ASTM A269/270/213 TP316L GRADE SS SMLS TUBE
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)
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.
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 & ASTM A270/A270M 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 TubesC | |
| 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]nomina |
| 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 | ||||
| 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 [020] | 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], exdl | 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 |