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40Cr hot rolled alloy steel round bar
40Cr is a high-quality quenched and tempered alloy structural steel with higher tensile and yield strength than No. 45 steel. It features good hardenability, toughness, and plasticity after heat treatment. Suitable for medium-load mechanical parts, gears, shafts, and automotive components. It can be surface hardened via high-frequency or flame quenching.
ASTM: AISI 5140DIN: 1.7035 / 41Cr4JIS: SCr440GB: 40Cr
MaterialGB/T 3077 / DIN 1.7035 / JIS SCr440 / ASTM 5140
ThicknessN/A (Round Bar)
WidthN/A (Round Bar)
Length6000-12000 mm
MOQ1 Ton
Lead Time7-15 days
PortShanghai / Tianjin
Response within 24 hours
In Stock — Ready to Ship
| Material Grade | GB/T 3077 / DIN 1.7035 / JIS SCr440 / ASTM 5140 | Standard | GB/T 3077 / DIN 1.7035 / JIS SCr440 / ASTM 5140 |
| Thickness Range | N/A (Round Bar) | Width Range | N/A (Round Bar) |
| Length Range | 6000-12000 mm | MOQ | 1 Ton |
| Lead Time | 7-15 days | Port of Shipment | Shanghai / Tianjin |
| C | 0.37-0.44 | Si | 0.17-0.37 |
| Mn | 0.50-0.80 | P | ≤0.030 |
| S | ≤0.030 | Cr | 0.80-1.10 |
| Tensile Strength | ≥980 MPa | Yield Strength | ≥785 MPa |
| Hardness | ≤250 HB |
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