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SAE 8620 Alloy Steel Round Bar with High Hardenability, Good Weldability, and OD 6-630mm for Industrial Applications

Minimum Order Quantity	1 Ton
Price	US $750-1,150 / Ton

Product Details

Model NO.	SNCM220	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
Copper Content	≤0.30	Tensile Strength	≥980(100) MPa
Yield Strength	≥785(80) MPa
Highlight	High Hardenability Alloy Steel Round Bar , Good Weldability SAE 8620 Round Bar , OD 6-630mm 1.6523 Steel Bar

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Product Description

Alloy AISI SAE 8620 Steel 1.6523 21NiCrMo2 Sncm220 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 without fragility after tempering

International Standards Equivalents

Chinese (GB)	American (AISI)	German (DIN)	Japanese (JIS)
20CrNiMo	SAE 8620	1.6523	/

Chemical Composition

Element	Content Range (%)
Carbon (C)	0.17-0.23
Silicon (Si)	0.17-0.37
Manganese (Mn)	0.6-0.95
Phosphorus (P)	≤0.035
Sulfur (S)	≤0.035
Chromium (Cr)	0.4-0.7
Molybdenum (Mo)	0.20-0.30
Copper (Cu)	≤0.30

Mechanical Properties

Heat Treatment:
Quenching Temperature: 850°C (oil cooled)
Tempering: 200°C (air cooled)

Property	Value
Tensile Strength (σb)	≥980 MPa (100 kgf/mm²)
Yield Strength (σs)	≥785 MPa (80 kgf/mm²)
Elongation (δ5)	≥9%
Reduction of Area (ψ)	≥40%
Impact Energy (Akv)	≥47 J

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.

Carburized gears and pinions

Shafts and bearings

Piston rings and ring gears

Crankshafts and transmission components

Available Stock Sizes

Round Bar Diameter: 12-380mm

Material Conditions & Forms

Available in various forms including round bars, flat bars, plates, and blocks. Material conditions range from pre-hardened, hot rolled, annealed, to quenched and tempered. Surface conditions include black, pre-machined, grinding, and polished finishes.

Quality Assurance

We source materials exclusively from government-owned steel mills to ensure consistent quality and reliability. Our ISO 9001 certified quality management system undergoes regular audits and recertification to maintain the highest standards.

Our Services

Quality special steel for all industrial applications

Orders of any size and length with fast shipping

Unique inventory of specialty steel products

Value-added services: metal cutting, sizing, machining (blanking, milling, grinding), and heat treatment

Sawing services for small or large quantities

Excellent customer service and support

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