Grades of Quality Alloy Steel We Supply
Alloy steel is steel that is alloyed with a variety of elements in total amounts between 1.0% and 50% by weight.Common elements that are added to make alloy steel are Molybdenum, Manganese, Nickel, Silicon, Aluminium, Chromium, and Vanadium,they are used to improve its mechanical or physical properties. To achieve some of these improved properties,such as strength,hardness,toughness,hardenability and so on, the steel usually require heat treating.
Principal effects of major alloying elements for steel
| Element | Percentage | Primary function |
| Silicon | 0.2–0.7 | Increases strength |
| 2 | Spring steels | |
| Higher percentages | Improves magnetic properties | |
| Manganese | 0.25–0.40 | Combines with sulfur and with phosphorus to reduce the brittleness. Also helps to remove excess oxygen from molten steel. |
| >1 | Increases hardenability by lowering transformation points and causing transformations to be sluggish | |
| Chromium | 0.5–2 | Increases hardenability |
| 4–18 | Increases corrosion resistance | |
| Nickel | 2–5 | Toughener |
| 12–20 | Increases corrosion resistance | |
| Molybdenum | 0.2–5 | Stable carbides; inhibits grain growth. Increases the toughness of steel |
| Sulfur | 0.08–0.15 | Free-machining properties |
| Aluminium | 0.95–1.30 | Alloying element in nitriding steels |
Fuhong Steel stocks a wide variety of alloy steel bar products.Contact our staff to select the product that is right for your application.
| AISI / SAE | GB | DIN(W-Nr.) | BS | JIS / KS |
| A182 Grade F11 | 12CrMo | 13CrMo44(1.7335) | - | - |
| - | 15CrMo | 16CrMo44(1.7337) | - | SCM415 |
| 4130 | 30CrMo | 25CrMo4(1.7218) | 708A25 / 708M25 | SCM430 |
| 4135 | 35CrMo | 34CrMo4 (1.7220) | - | SCM435 |
| 4140 | 42CrMo | 42CrMo4(1.7225) | 708M40 / EN19 | SCM440 |
| 4145 | - | 50CrMo4(1.7228 | - | SCM445 |
| 4340 | 40CrNiMo | 34CrNiMo6(1.6582) | 817M40 /EN24 | SNCM447 |
| 5115 | 15Cr | 16MnCr5(1.7131) | - | SCr415 |
| 5120 | 15CrMn | 20MnCr5(1.7147) | - | SCr240 |
| 5140 | 40Cr | 41Cr4(1.7035) | 530M40 | SCr440 |
| 8620 | 20CrNiMo | 20NiCrMo2-2(1.6523) | 805M20 | SNCM220 |
| 9840 | - | 36CrNiMo4(1.6511) | 817A37 / 817M37 | SNCM439 |
| - | - | 41CrAlMo7(1.8509) | EN41B/905M39 | SACM645 |
| - | - | 17CrNiMo6 /18CrNiMo7-6(1.6587) | - | - |
| - | - | 15CrNi6(1.5919) | - | - |
| - | - | 17CrNi6 (1.5918) | - | - |
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