317L
Stainless steel grade 317L is a low carbon version of grade 317 stainless steel. It has the same high strength and corrosion resistance as 317 steel but can produce stronger welds due to the low carbon content.
| USA | JP | DE | EUR | CN |
|---|---|---|---|---|
| ASTM | JIS | DIN | EN | GB |
| 317L | SUS317L | X2CrNiMo 18-15-4 | 1.4438 | 022Cr19Ni13Mo3 |
Chemical Composition
The typical chemical composition is shown in the table below.
| Grade | Standard | 317L Chemical Composition | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | Cr | Ni | P | S | Mo | Others | ||
| ≤ % | ≤ % | % | % | % | ≤ % | ≤ % | ≤ % | % | ||
| 317L | ASTM A240 | 0.03 | 0.75 | 2.0 | 18.0 - 20.0 | 11.0 - 15.0 | 0.045 | 0.03 | 3.0 - 4.0 | N≤ 0.10 |
| 1.4438 | EN 10088-2 | 0.03 | 1.0 | 2.0 | 17.5 - 19.5 | 13.0 - 16.0 | 0.045 | 0.015 | 3.0 - 4.0 | N≤ 0.10 |
| SUS317L | JIS G 4304 | JIS G 4305 | 0.03 | 1.0 | 2.0 | 18.0 - 20.0 | 11.0 - 15.0 | 0.045 | 0.03 | 3.0 - 4.0 | - |
Mechanical Properties
The mechanical properties are given in the table below.
| Grade | Standard | 317L Mechanical Properties | ||||
|---|---|---|---|---|---|---|
| Tensile Strength | Yield Strength 0.2% | Elongation >% | Hardness | |||
| (MPa) ≥ | (MPa) ≥ | HRB ≤ | HB ≤ | |||
| 317L | ASTM A240 | 515 | 205 | 40 | 95 | 217 |
| 1.4438 | EN 10088-2 | 500 | 200 | 35 | 95 | 215 |
| SUS317L | JIS G 4304 | JIS G 4305 | 480 | 175 | 40 | 90 | 187 |
Properties & Typical Applications
317L, compared with conventional stainless steel, has higher ductility, stress corrosion resistance, compressive strength and high temperature resistance. It is low carbon grade or L grade, which is resistant to sensitization during welding and heat treatment. It’s mainly used in large-caliber butterfly valve parts, butterfly valve shaft, butterfly valve sleeve, internal flow fasteners, etc.