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SAE8640 Alloy Steel Round Bar with Polished Surface and High Hardenability for Tool and Mold Applications

Cantidad de orden mínima	1 tonelada
Precio	US $850-1,350 / Ton

Datos del producto

Modelo NO.	8640	Tratamiento superficial	Pulido
Tipo de aleación	Aleación	Rango de diámetro	DE 6-630 mm
Capacidad de producción	500TONELADAS	Contenido de carbono	0.17-0.23
Contenido de silicio	0.17 a 0.37	Contenido del manganeso	0.6-0.95
Contenido de fósforo	≤ 0035	Contenido de azufre	≤ 0035
contenido del cromo	0.4-0.7	Contenido de molibdeno	0.20-0.30
Resistencia a la tracción	≥980(100)MPa	Fuerza de producción	≥785(80)MPa
Alargamiento	el ≥9%
Resaltar	SAE8640 Steel Round Bar , Polished Surface Alloy Steel Bar , High Hardenability SAE8640 Steel Bar

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Descripción de producto

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.

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