Alloy steels are designated by AISI four-digit numbers. They are more responsive to heat and mechanical treatments than carbon steels. They comprise various types of steels having compositions which exceed the limitations of Va, Cr, Si, Ni, Mo, C and B in the carbon steels.
| Element | Content(%) |
|---|---|
| Iron, Fe | 97.085 - 97.84 |
| Manganese, Mn | 0.750 - 1 |
| Chromium, Cr | 0.7 - 0.9 |
| Carbon, C | 0.560 - 0.640 |
| Phosphorous, P | ≤ 0.0350 |
| Silicon, Si | 0.150 - 0.3 |
| Sulfur, S | ≤ 0.04 |
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength, ultimate | 724 MPa | 105000 psi |
| Tensile strength, yield | 275 MPa | 39900 psi |
| Modulus of elasticity | 190-210 GPa | 27557-30458 ksi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steels) | 80 GPa | 11600 ksi |
| Poissons ratio | 0.27 – 0.30 | 0.27-0.30 |
| Elongation at break (in 50mm) | 17.20% | 17.20% |
| Hardness, Brinell | 197 | 197 |
| Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
| Hardness, Rockwell C (converted from Brinell hardness, value below normal HRC range, for comparison purposes only) | 13 | 13 |
| Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
| Machinability (spheroidized annealed and cold drawn. Based on 100% machinability for AISI 1212 steel) | 55 | 55 |
| Production Route | Hot Rolled, Cold Rolled |
|---|---|
| Material Standard | AISI, ASTM, ASME, DIN, BS, EN, ISO, JIS, GOST, SAE, IS & Custom Chemistry |
| Size | Width from 100mm to 3000mm ; Length from 500mm to 12000mm |
| Thickness | 0.1mm to 400mm |
| Delivery Condition | As Rolled, Annealed, Quenched and Tempered, Normalized |
| Surface Finish | Plain, Brushed, Cladded |
ASTM A29
ASTM A322
ASTM A331
ASTM A505
ASTM A519
ASTM A752
ASTM A829
SAE J1397
SAE J404
SAE J412
SAE J770
1) Structures in Buildings, bridges, railway stations.
2) Fabrication of pipeline components & Industrial equipment.
3) Construction of automotive bodies, warehouses, shipping containers.
4) Commercial appliances, etc.