About SUS316L
SUS316L is the JIS name for low carbon 316 stainless steel. Carbon is held to 0.03% max, so weld areas stay resistant to intergranular corrosion without post-weld annealing. The 2-3% molybdenum gives better pitting resistance than 304 in chloride and acid service. It is austenitic and cannot be hardened by heat treatment.
Equivalent Grades
| JIS | AISI / UNS | EN | ASTM Forging Spec |
|---|---|---|---|
| SUS316L | 316L / S31603 | 1.4404 (X2CrNiMo17-12-2) | A182 F316L |
SUS316L Forgings We Make
- Forged rings, rolled rings
- Forged flanges
- Forged round bars
- Forged discs
- Forged shafts, eccentric shafts
- Forged sleeves, bushings
- Forged tube sheets
- Forged tubes, pipes
- Forged nozzles, manifolds
- Valve bodies, stems, seat rings
- Forged gears, spindles
- Forged wheels, rolls
Everything is made to your drawing or sizes. More on our forged round bars, forged pipes and other forged products.
Chemical Composition, ASTM A182 F316L (%)
| C | Mn | Si | P | S | Cr | Mo | Ni | N |
|---|---|---|---|---|---|---|---|---|
| 0.030 max | 2.00 max | 0.75 max | 0.045 max | 0.030 max | 16.0-18.0 | 2.0-3.0 | 10.0-14.0 | 0.10 max |
Mechanical Properties, Annealed (min.)
| Standard | Tensile Strength | Yield Strength 0.2% | Elongation | Hardness |
|---|---|---|---|---|
| ASTM A182 F316L | 70 ksi (485 MPa) | 25 ksi (170 MPa) | 40% | 217 HB / 95 HRB max |
| JIS G4303 SUS316L | 480 MPa | 175 MPa | 40% | Per standard |
Melting, Heat Treatment and Testing
Melting
EAF + VOD + ESR (electric arc furnace, vacuum oxygen decarburization, electroslag remelting).
Heat Treatment
Solution annealing: 1010-1120 °C, fast cool in air or water. For best corrosion resistance we finish the anneal above 1070 °C.
Stress relieving: 200-400 °C, air cool.
Testing and Certificates
UT to EN10228-3, SEP1921 or ASTM A388. Mill certificate EN10204 3.1, or 3.2 with third party inspection.
Where Our SUS316L Forgings Are Used
| Industry | Equipment and Parts |
|---|---|
| Chemical, petrochemical | Pressure vessels, tanks, heat exchangers, piping: bars, shafts, tube sheets, flanges |
| Refining | Catalytic recovery systems, recuperators, polythionic acid service: rings, flanges, pipes |
| Offshore, subsea | Subsea and deepwater oil production: bushings, sleeves, discs |
| Valves | Ball, check, globe, gate and plug valves, strainers: bodies, stems, seat rings, blocks |
| Power, compressors | Turbines, gas and air compressors, gearboxes, generators: rings, spindles, gears |
| Pulp and paper | Digesters, liquor tanks, paper machines: nozzles, pipes, crankshafts |
| Food, pharmaceutical | Processing and storage equipment |
| Waste treatment | Thermal oxidizers: nozzles, eccentric shafts |
FAQ
- What is SUS316L equivalent to?
- AISI 316L / UNS S31603, EN 1.4404 (X2CrNiMo17-12-2), and ASTM A182 F316L for forgings.
- SUS316 or SUS316L?
- 316L has 0.03% max carbon. Less carbide forms at grain boundaries during welding, so welded parts hold up better against intergranular corrosion. If the part will be welded, 316L is the usual choice.
- How do you heat treat SUS316L forgings?
- Solution anneal at 1010-1120 °C, then fast cool in air or water. Final anneal above 1070 °C for best corrosion resistance. Stress relieving is 200-400 °C, air cool.
- What certificates do you supply?
- EN10204 3.1, or EN10204 3.2 with a third party inspector. All forgings are UT tested to EN10228-3, SEP1921 or ASTM A388.
- What do you need for a quote?
- Drawing or dimensions, quantity, and the material standard. Send to sales@steelforgepieces.com or call +86-189-2135-9659.