AISI / SAE steel grades
1018, 4140, 304, 316 … with UNS numbers. Issued by SAE International. 16 grades and 5 standards are documented so far; each grade links to a full data sheet and a graded cross-reference to the other systems.
Carbon steel
Spring steel
| Grade | No. | Type | C % | Yield MPa | Tensile MPa | Standard |
|---|---|---|---|---|---|---|
| 1095 | G10950 | High-carbon steel (spring / knife / blade steel) | 0.9 – 1.03 | ≈ 380 | ≈ 650 | ASTM A29 |
Stainless steel
| Grade | No. | Type | C % | Yield MPa | Tensile MPa | Standard |
|---|---|---|---|---|---|---|
| 17-4 PH | S17400 | Martensitic precipitation-hardening stainless steel | ≤ 0.07 | ≈ 760 (typ.) | ≈ 1030 (typ.) | ASTM A564 |
| 2205 | S32205 | Ferritic-austenitic (duplex) stainless steel | ≤ 0.03 | ≥ 450 | ≥ 655 | ASTM A240 |
| 304 | S30400 | Austenitic chromium-nickel stainless steel | ≤ 0.08 | ≥ 205 | ≥ 515 | ASTM A240 |
| 310 | S31000 | Austenitic heat-resisting stainless steel (25 % Cr, 20 % Ni) | ≤ 0.25 | ≥ 205 | ≥ 515 | ASTM A240 |
| 316 | S31600 | Austenitic chromium-nickel-molybdenum stainless steel | ≤ 0.08 | ≥ 205 | ≥ 515 | ASTM A240 |
| 321 | S32100 | Austenitic Cr-Ni stainless steel, titanium-stabilized | ≤ 0.08 | ≥ 205 | ≥ 515 | ASTM A240 |
| 410 | S41000 | Martensitic chromium stainless steel, hardenable | ≤ 0.15 | ≥ 275 | ≥ 485 | ASTM A276 |
| 430 | S43000 | Ferritic chromium stainless steel | ≤ 0.12 | ≥ 205 | ≥ 450 | ASTM A240 |
Alloy steel
| Grade | No. | Type | C % | Yield MPa | Tensile MPa | Standard |
|---|---|---|---|---|---|---|
| 4130 | G41300 | Chromium-molybdenum low-alloy steel, weldable (chromoly) | 0.28 – 0.33 | ≈ 360 | ≈ 560 | ASTM A29 |
Quenched & tempered steel
Bearing steel
| Grade | No. | Type | C % | Yield MPa | Tensile MPa | Standard |
|---|---|---|---|---|---|---|
| 52100 | G52986 | High-carbon chromium bearing steel | 0.93 – 1.05 | ≈ 450 | ≈ 680 | ASTM A295 |
Case-hardening steel
| Grade | No. | Type | C % | Yield MPa | Tensile MPa | Standard |
|---|---|---|---|---|---|---|
| 8620 | G86200 | Nickel-chromium-molybdenum case-hardening steel | 0.18 – 0.23 | ≈ 385 | ≈ 540 | ASTM A29 |
AISI / SAE standards
- ASTM A240 — Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
- ASTM A276 — Standard Specification for Stainless Steel Bars and Shapes
- ASTM A29 — Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
- ASTM A295 — Standard Specification for High-Carbon Anti-Friction Bearing Steel
- ASTM A564 — Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes
Cross-references to other systems
Every AISI / SAE grade page carries a table of equivalents rated identical / near / functional with the reason. Browse other systems: EN (European) · ASTM / ASME · JIS (Japan) · GB/T (China) · DIN (superseded German) · BS (superseded British) · GOST (Russia/CIS) · IS (India).