Raw Material Specification
Chemical composition of Steel for Oil Hardened & Tempered Steel Wire - Alloyed
| Grade | 1 |
|---|---|
| Carbon % | 0.50 - 0.60 |
| Silicon % | 1.20 - 1.60 |
| Manganese % | 0.50 - 0.80 |
| Sulphur Max. % | 0.025 |
| Phosphorus Max. % | 0.025 |
| Chromium % | 0.50 - 0.60 |
| Vanadium % | - |
Chemical Composition of stainless Spring Steel Wire for Normal Corrosion Resistance
| Grade | 1 | 2 |
|---|---|---|
| Carbon % | 0.15 | 0.09 |
| Silicon % | 1.00 | 1.00 |
| Manganese % | 2.00 | 1.00 |
| Sulphur Max. % | 0.030 | 0.030 |
| Phosphorus Max. % | 0.045 | 0.040 |
| Chromium % | 17.0 - 19.0 | 16.0 - 18.0 |
| Vanadium % | - | 0.75 - 1.25 |
| Nickel % | 8.0 - 10.0 | 6.75 - 7.75 |
Chemical Composition of Steel Patented and Cold Drawn Steel Wire - Unalloyed
| Grade | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| Carbon % | 0.50 - 0.75 | 0.60 - 0.85 | 0.75 - 1.0 | 0.75 - 1.0 |
| Silicon % | 0.10 - 0.35 | 0.10 - 0.35 | 0.10 - 0.35 | 0.10 - 0.35 |
| Manganese % | 1.00 | 0.80 | 0.80 | 0.80 |
| Sulphur Max. % | 0.050 | 0.040 | 0.030 | 0.025 |
| Phosphorus Max. % | 0.040 | 0.040 | 0.030 | 0.025 |
| Sulphur + Phosphorus Max. % | - | - | 0.050 | 0.040 |
| Copper Max. % | 0.20 | 0.20 | 0.12 | 0.12 |
Chemical Composition of Phosphor Bronze Wires
| Grade | 1 | 2 |
|---|---|---|
| Tin % | 4.20 - 5.50 | 5.50 - 7.50 |
| Phosphorus % | 0.02 - 0.40 | 0.02 - 0.40 |
| Lead % | 0.50 | 0.50 |
| Total Impurities Max. % | 0.20 | 0.20 |
| Copper % | 0.025 | 0.025 |
| Chromium % | Remainder | Remainder |
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