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Q390B Q390D hot rolled round bar high strength low alloy steel
Q390B-Q390D hot rolled steel round bars are high-strength low-alloy structural steels under GB/T1591. They offer excellent mechanical properties with yield strengths up to 390 MPa. Available in black, peeled, turned, or ground surfaces via hot rolling or forging techniques. Q390D grade includes low-temperature impact testing at -20°C. Custom cutting and welding services are available.
ASTM: A572 Gr.50JIS: SM490GB: Q390
MaterialGB/T1591 / ASTM / DIN / JIS
ThicknessN/A (Round Bar)
Width50mm - 600mm
Length6000mm or as required / 1000-6000mm
MOQ1 Ton
Lead Time5-30 days
PortTianjin / Shanghai
Response within 24 hours
In Stock — Ready to Ship
| Material Grade | GB/T1591 / ASTM / DIN / JIS | Standard | GB/T1591 / ASTM / DIN / JIS |
| Thickness Range | N/A (Round Bar) | Width Range | 50mm - 600mm |
| Length Range | 6000mm or as required / 1000-6000mm | MOQ | 1 Ton |
| Lead Time | 5-30 days | Port of Shipment | Tianjin / Shanghai |
| C | ≤0.20 | Si | ≤0.55 |
| Mn | 1.00-1.60 | P | ≤0.040 |
| S | ≤0.040 | V | 0.02-0.20 |
| Nb | 0.015-0.060 | Ti | 0.02-0.20 |
| Cr | ≤0.30 | Ni | ≤0.70 |
| Yield Strength | ≥390 MPa | Tensile Strength | 490-650 MPa |
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