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20CrNiMo 8620H alloy steel round bar
20CrNiMo (equivalent to AISI 8620H) is a high-quality quenched and tempered alloy structural steel, specifically a low-carbon, low-chromium, molybdenum, nickel case hardening steel. It offers excellent weldability due to its lower carbon content. The material provides good core strength and high surface hardness after carburizing and quenching. Typical hardness in annealed condition is ≤250 HB, while oil quenched tempered hardness can reach 28-34 HRC.
ASTM: AISI 8620 / 8620HDIN: 21NiCrMo2GB: 20CrNiMoJIS: SNCM220
MaterialGB/T 3077 / ASTM A29 / SAE J404
ThicknessN/A (Round Bar)
WidthN/A (Round Bar)
LengthCustom cut lengths available
MOQ1 Ton
Lead Time7-15 days
PortShanghai / Tianjin
Response within 24 hours
In Stock — Ready to Ship
| Material Grade | GB/T 3077 / ASTM A29 / SAE J404 | Standard | GB/T 3077 / ASTM A29 / SAE J404 |
| Thickness Range | N/A (Round Bar) | Width Range | N/A (Round Bar) |
| Length Range | Custom cut lengths available | MOQ | 1 Ton |
| Lead Time | 7-15 days | Port of Shipment | Shanghai / Tianjin |
| C | 0.17-0.23 | Si | 0.17-0.37 |
| Mn | 0.60-0.95 | P | ≤0.035 |
| S | ≤0.035 | Cr | 0.40-0.70 |
| Mo | 0.20-0.30 | Ni | 0.35-0.75 |
| Tensile Strength | ≥530 MPa | Yield Strength | ≥385 MPa |
| Hardness (Annealed) | ≤250 HB |
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