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ASTM A269/A213 TP317 Stainless Steel Seamless Tubes - China Suppliers & Factory with 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
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 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) | ||||
| ATSM A269 TP317 | 90 | 192 | |||
| ATSM 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
What is the difference between ASTM TP317 and 316 stainless steel?
ASTM TP317 contains a higher molybdenum content (3-4%) compared to 316 stainless steel (2-3%). This increase in molybdenum provides superior corrosion resistance, especially against pitting and crevice corrosion in chloride-rich and marine environments.
What are the primary applications of TP317 stainless steel?
TP317 is widely used in demanding industries such as chemical and petrochemical processing, marine and offshore applications, energy and power generation, pulp and paper manufacturing, and medical or pharmaceutical equipment where high corrosion resistance is required.
What standard specifications does TP317 follow for pipes and tubes?
It typically follows the ASTM A269 and ASTM A213 standards, which cover seamless and welded austenitic stainless steel tubing for general service and boiler/superheater/heat-exchanger applications.
Is TP317 stainless steel weldable?
Yes, TP317 has good weldability and can be welded using standard methods like TIG and MIG. However, post-weld annealing is highly recommended for critical applications to restore its optimal corrosion resistance.
What inspections are performed on TP317 seamless pipes?
Standard quality assurances include 100% PMI (Positive Material Identification) testing, EN10204.3.1B Mill Test Certificates, and compliance with third-party inspections to verify chemical composition and mechanical properties.