Canonical Metallurgy Classification • 19 Verified Alloys
Stainless Steel
Stainless steels grouped by metallurgical family; source-specific chemistry and processing conditions remain attached to each grade.
Subfamily Classifications (4)
19 Alloys in Stainless SteelFact-Level Source Provenance
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| UNS • Canonical Grade | Subfamily | Standard Identifiers | Conductivity (% IACS) | Yield & Context | Status | Actions |
|---|---|---|---|---|---|---|
| Type 416 Stainless Steel | Martensitic | UNS: S41600 | — | — | VERIFIED | |
| 17-4 PH (630) Stainless Steel | Precipitation Hardening | COMMERCIAL: 17-4 PHTYPE: 630UNS: S17400 | — | 1275.5 MPaTYPICAL · H900 · Bar · LONGITUDINAL · Typical longitudinal bar properties; section dimensions and test temperature not stated in this table. Not minimum requirements. | VERIFIED | |
| 409 Stainless Steel | Ferritic | TYPE: 409UNS: S40920SPECIFICATION: 409 Stainless Steel Engineering Datasheet | — | ≥ 170 MPaMINIMUM · Annealed · Sheet and Strip | VERIFIED | |
| 201 Stainless Steel | Austenitic | TYPE: 201SPECIFICATION: 201 Stainless Steel Engineering Datasheet | — | ≥ 310 MPaMINIMUM · Annealed · Sheet and Strip | VERIFIED | |
| 202 Stainless Steel | Austenitic | TYPE: 202SPECIFICATION: 202 Stainless Steel Engineering Datasheet | — | ≥ 310 MPaMINIMUM · Annealed · Sheet and Strip | VERIFIED | |
| 301 Stainless Steel | Austenitic | TYPE: 301SPECIFICATION: 301 Stainless Steel Engineering Datasheet | — | ≥ 276 MPaMINIMUM · Annealed · Sheet and Strip | VERIFIED | |
| 302 Stainless Steel | Austenitic | TYPE: 302SPECIFICATION: 302 Stainless Steel Engineering Datasheet | — | ≥ 205 MPaMINIMUM · Annealed · Sheet and Strip | VERIFIED | |
| 303 Stainless Steel | Austenitic | TYPE: 303SPECIFICATION: 303 Stainless Steel Engineering Datasheet | — | ≥ 205 MPaMINIMUM · Cold Finished Annealed Bar · Bar | VERIFIED | |
| 304 Stainless Steel | Austenitic | TYPE: 304UNS: S30400SPECIFICATION: 304 Stainless Steel Engineering Datasheet | — | ≥ 206.8 MPaMINIMUM · ASTM requirements (producer sheet) · Plate · Separate ASTM grade column in producer datasheet; heat treatment and thickness applicability not stated for these requirements. Typical 0.375-inch plate column is not reused as a guarantee. | VERIFIED | |
| 304L Stainless Steel | Austenitic | TYPE: 304LUNS: S30403SPECIFICATION: 304L Stainless Steel Engineering Datasheet | — | ≥ 172.4 MPaMINIMUM · ASTM requirements (producer sheet) · Plate · Separate ASTM grade column in producer datasheet; heat treatment and thickness applicability not stated for these requirements. Typical 0.375-inch plate column is not reused as a guarantee. | VERIFIED | |
| 305 Stainless Steel | Austenitic | TYPE: 305SPECIFICATION: 305 Stainless Steel Engineering Datasheet | — | ≥ 170 MPaMINIMUM · Annealed · Sheet and Strip | VERIFIED | |
| 309 Stainless Steel | Austenitic | TYPE: 309SPECIFICATION: 309 Stainless Steel Engineering Datasheet | — | ≥ 205 MPaMINIMUM · Annealed · Plate, Sheet and Strip | VERIFIED | |
| 310 Stainless Steel | Austenitic | TYPE: 310SPECIFICATION: 310 Stainless Steel Engineering Datasheet | — | ≥ 205 MPaMINIMUM · Annealed · Plate, Sheet and Strip | VERIFIED | |
| 316 Stainless Steel | Austenitic | TYPE: 316UNS: S31600SPECIFICATION: 316 Stainless Steel Engineering Datasheet | — | ≥ 206.8 MPaMINIMUM · ASTM requirements at room temperature (producer sheet) · Plate · Separate ASTM grade column in producer datasheet; heat treatment and thickness applicability not stated for these requirements. Typical 0.375-inch plate column is not reused as a guarantee. Source specifies room temperature without a numeric temperature. | VERIFIED | |
| 316L Stainless Steel | Austenitic | TYPE: 316LUNS: S31603SPECIFICATION: 316L Stainless Steel Engineering Datasheet | — | ≥ 172.4 MPaMINIMUM · ASTM requirements at room temperature (producer sheet) · Plate · Separate ASTM grade column in producer datasheet; heat treatment and thickness applicability not stated for these requirements. Typical 0.375-inch plate column is not reused as a guarantee. Source specifies room temperature without a numeric temperature. | VERIFIED | |
| 321 Stainless Steel | Austenitic | TYPE: 321SPECIFICATION: 321 Stainless Steel Engineering Datasheet | — | ≥ 205 MPaMINIMUM · Annealed · Plate, Sheet and Strip | VERIFIED | |
| 347 Stainless Steel | Austenitic | TYPE: 347SPECIFICATION: 347 Stainless Steel Engineering Datasheet | — | ≥ 205 MPaMINIMUM · Annealed · Plate, Sheet and Strip | VERIFIED | |
| 410 Stainless Steel | Martensitic | TYPE: 410SPECIFICATION: 410 Stainless Steel Engineering Datasheet | — | ≥ 205 MPaMINIMUM · Annealed · Bar and Sheet | VERIFIED | |
| 420 Stainless Steel | Martensitic | TYPE: 420SPECIFICATION: 420 Stainless Steel Engineering Datasheet | — | ≥ 345 MPaMINIMUM · Annealed · Bar and Strip | VERIFIED |
Verified Stainless Steel Comparison Pairs (3)
Open Compare Engine →316vs316L
Compare source-specific carbon limits and plate mechanical requirements; the low-carbon grade remains a distinct identity, not an automatic substitute.
304vs316L
Tradeoff between baseline austenitic stainless cost and pharmaceutical / welded marine service longevity.
304vs304L
Compare source-specific carbon limits and plate mechanical requirements; the low-carbon grade remains a distinct identity, not an automatic substitute.