-
Products
- VALVES
- FITTINGS
- FORGED FLANGE
- SS WELDED PIPE&TUBE
- SS SMLS TUBE
-
SS SMLS PIPE
- SS SMLS PIPE 2507 ASTM A790
- SS SMLS PIPE 2205 ASTM A790
- SS SMLS PIPE S31803 ASTM A790
- SS SMLS PIPE 904L ASTM A240
- SS SMLS PIPE TP321 ASTM A312
- SS SMLS PIPE TP310S ASTM A312
- SS SMLS PIPE TP316Ti ASTM A312
- SS SMLS PIPE TP316L ASTM A312
- SS SMLS PIPE TP316 ASTM A312
- SS SMLS PIPE TP304L ASTM A312
- SS SMLS PIPE TP304 ASTM A312
ASTM A269/A213 TP317 Stainless Steel Seamless Tubes - China Suppliers & Factory Direct Shipping Available
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, Marine & Offshore, Energy & Power, Pulp & Paper, 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
Delivery:
Cold Drawn, Annealed and Pickled / Polished / Bright Annealed / Sand blasting / Shot Blasting
Marking:
Standard, Grade, OD, Thickness, Length, Heat No. (Or as per customer's request)
Packing:
Wooden Boxes, plywood cases, Steel Strips Bundled, or as per request
Specials:
Other sizes and specifications 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 0.065in. [1.65mm] 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 ASTM TP317 stainless steel?
ASTM TP317 refers to a specification for 317 stainless steel (UNS S31700), which is a molybdenum-bearing austenitic stainless steel. It is designed to offer enhanced corrosion resistance, especially in acidic and chloride-rich environments compared to standard grades like 316.
What are the primary applications for TP317 stainless steel?
Due to its superior chemical resistance, TP317 is widely used in chemical and petrochemical processing, marine and offshore environments, energy and power generation, pulp and paper manufacturing, and the medical or pharmaceutical industries.
How does TP317 compare to TP316 stainless steel?
TP317 contains a higher concentration of molybdenum (3–4%) compared to TP316 (2–3%). This increased molybdenum level significantly improves its resistance to pitting and crevice corrosion in aggressive chemical and marine settings.
Is TP317 stainless steel easy to weld?
Yes, TP317 is compatible with standard welding processes, including TIG and MIG. However, to restore its optimal corrosion resistance in critical applications, post-weld annealing is highly recommended.
What standard specifications apply to TP317 tubes and pipes?
TP317 is commonly manufactured and certified under standards such as ASTM A269 (for general service tubing) and ASTM A213 (for boiler, superheater, and heat-exchanger tubes).