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- SS SMLS PIPE S31803 ASTM A790
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China Suppliers of ASTM A269/A213 TP317 Seamless Stainless Steel Tubes | Reliable Factory Stock & Fast Delivery
Introduction
ASTM TP317 refers to a specification for 317 stainless steel (UNS S31700), a molybdenum-bearing austenitic stainless steel under standards such as ASTM A240/A240M for plates and sheets. It is designed for applications requiring enhanced corrosion resistance, particularly in chloride-rich environments. This grade contains higher molybdenum (3–4%) compared to 316 stainless steel, improving its performance in aggressive chemical and marine settings.
Key Features
Superior Corrosion Resistance
Excels in environments with chlorides (e.g., seawater, coastal areas) due to its high molybdenum content, which inhibits pitting and crevice corrosion.
Performs well in sulfuric acid (concentrations <15% and >85%) and organic acids, making it suitable for chemical processing equipment.
Maintains stability at high temperatures (up to 870°C) and resists scaling in oxidizing atmospheres.
Mechanical Properties
~520 MPa (as-annealed), with elongation up to 40%, ensuring ductility for forming and welding.
≤90 HRB (Rockwell B), balancing strength and machinability.
Thermal Stability
~16.3 W/m·K at 100°C, increasing to 21.58 W/m·K at 500°C, suitable for heat exchangers.
Linear expansion coefficient of 16×10⁻⁶/K (0–100°C), minimizing dimensional changes under thermal stress.
Weldability
Compatible with standard welding techniques (e.g., TIG, MIG). Post-weld annealing is recommended to restore corrosion resistance in critical applications.
Material Specification
Standard:
ASTM A269 & A213
O.D:
1/8" NB TO 32" NB (10.29MM-812.80MM) (Customization Available)
W.T:
SCH 10S, SCH 40S, SCH 80S, SCH160, SCH XXS (Customization Available)
Application:
Chemical & Petrochemical Industries
Marine & Offshore
Energy & Power Generation
Pulp & Paper Industry
Medical & Pharmaceutical
Marine & Offshore
Energy & Power Generation
Pulp & Paper Industry
Medical & Pharmaceutical
End:
Plain End, Beveled End, Threaded
Processing:
Cut-to-length; Polishing.
Inspection:
100% PMI TESTED
EN10204.3.1B MILL TEST CERTIFICATE
THIRD PARTY INSPECTION ACCEPTED
EN10204.3.1B MILL TEST CERTIFICATE
THIRD PARTY INSPECTION ACCEPTED
Delivery Condition:
Cold Drawn, Annealed and Pickled / Polished / Bright Annealed / Sand blasting / Shot Blasting.
Marking:
All SS SMLS Pipes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or as per the customer’s request)
Packing:
Packed in Wooden Boxes, plywood cases, Steel Strips Bundled, or as per Customers Requests
Specials:
Sizes and Specifications other than above can be customized on request.
Specification Parameters
CHEMICAL COMPOSITION - TP317 (ASTM A269 & A213)
| HEAT NO. | CHEMICAL COMPOSITION (%) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Ni | Cr | Mo | ||
| STAND. | MIN. | 11.00 | 18.00 | 3.0 | |||||
| MAX. | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 15.00 | 20.00 | 4.0 | |
Mechanical Properties - TP317 (ASTM A269 & A213)
| Mechanical Properties | |||||
|---|---|---|---|---|---|
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness MAX | |
| Rockwell (HRB) | Brinell (HBW) | ||||
| ASTM A269 TP317 | 90 | 192 | |||
| ASTM A213 TP317 | 515 | 205 | 34 | 90 | 192 |
Equivalent Grades - (ASTM A269 & A213 TP317 Equivalent Grades)
| ASTM A269 & A213 TP317 Equivalent Grades | ||||
|---|---|---|---|---|
| USA (ASTM / UNS) | Germany (DIN, WNr) | Euronorms (EN) | China (GB) | International (ISO) |
| TP317 / S31700 / 317 | X5CrNiMo17-13-3 | X5CrNiMo17-13-3 / 1.4439 | 0Cr19Ni13Mo3 | S31700 / 03Ch18N14M3 |
ASTM A269/A269M Standard Cold Machining Size Deviation Permitted
| ASTM A269/A269M Standard cold machining size deviation permitted | ||||||
|---|---|---|---|---|---|---|
| Group | Size, Outside Diameter, in. [mm] | Permissible Variations in Outside Diameter, in. [mm] | Permissible Variations in Wall Thickness, A % | Permissible Variations in Cut Length, in. [mm] B | Thin Walled Tubes C | |
| Over | Under | |||||
| 1 | Up to 1/2 [13] | ±0.005 [0.13] | ±15 | 1/8 [3.2] | 0 | ... |
| 2 | 1/2 to 1 1/2 [13 to 38], excl | ±0.005 [0.13] | ±10 | 1/8 [3.2] | 0 | less than 0.065 in. [1.65 mm] nominal |
| 3 | 1 1/2 to 3 1/2 [38 to 89], excl | ±0.010 [0.25] | ±10 | 3/16 [4.8] | 0 | less than 0.095 in. [2.41 mm] nominal |
| 4 | 3 1/2 to 5 1/2 [89 to 140], excl | ±0.015 [0.38] | ±10 | 3/16 [4.8] | 0 | less than 0.150 in. [3.81 mm] nominal |
| 5 | 5 1/2 to 8 [140 to 203], excl | ±0.030 [0.76] | ±10 | 3/16 [4.8] | 0 | less than 0.150 in. [3.81 mm] nominal |
| 6 | 8 to 12 [203 to 305], excl | ±0.040 [1.01] | ±10 | 3/16 [4.8] | 0 | less than 0.200 in. [5.08 mm] nominal |
| 7 | 12 to 14 [305 to 356], excl | ±0.050 [1.26] | ±10 | 3/16 [4.8] | 0 | less than 0.220 in. [5.59 mm] nominal |
Frequently Asked Questions (FAQ)
What is the difference between TP317 and 316 stainless steel?
TP317 contains a higher molybdenum content (3% to 4%) compared to 316 stainless steel. This enhancement provides superior corrosion resistance, particularly against pitting and crevice corrosion in chloride-rich and marine environments.
What standard specifications apply to ASTM TP317?
ASTM TP317 commonly conforms to ASTM A269 and ASTM A213 standards for seamless and welded tubes, as well as ASTM A240/A240M for plates, sheets, and strips.
What are the primary applications of TP317 stainless steel?
Due to its high chemical stability, it is extensively used in the chemical and petrochemical industries, marine and offshore environments, energy and power generation, pulp and paper manufacturing, and the medical and pharmaceutical sectors.
Can TP317 stainless steel be welded?
Yes, TP317 is highly weldable using standard methods like TIG (GTAW) and MIG (GMAW). However, post-weld annealing is recommended for critical applications to restore optimal corrosion resistance in the heat-affected zone.
What are the mechanical properties of ASTM A213 TP317?
ASTM A213 TP317 features a minimum tensile strength of 515 MPa, a minimum yield strength of 205 MPa (0.2% Proof), elongation of at least 34% in 50mm, and a maximum hardness of 90 HRB (Rockwell B) or 192 HBW (Brinell).
What delivery conditions are available for TP317 seamless pipes?
TP317 pipes can be delivered in various finishes including Cold Drawn, Annealed and Pickled, Polished, Bright Annealed, Sand Blasted, or Shot Blasted depending on the application requirements.