ASTM A182 F316 / A182M F316L
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ASTM A182 F316 and F316L are forged austenitic stainless steels commonly used for flanges, fittings, valves, and other pressure-containing parts in high-temperature and corrosive environments. These materials offer excellent resistance to corrosion, good mechanical strength, and reliable weldability, making them ideal for chemical processing, offshore, and food industries.
ASTM A182 F316 / A182M F316L.pdf
What Is ASTM A182 F316 / F316L?
ASTM A182 F316 is a molybdenum-bearing stainless steel known for its superior corrosion resistance and strength. Its low-carbon version, F316L, is specifically designed to minimize the risk of intergranular corrosion after welding, making it ideal for welded pressure systems.
Key Differences Between F316 and F316L
| Property | F316 | F316L |
|---|---|---|
| Carbon Content | ≤ 0.08% | ≤ 0.03% |
| Weldability | Good | Excellent |
| Intergranular Corrosion Resistance | Good | Excellent (after welding) |
| Mechanical Strength | Slightly higher | Slightly lower |
A182 F316 / F316L Chemical Composition (% by weight)
| Element | F316 | F316L |
|---|---|---|
| C | ≤ 0.08 | ≤ 0.03 |
| Cr | 16.0 – 18.0 | 16.0 – 18.0 |
| Ni | 10.0 – 14.0 | 10.0 – 14.0 |
| Mo | 2.0 – 3.0 | 2.0 – 3.0 |
| Mn, Si, P, S | As per standard | As per standard |
A182 F316 / F316L Mechanical Properties
| Property | F316 | F316L |
|---|---|---|
| Yield Strength | ≥ 205 MPa | ≥ 170 MPa |
| Tensile Strength | ≥ 515 MPa | ≥ 485 MPa |
| Elongation | ≥ 30% | ≥ 30% |
| Hardness (Brinell) | ≤ 217 HB | ≤ 217 HB |
A182 F316 / F316L Range & Specifications
Forged Fittings: Socket weld & threaded types (1/8" to 4")
Flanges: Weld neck, slip-on, blind, threaded, socket weld
Pressure Ratings: Class 150#, 300#, 600#, 900#, 1500#, 2500#
Standards: ASME B16.5, MSS-SP-79/83/95, ANSI B16.11
What is the difference between ASTM A182 and A240?
ASTM A182 is for forged components like flanges and fittings; A240 is for flat-rolled stainless steel plate and sheet.
Can ASTM A182 F316L be welded without post-weld heat treatment?
Yes. Its low carbon content (≤0.03%) helps avoid carbide precipitation, reducing the risk of intergranular corrosion.
Which is better, F316 or F316L?
F316 has higher strength, while F316L offers better weldability and corrosion resistance after welding.
