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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
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- 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 A269/270/213 TP316L Stainless Steel Seamless Tubes from China - Reliable Suppliers and Factory Stock Available
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
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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.
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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.
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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.
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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).
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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)
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Application:
- 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.
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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 immune to intergranular corrosion?
ASTM A269 TP316L features a low carbon content (≤0.035%), which prevents chromium carbide precipitation at grain boundaries during welding or exposure to high temperatures, effectively eliminating the risk of intergranular corrosion (IGC).
Q2: Why is Molybdenum added to TP316L stainless steel?
The steel is alloyed with 2.0–3.0% Molybdenum (Mo) to significantly enhance its localized corrosion resistance. This makes it highly resistant to pitting and crevice corrosion in severe chloride environments like brine, seawater, or chemical processing environments.
Q3: Is post-weld heat treatment necessary for ASTM A269 TP316L?
No, post-weld heat treatment is generally not required. Due to its low-carbon chemistry, it retains immunity to sensitization in the heat-affected zone (HAZ) after welding, saving fabrication time and costs.
Q4: What are the primary applications of ASTM A269 TP316L?
It is widely used in industries requiring high hygiene and corrosion resistance, including sanitary systems, food and beverage processing, semiconductor manufacturing, pharmaceutical plants, marine applications, and medical laboratory equipment.
Q5: What standard testing and inspections are performed on these tubes?
The tubes undergo 100% Positive Material Identification (PMI) testing. They are delivered with EN10204.3.1B Mill Test Certificates, and third-party inspections are accepted to ensure high quality and standard compliance.
Q6: What are the mechanical properties of ASTM A269 TP316L?
ASTM A269 TP316L has a maximum Rockwell hardness of 90 HRB and a maximum Brinell hardness of 192 HBW. For related grades like ASTM A213/A270 TP316L, it provides a minimum tensile strength of 485 MPa, a minimum yield strength of 170 MPa, and a minimum elongation of 35%.