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SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for Tool and Mold Applications
SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for Tool and Mold Applications
Specifications
MOQ :
1 Ton
Price :
US $850-1,350 / Ton
Model NO. :
8640
Surface Treatment :
Polished
Alloy Type :
Alloy
Diameter Range :
OD 6-630mm
Production Capacity :
500tons
Carbon Content :
0.17-0.23
Silicon Content :
0.17-0.37
Manganese Content :
0.6-0.95
Phosphorus Content :
≤0.035
Sulfur Content :
≤0.035
Chromium Content :
0.4-0.7
Molybdenum Content :
0.20-0.30
Tensile Strength :
≥980(100) MPa
Yield Strength :
≥785(80) MPa
Elongation :
≥9%
Description
SAE8640 Forging Steel Bar - Alloy Steel Round Bar
SAE 8620H Alloy Round Bar is a low carbon nickel chromium molybdenum alloy steel with excellent carburized properties, formability, and weldability. This widely used carburizing alloy offers high strength case and core toughness due to its nickel content, while chromium and molybdenum provide superior surface hardness and wear resistance.
Key Features
  • Excellent machinability performance
  • Superior cold strain plasticity
  • Good weldability characteristics
  • High hardenability properties
International Standards Equivalents
Chinese (GB) American (AISI) German (DIN) Japanese (JIS)
20CrNiMo SAE8620 1.6523 /
Chemical Composition
Grade C Si Mn P S Cr Mo Cu Ni
20CrNiMo 0.17-0.23 0.17-0.37 0.6-0.95 ≤0.035 ≤0.035 0.4-0.7 0.20-0.30 ≤0.30 /
Mechanical Properties
Property Value
Quenching Temperature 850°C (oil cooled)
Tempering 200°C (air cooled)
Tensile Strength σb (MPa) ≥980(100)
Yield Strength σs (MPa) ≥785(80)
Elongation δ5 (%) ≥9
Reduction of Area ψ (%) ≥40
Akv (J) ≥47
Typical Applications
Widely used in transmission systems, tractor motors, and small to medium automotive components. Serves as an alternative to 12CrNi3 for high-class carburization and cyanide carburizing parts including oil drilling equipment, mining claws, and cones. Commonly applied in carburized gears, pinions, shafts, bearings, piston rings, ring gears, and crankshafts.
Available Stock Sizes
Round Bar Diameter: 12-380mm
Material Conditions & Forms
Our steel materials are available in various forms including round bars, flat bars, plates, and blocks. Conditions range from pre-hardened, hot rolled, annealed, quenched and tempered to surface finishes such as black, pre-machined, grinding, and polished.
Quality Assurance & Commitment
Government-Certified Quality
We source materials exclusively from certified steel manufacturers to ensure consistent, high-quality steel products. Our ISO 9001 certified quality management system undergoes regular audits and recertification.
Reliable Delivery
We prioritize timely delivery for all orders, whether raw materials or finished products with machining or heat treatment, ensuring shortest possible lead times.
Comprehensive Services
We provide specialty steel for all industries with value-added services including metal cutting, sizing, machining (blanking, milling, grinding), heat treatment, and sawing for any quantity requirements.
Product Gallery
SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for Tool and Mold Applications SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for Tool and Mold Applications SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for Tool and Mold Applications SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for Tool and Mold Applications SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for Tool and Mold Applications SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for Tool and Mold Applications
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SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for Tool and Mold Applications

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Product Detail
MOQ :
1 Ton
Price :
US $850-1,350 / Ton
Model NO. :
8640
Surface Treatment :
Polished
Alloy Type :
Alloy
Diameter Range :
OD 6-630mm
Contact Supplier
SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for Tool and Mold Applications

JIANGSU MITTEL STEEL INDUSTRIAL LIMITED

Verified Supplier
4 Years
jiangsu, wuxi
Business Type :
Manufacturer, Distributor/Wholesaler, Exporter
Main Products :
stainless steel roofing sheet, Stainless Steel Strip, Others stainless steel sheet
Total Annual :
>1000000
Employee Number :
>100
Certification Level :
Verified Supplier
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