28SiMnB
Alloy Steel28SiMnB / A76282
28SiMnB grade supplied by Shanxi Youte Steel (jlhsteel.net).
Chemical Composition (%)
| C | 0.24 |
|---|---|
| SI | 0.6 |
| MN | 1.2 |
| P | 0.025 |
| S | 0.02 |
| CR | 0.25 |
| NI | 0.35 |
| CU | 0.2 |
Available Forms
Bar, Plate, Tube, Forging, Wire
Uses
Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Chromium (≈0.25%) improves hardenability, wear and corrosion resistance. Nickel (≈0.35%) increases toughness and impact strength at low temperature. Applied to gears, shafts, bolts, connecting rods, pressure parts and heavy forgings in automotive, energy and machinery sectors.
Heat Treatment
Austenitize at 820–870 °C (oil or water quench depending on section) and temper at 400–650 °C to the required strength/toughness balance.
Precautions
Weldable with standard procedures; preheat may be needed for thick sections or higher-carbon/ alloy grades. Protect from decarburization during heating (controlled atmosphere or protective coating).
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