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27SiMn hot rolled alloy steel round bar
27SiMn is a Chinese standard steel grade known for excellent machinability and cold deformation plasticity. It maintains high strength and wear resistance during heat treatment and offers high toughness when water quenched. Widely used for manufacturing hydraulic parts, hot stamping components, and other structural parts in the automobile, petroleum, and chemical industries.
ASTM: JIS: GB: 27SiMn
MaterialGB/T 3077
Thickness8-1200 mm
WidthN/A (Round Bar)
LengthCustom Length
MOQ1 Ton
Lead Time7-15 days
PortShanghai / Tianjin
Response within 24 hours
In Stock — Ready to Ship
| Material Grade | GB/T 3077 | Standard | GB/T 3077 |
| Thickness Range | 8-1200 mm | Width Range | N/A (Round Bar) |
| Length Range | Custom Length | MOQ | 1 Ton |
| Lead Time | 7-15 days | Port of Shipment | Shanghai / Tianjin |
| C | 0.24-0.32 | Si | 1.10-1.40 |
| Mn | 1.10-1.40 | P | ≤0.035 |
| S | ≤0.035 | Cu | ≤0.30 |
| Cr | ≤0.30 | Ni | ≤0.30 |
| Mo | ≤0.15 | Yield Strength | ≥551 MPa |
| Tensile Strength | ≥690 MPa | Elongation | ≥11% |
| Hardness | ≤344 HBW |
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