ASTM A268 TP430 stainless steel seamless pipe
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If you are looking for high-quality ASTM A268 TP430 stainless steel seamless tubes, GNEE Stainless Steel is a professional manufacturer with many years of experience in producing high-quality stainless steel pipes and piping solutions. Our factory is equipped with advanced production lines and precision testing equipment, ensuring that every seamless tube meets strict international standards.
We specialize in providing ASTM A268 TP430 stainless steel seamless tubes in various sizes and specifications, serving industries such as chemical, petrochemical, power generation, and construction. ASTM A268 TP430 stainless steel tubes are manufactured using seamless cold drawing or hot rolling processes, free from welding defects. They have a nominal pressure rating of ≤10 MPa, excellent impact and fatigue resistance, and can withstand temperatures up to 700°C. These pipes have good cold bending and welding properties, requiring no complex preheating.
The dimensional tolerances of ASTM A268 TP430 stainless steel round tubes are strictly controlled, with an outer diameter tolerance of ±0.5 mm and a wall thickness tolerance of ±0.1 mm. In addition, they possess good thermal conductivity and magnetic properties. Compared to austenitic stainless steel, they offer cost savings of over 30%, while their corrosion resistance is superior to carbon steel in ordinary atmospheric environments and weak acidic or alkaline environments.
Stamping Process of ASTM A268 TP430 Stainless Steel Seamless Pipes
The punching process of ASTM A268 TP430 stainless steel seamless pipes follows standard procedures:
◆Inspection and Cutting: Flaw-free raw materials are inspected and cut to precise lengths to ensure defect-free billets.
◆Billet Preheating: Billets are preheated to enhance plasticity, preventing cracking or deformation during punching.
◆Hydraulic Punching: Pipes are formed in a single operation using hydraulic presses with specialized dies.
◆Sizing and Straightening: After punching, pipes are sized and straightened, with strict control of outer diameter and wall thickness tolerances in accordance with ASTM A268 standards.
◆Surface Treatment and Preliminary Testing: Pipes undergo oil and rust removal, followed by initial mechanical performance testing to ensure the quality and structural integrity of the punched products.
ASTM A268 TP430 Chemical Composition (%)
| C |
Mn |
P | S |
Si |
Cr |
| ≤0.12% | ≤1.00% | ≤0.040% | ≤0.030% | ≤1.00% | 16.0%~18.0% |
Click to download the corrosion resistance report for 430 stainless steel pipes
ASTM A268 Mechanical Properties
| Grade | Tensile Strength, Min, Ksi [MPa] | Yield Strength, Min, Ksi [MPa] | ELONGATION. MIN, % |
| TP430 | 60 [415] | 35 [240] | 20 |
ASTM A268 TP430 Physical Properties
| Density, g/cm3 (lb/in.3) | 7.8 (0.28) |
| Melting point, °C (°F) | 1425-1510 (2600-2750) |
| Specific heat capacity, J/kg · K (Btu/lb · °F) | 460 (0.11) at 0-100 °C (32 to 212 °F) |
| Electrical resistivity, μΩ·m | 0.60 at 20 ℃ |
| 430 stainless steel magnetic permeability | 600-1100 (Approximate) |
| Elastic modulus (Modulus of elasticity), GPa (106 psi) | 200 (29.0) |
| Thermal diffusivity, mm2/s | 7.3 |
| Thermal conductivity, W/m · K (Btu/ft · h · °F) | 26.1 (15.1), at 100 ℃ (212 °F) |
| 26.3 (15.2), at 500 ℃ (932 °F) | |
| Coefficient of thermal expansion, μm/m · °C (μin./in. · °F) | 10.4 (5.8), at 0-100 ℃ (32-212 °F) |
| 11.0 (6.1), at 0-315 ℃ (32-600 °F) | |
| 11.4 (6.3), at 0-538 ℃ (32-1000 °F) |
ASTM A268 Test Requirements
The tubes shall have a hardness number that will not exceed the prescribed Brinell and Rockwell hardness values, TP410, TP430 and TP439 max Rockwell hardness 90, Test report required certification conform to Specification A1016/A1016M.
Several mechanical tests shall be conducted, namely:
Hydrostatic or nondestructive electric test.
Tension test;
Flaring test (for seamless tubes);
Flange test (for welded tubes);
Hardness test;
Reverse flattening test;
Intergranular corrosion test; and
GNEE has nearly 18 years of extensive experience in the production of seamless stainless steel pipes. Every pipe undergoes rigorous testing, including dimensional, surface, PMI, eddy current, or hydraulic testing. Only high-quality pipes are packaged and delivered to customers worldwide. Our pipe products cover both imperial and metric sizes, with outer diameters ranging from 1.58 mm to 108 mm. Special sizes can be customized.
ASTM A268 Stainless Steel Tubing Specification
| Standard | ASTM A268, ASME SA268 |
|---|---|
| Tube Type | Both Welded And Seamless |
| Grades | ASTM A268 TP 410, ASTM A268 TP 430, ASTM A268 TP 439 |
| Outside Diameter | 1/4″ (6.25mm) To 8″ (203mm) |
| Wall Thickness | 0.02″ (0.5mm) To 0.5″(12mm) |
| Application | Heat Exchanger, Heater, Condenser |
All pipes are carefully packaged before shipment, coated with a protective layer, and secured with steel straps. They are then loaded into export-standard wooden crates or containers to minimize the risk of damage during transportation. We offer flexible delivery options, with a typical delivery time of 15 to 30 days, depending on the order size and specifications.
