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ASTM A269/270/213 TP316L Stainless Steel Seamless Tubes - China Suppliers & Factory Stock for Fast Delivery
Introduction
ASTM A269 TP316L is the low-carbon variant of TP316, designed to eliminate intergranular corrosion (IGC) risks in welded components and sensitized structures. With a carbon content ≤0.035%, it avoids chromium carbide precipitation at grain boundaries, making it ideal for applications where post-weld heat treatment is impractical or corrosive conditions are extremely severe. The inclusion of 2.0–3.0% molybdenum (Mo) ensures superior resistance to pitting, crevice corrosion, and chemical attack, similar to TP316 but with enhanced weldability for critical environments.
Key Features
Low-Carbon Immunity to Intergranular Corrosion (IGC):
Carbon ≤0.035% means no chromium carbide (Cr23C6) precipitates at grain boundaries, even after welding or long-term exposure to sensitization temperatures. No post-weld heat treatment is required for most applications, reducing fabrication costs.
Molybdenum-Enhanced Localized Corrosion Resistance:
Equivalent to TP316 in resistance to pitting/crevice corrosion in chloride environments (e.g., seawater, brine, or bleach solutions), making it suitable for harsh chemical processing.
Superior Weldability:
Ideal for welded structures (e.g., pipelines, storage tanks) where heat-affected zones (HAZ) would otherwise become IGC-prone in higher-carbon grades. Commonly used in industries where non-destructive testing (NDT) of welds is critical but post-weld annealing is not feasible.
Wide Temperature Range Performance:
Maintains ductility and toughness from cryogenic (−196°C, e.g., liquid nitrogen systems) to high-temperature service (up to ~650°C continuously, ~870°C short-term).
Austenitic Microstructure Purity:
Fully austenitic matrix (no harmful phases like σ-phase) after solution annealing, ensuring uniform corrosion resistance and formability.
Material Specification
Standard: ASTM A269 & A270 & 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)
Applications:
- Sanitary & Hygienic Systems
- Food and Beverage Processing
- Semiconductor & Electronics
- Food & Dairy Plants
- Pharmaceutical Plant
- Maritime & Offshore Applications
- Medical & Laboratory Equipment
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 - TP316L (ASTM A269/A269M)
| HEAT NO. | CHEMICAL COMPOSITION (%) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Ni | Cr | Mo | ||
| STAND. | MIN. | 10.00 | 16.00 | 2.0 | |||||
| MAX. | 0.035B | 2.00 | 0.045 | 0.030 | 1.00 | 15.00 | 18.00 | 3.0 | |
CHEMICAL COMPOSITION - TP316L (ASTM A213 & 270)
| HEAT NO. | CHEMICAL COMPOSITION (%) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Ni | Cr | Mo | ||
| STAND. | MIN. | 10.00 | 16.00 | 2.0 | |||||
| MAX. | 0.035D | 2.00 | 0.045 | 0.030 | 1.00 | 14.00 | 18.00 | 3.0 | |
Mechanical Properties
| 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 TP316L | 90 | 192 | |||
| ATSM A213 TP316L | 485 | 170 | 35 | 90 | 192 |
| ATSM A270 TP316L | 485 | 170 | 35 | B90 | |
Equivalent Grades - (ASTM A269 & A270 & A213 TP316L Equivalent Grades)
| ASTM A269 & A270 & A213 TP316L Equivalent Grades | |||||||
|---|---|---|---|---|---|---|---|
| USA (ASTM / AISI) | Germany (DIN, WNr) | Japan (JIS) | France (AFNOR) | England (BS) | Euronorms (EN) | China (GB) | International (ISO) |
| TP316L 316L S31603 | 1.4404 | SUS316L | Z2CND17-12 | 316S11 | X2CrNiMo17-12-2 | 022Cr17Ni12Mo2 | X2CrNiMo17-12-2 S31603 |
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 |
ASTM A270/A270M Standard Cold Machining Size Deviation Permitted
| ASTM A270/A270M Standard cold machining size deviation permitted | ||||
|---|---|---|---|---|
| Size, Outside Diameter, in. [mm] | Permissible Variations in Outside Diameter, in. [mm] | Permissible Variations in Cut Length, in. [mm] A | ||
| Over | Under | Over | Under | |
| 1.000 [25] and under | 0.005 [0.13] | 0.005 [0.13] | 1/8 [3] | 0 |
| Over 1 [25] to 2 [50] | 0.008 [0.20] | 0.008 [0.20] | 1/8 [3] | 0 |
| Over 2 [50] to 3 [75] | 0.010 [0.25] | 0.010 [0.25] | 1/8 [3] | 0 |
| Over 3 [75] to 4 [100] | 0.015 [0.38] | 0.015 [0.38] | 1/8 [3] | 0 |
| Over 4 [100] to 5 1/2 [140], excl | 0.015 [0.38] | 0.015 [0.38] | 3/16 [5] | 0 |
| 5 1/2 [140] to 8 [200], excl | 0.030 [0.75] | 0.030 [0.75] | 3/16 [5] | 0 |
| 8 [200] to 12 [300] | 0.050 [1.25] | 0.050 [1.25] | 3/16 [5] | 0 |
Frequently Asked Questions (FAQ)
Q1: What makes ASTM A269 TP316L highly resistant to intergranular corrosion?
It features a low carbon content (≤0.035%), which prevents chromium carbide precipitation at the grain boundaries during welding or exposure to high temperatures.
Q2: What is the role of Molybdenum in TP316L stainless steel?
The addition of 2.0–3.0% Molybdenum significantly improves the material's resistance to localized corrosion, such as pitting and crevice corrosion, particularly in chloride-rich environments.
Q3: In which industries is ASTM A269 TP316L commonly used?
It is widely applied in sanitary systems, food and beverage processing, semiconductor manufacturing, pharmaceutical plants, marine applications, and medical equipment.
Q4: Does ASTM A269 TP316L require post-weld heat treatment?
No, post-weld heat treatment is generally not required because its low-carbon formulation eliminates the risk of sensitization during the welding process.
Q5: What inspections are standard for these tubes?
The standard inspections include 100% PMI (Positive Material Identification) testing, EN10204.3.1B mill test certification, and optional third-party inspections.
Q6: What delivery conditions are available for these stainless steel tubes?
They can be delivered as Cold Drawn, Annealed and Pickled, Polished, Bright Annealed, Sand Blasted, or Shot Blasted.