SteelAlloyDesignationSystemChart.pdf
| Steel Alloy Designation System | |
| AISI-SAE Designation Number | Type and Description |
| Carbon Steels | |
| 10xx | Plain Carbon (Mn. 1.00% max.) |
| 11xx | Resulfurized |
| 12xx | Resulfurized and rephosphorized |
| 15xx | Plain Carbon (max. Mn. Range 1.00 – 1.65%) |
| Manganese steels | |
| 13xx | Mn 1.75 |
| Nickel steels | |
| 23xx | Ni 3.50 |
| 25xx | Ni 5.00 |
| Nickel-chromium steels | |
| 31xx | Ni 1.25; Cr 0.65, 0.80 |
| 32xx | Ni 1.75; Cr 1.07 |
| 33xx | Ni 3.50; Cr 1.50, 1.57 |
| 34xx | Ni 3.00; Cr 0.77 |
| Molybdenum steels | |
| 40xx | Mo 0.20, 0.25 |
| 44xx | Mo 0.40, 0.52 |
| Chromium-molybdenum steels | |
| 41xx | Cr 0.50, 0.80, 0.95; Mo 0.12, 0.20, 0.25, 0.30 |
| Nickel-chromium-molybdenum steels | |
| 43xx | Ni 1.82; Cr 0.50, 0.80; Mo 0.25 |
| 43BVxx | Ni 1.82; Cr 0.50; Mo 0.12, 0.25; V 0.03 min. |
| 47xx | Ni 1.05; Cr 0.45; Mo 0.20, 0.35 |
| S1xx | Ni 0.30; Cr 0.40; Mo 0.12 |
| 86xx | Ni 0.55; Cr 0.50; Mo 0.20 |
| 87xx | Ni 0.55; Cr 0.50; Mo 0.25 |
| 88xx | Ni 0.55; Cr 0.50; Mo 0.35 |
| 93xx | Ni 3.25; Cr 1.20; Mo 0.12 |
| 94xx | Ni 0.45; Cr 0.40; Mo 0.12 |
| 97xx | Ni 1.00; Cr 0.20; Mo 0.20 |
| 98xx | Ni 1.00; Cr 0.80; Mo 0.25 |
| Nickel-molybdenum steels | |
| 46xx | Ni 0.85, 1.82; Mo 0.20, 0.25 |
| 48xx | Ni 3.50; Mo 0.25 |
| 50xx | Cr 0.27, 0.40, 0.50, 0.65 |
| 51xx | Cr 0.80, 0.87, 0.92, 0.95, 1.00, 1.05 |
| 50xxx | Cr 0.50; C 1.00 min. |
| 51xxx | Cr 1.02; C 1.00 min. |
| 52xxx | Cr 1.45; C 1.00 min. |
| Chromium-vanadium steels | |
| 61xx | Cr 0.60, 0.80, 0.95; V 0.10, 0.15 |
| Tungsten-chromium steels | |
| 92xx | Si 1.40, 2.00; Mn 0.65, 0.82, 0.85; Cr 0.00, 0.65 |
| Silicon-manganese steels | |
| 92xx | Si 1.40, 2.00; Mn 0.65, 0.82, 0.85; Cr 0.00, 0.65 |
| High-strength low-alloy steels | |
| 9xx | Various SAE grades |
| Boron steels | |
| xxBxx | B denotes boron steels |
| Leaded steels | |
| xxLxx | L denotes leaded steels |