in the standard and its general requirement specification, ASTM A450/A450M .
Fundamental Technical Requirements:
• Heat and Product Analysis: Ensures the chemical composition conforms to specified limits for carbon, manganese, phosphorus, and sulfur .
• Mechanical Testing: Includes hardness testing, tensile testing to verify yield and tensile strength, and elongation.
• Formability Tests: Tubes undergo flattening tests, flaring tests, and flange tests to verify ductility and structural integrity .
• Pressure Integrity: Each tube is subjected to a hydrostatic test to ensure leak-free performance under pressure .
The production of ASTM A179 seamless tubes involves a controlled process from billet to finished tube, ensuring the highest quality.
Controlled Manufacturing & Dimensions:
• Seamless Process: The seamless tubes are manufactured by piercing a solid round billet, followed by a cold drawing process to achieve precise dimensions and a superior surface finish.
• Dimensional Precision: The cold-drawing process guarantees tight outer diameter and wall thickness tolerances, which is critical for easy installation in tube sheets.
• Standard Lengths: Typically supplied in standard lengths of 6m, 9m, and 12m.
ASTM A179 steel tubes from Tenjan are produced under a rigorous quality management system, ensuring full compliance with all standard-mandated tests.
Comprehensive Quality Assurance:
• ISO 9001 Certification: Our manufacturing process is certified under the ISO 9001 quality management system.
• Non-Destructive Testing (NDT): We employ advanced NDT methods as per standard requirements to detect any internal or surface imperfections.
• Third-Party Inspection Support: We fully support third-party inspections by agencies such as BV, SGS, and others, providing necessary documentation including Mill Test Certificates (MTC) that comply with ASTM A1016/A1016M.
Applications & Industrial Use
ASTM A179 seamless carbon steel tubes are the material of choice in various industries for efficient heat transfer.
• Heat Exchangers & Condensers: Widely used in shell and tube heat exchangers, condensers for power plants, and process industry heat transfer equipment .
• Boiler Systems: Serving as heating surface pipes in low and medium-pressure boilers .
• Industrial Processing: Found in petrochemical pipelines, refrigeration systems, and general service for water, steam, and oil.
Tenjan's Manufacturing Advantage
Tenjan leverages its extensive experience in seamless steel tube manufacturing to produce high-quality ASTM A179 tubes that meet the most demanding application requirements.
Our Commitment to Excellence:
• Full-Process Control: We maintain strict control over the entire production chain, from steelmaking to final cold-drawing and heat treatment.
• Technical Expertise: Our engineering team provides professional technical support to help you select the right product for your specific heat exchanger requirements.
• Customization & Service: We offer customized solutions in terms of dimensions and lengths, backed by responsive customer service and flexible order quantities to ensure seamless project integration.
By choosing Tenjan's ASTM A179 seamless tubes, you are selecting a reliable, standards-compliant product backed by a commitment to quality and performance that defines our leadership in the steel tube industry.
Precision Seamless Carbon Tubes for Industrial Applications
Custom Sizes OD10-108mm - ASTM/EN/DIN/JIS/GOST Certified - Small-Batch Friendly
| Parameter | Key Features |
| Outer Diameter | 10-108mm (0.39"-4.25") • Fully customizable |
| Wall Thickness | 1-20mm (0.039"-0.79") • ±0.1mm precision tolerance |
| Material | Carbon Steel • Alloy Steel • Special grades available |
| Process | Cold Drawn & Cold Rolled for superior finish |
| Industry | Typical Grades We Supply |
| GB | DT4,Y15,10#,20#,20G,Q235,25Mn,35#,45#,55# |
| ASTM | 1215,1008,1010,1020,A105,A106 Gr.B,A36,1026,1035,1045,1055,SA179,SA192 |
| EN | DC01,11SMn30,P235TR1,P195GH,P265TR2,E235 |
| DIN | DC01,11SMn30,CK10,C10,ST35.8,C20,CK20, ST45.8,St37,S235JR,C26D,CK35,CK45,CK55 |
| JIS | SUM22,S10C,STKM11A,STPT370,STB35,S20C,STKM12, STKM13,STPT410,STB42,SS400,S35C,S45C,S55C |
| GOST | 08КП,10,20,Ст3сп,25,35,45,55 |
| Other Speical Grades can be customized | |
| Standard | Key Applications Parts | Relevant Standards | Our Advantages |
| Automotive and Motorcycle Component | Shock Absorbers,Steering Systems,Thrust Rods | EN 10305-1,JIS G3445, DIN 2391,ASTM A519 | High fatigue strength,High yield strength,lightweight,precision dimensions (±0.1mm) |
| Engineering and Mining Support | Anchor Bolts,Support Pipes,Hydraulic Props | ASTM A519,DIN 2391, JIS G3441,EN 10297-1, ISO 10799 | High Strength &Yield Strength&High Elongation Customization Service - Special steel grades,dimensions and surface treatments available according to project requirements |
| Construction Machinery | Drive shaft sleeves ,Gearbox Guide Tubes,Crane Boom Guide Tubes,Excavator Arm Tubes,Loader Frame Tubes, Arctic Low-Temperature Tubes | ASTM A519,DIN 2391, JIS G3445,EN 10210-1, GOST 8733,ASTM A106, ISO 9329 | ID/OD tolerances of ±0.05mm.Wall thickness uniformity straightness ≤0.5mm/m |
| Fluid Transport Systems | Oil/Gas pipelines,chemical systems,Power/Energy | ASTM A106 Gr.B, EN 10216-2,GOST 8734 | Eddy Current + Ultrasonic Testing,Hydrostatic Testing |
| High-Pressure Boilers | Superheaters,Steam lines,Reheaters,Economizers) | ASTM A192,DIN 17175, EN 10216, JIS G3461/G3462 | Enhanced material density through cold-drawing/rolling ensures long-term stability Full Compliance with Int'l Standards,Superior Creep & Fatigue Resistance |
| Geological Drilling | Drill Pipe,Tubing | ASTM A519,API 5DP, EN 10208-2 | High Strength & Wear Resistance precision Dimensions Impact & Fatigue Resistance |
| Agricultural Machinery | Hydraulic cylinders,drive shafts,Lift arms, steering housings,Boom frames | ASTM A519,EN 10210-1, DIN 2391,GOST 8733, JIS G3445 | Material Advantages:High Strength & Lightweight,Precision Cold-Drawing Technology,Dimensional accuracy ±0.05mm |
| Petroleum Cracking Units | Reformer Tubes,Heat Exchanger Tubes,Reactor Feed Pipes,Transfer Lines,Quench Oil Pipes | ASTM A335,ASTM A213, EN 10216-2 | Optimized Material Purity,Precision Dimensional Control,Customized Solutions |
Tailored Features · Designed Exclusively for Your Needs
Breakthrough in Pure Iron 1215 Steel Tube Mass Production – 30% Cost Saved vs. Solid Bar Machining Industry-First Innovation:
We’ve achieved mass production of precision soft iron carbon tubes and 1215 free-cutting steel tubes, eliminating costly machining steps for OEMs.
Key Benefits:
✔ 30% Lower Total Cost– Replace solid round bars (no boring needed)
✔ Faster Production – Reduced machining & assembly time
✔ Less Waste – Precision hollow tubes optimize material use
Applications: Automotive, Hydraulics, Fasteners, and Machined Components.
Cold Drawing + Cold Rolling Dual-Process Technology – Affordable Small-Diameter Seamless Steel TubesInnovative Production for Precision Tubes:
Our self-developed piercing mill combines cold drawing & cold rolling, optimizing efficiency for small-diameter seamless steel tubes (OD<50mm).
Key Advantages:
✔ Lower Cost – Dual-process reduces material waste & energy use
✔ Tighter Tolerances– Improved surface finish & dimensional accuracy
✔ Faster Lead Time– Streamlined production vs. traditional methods
Applications: Automotive, Hydraulics,Oil & Gas/Petrochemical，High-Pressure Boilers，and Fluid Transport Systems.
100+ Carbon Steel Grades – Customize for 20% Cost Savings (Machining,Construction More） Premium Steel Supply Chain:
Partnering with Baosteel, Xingcheng Shagang, we offer 100+ fully customizable carbon steel grades with guaranteed quality and stable supply.
Customization Advantages:
✔ Chemical Composition– Adjust C, Mn, Si, etc. for specific applications
✔ Mechanical Properties– Yield/Tensile strength optimization
✔ Rigorous QC– Full inspection (UT, hardness testing, dimensional checks)
✔ 20% Procurement Savings– Bulk pricing process efficiency
Key Industries Served: Machining Automotive，Construction Infrastructure, Oil Gas, Heavy Equipment
High-Precision Tube Straightening Technology - ≤0.5mm/m Tolerance for 30% Faster MachiningIndustry-Leading Straightening Solutions:
Our proprietary system delivers carbon steel tubes with ≤0.5mm/m straightness-4X more precise than industry standards, specifically engineered for high-speed machining applications.
Key Advantages:
✔ 30% Production Boost- Perfect straightness reduces lathe processing time
✔ Tool Life Extension- Minimizes cutting tool stress and wear
✔ Cost Efficiency- Lower maintenance and higher throughput
Technical Superiority:
In-House Developed Equipment- Customized for machining-grade precision
20+ Years Expertise- Master technicians ensure optimal results
Automated Quality Control- Consistent straightness verification
Ideal for:Hydraulic Cylinder Tubes, Automotive Shafts, Industrial Machinery, Oil Gas Equipment
Ultrasonic + Eddy Current Dual-Testing - 0.20mm Flaw Detection for Critical Steel Tubes Industry-Leading NDT Precision:
Our dual-technology inspection systemdelivers 0.20mm flaw detection accuracy- the gold standard for mission-critical tubing applications.
Dual-Testing Advantages:
✔ Ultrasonic Testing (UT)- Detects 0.20mm micro-cracks & inclusions
✔ Eddy Current (ET)- Pinpoints surface/subsurface defects
✔ Multi-Probe Array- 360° coverage (ID/OD/wall thickness)
Two-Layer Quality Assurance
Flaw Detection: Cracks/pores/inclusions ≤0.20mm
Dimensional Control: ±0.05mm tolerance verification
Critical Applications: Automotive Airbag Tubes,Fluid Transport Systems, Petrochemical High-Pressure Piping
Why settle for generic materials when we can align specifications directly to your application? By focusing on only what you need, we deliver superior cost efficiency without compromising quality—saving you time and resources.
Our surplus capacity acts as a safety net, eliminating risks of bottlenecks or missed deadlines—critical for projects with strict timelines.
• Advanced metalworking: Piercing, pickling, heat treatment & cold forming
• Precision verification: Dual NDT (Ultrasonic/Eddy Current) + material testing (Tensile/Chemical)
• 24/7 lab monitoring of 60+ parameters ensuring product consistency
IATF16949: Automotive-grade quality for precision parts.
TS (Pressure Pipe): Safety compliance for critical infrastructure (e.g., pipelines, boilers).
ISO9001: General excellence in process management.
Plus optional third-party validation (TÜV/SGS) for added credibility in regulated markets like aerospace, energy, or medical devices.
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