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High strength quenched and tempered structural steel. It has high strength and toughness, high hardenability, medium cold deformation plasticity, and good machinability. There is a tendency of temper brittleness, and the transverse impact toughness is poor. The welding performance is good, but when the thickness is greater than 3mm, it should be preheated to 150 ℃ first, and heat treatment is required after welding. Use after general tempering
Supply Form & Size
Form of Supply | Size(mm) | Length(mm) |
Round bar | 6.0mm-1200mm | 2.5m-10m |
Chemical Composition&Related Specifications
Grade | C | Si | Mn | Cr |
30CrMnSi | 0.28~0.34 | 0.90~1.20 | 0.80~1.10 | 0.80~1.10 |
Brand comparison table
AISI/SAE | DIN/EN | BS | JIS/KS | China |
/ | / | / | / | 30CrMnSi |
Mechanical Property
tensile strength σb (MPa) | ≥1100 |
yield strength σs (MPa | ≥800 |
elongation δ5 (%) | ≥10 |
Reduction of area ψ (%) | ≥45 |
Impact absorbed energy(Aku2/J) | ≥50 |
Brinell hardness(HBS100/3000) | ≤229 |