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Raian Ionescu

Material quality very good. we have cooperate more than 10 Years. They trade lots kinds of steel material. All material quality good. They duty for all material quality. We are planing continue cooperate with them in the future

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Polished Surface High Hardenability Alloy Steel Round Bar OD 6-630mm for Bearing Applications

Minimum Order Quantity	1 Ton
Price	US $690-1,180 / Ton

Product Details

Diameter Range	10-350 Mm	Material Grade	GCr15/SAE52100/100Cr6/EN31/SUJ2
Surface Finish	Polished	Carbon Content	0.95-1.05%
Silicon Content	0.15-0.35%	Manganese Content	0.2-0.45%
Phosphorus Content	≤0.027%	Sulfur Content	≤0.025%
Chromium Content	1.3-1.65%	Quenching Temp	830-850°C
Quench Hardness	62-65 HRC	Tempering Temp	150-190°C
Tempered Hardness	58-62 HRC	Round Bar Length	4000-10000mm
Flat Bar Thickness	8-200mm
Highlight	Polished Surface Steel Round Bar , High Hardenability Alloy Steel Bar , OD 6-630mm Bearing Steel Bar

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Product Description

GCr15 / SAE52100 / EN31 Alloy Steel Round Bar for Bearing Applications

GCr15 is a high carbon chromium bearing steel with optimized alloy content. After quenching and low temperature tempering, it delivers high hardness, uniform microstructure, excellent wear resistance, and superior contact fatigue performance.

Key Features

Widely used high carbon chromium bearing steel with excellent performance and minimal alloy content
High hardenability and comprehensive mechanical properties
Excellent machinability after spheroidizing annealing
High hardness, uniform structure, superior wear resistance, and high contact fatigue performance after quenching and tempering
Outstanding hot working performance

International Standards Equivalents

Chinese (GB)	American (AISI)	German (DIN)	Japanese (JIS)
GCr15	SAE52100	100Cr6/EN31	SUJ2

Chemical Composition

Grade	C	Si	Mn	P	S	Cr	Mo	Cu	Ni
GCr15/52100	0.95-1.05	0.15-0.35	0.2-0.4	≤0.027	≤0.02	1.3-1.65	≤0.1	≤0.25	≤0.3
100Cr6	0.95-1.05	0.15-0.35	0.25-0.45	≤0.025	≤0.025	1.4-1.65	≤0.08	≤0.25	≤0.3

Heat Treatment Parameters

Quenching			Tempering
Heating Temperature (°C)	Cooling	Hardness (HRC)	Heating Temperature (°C)	Cooling	Hardness (HRC)
830-850	Oil	62-65	150-190	Air	58-62

Typical Applications

Manufacturing bearing rings and rolling elements for internal combustion engines, electric motors, automotive applications, tractors, machine tools, rolling mills, boring machines, mining machinery, and general machinery
High load and high speed rotating mechanical transmission bearings
Tool manufacturing including punching dies and measuring instruments

Available Stock Sizes

Product Form	Dimension	Size Range	Length
Round Bar	Diameter	16-280mm	4000-10000mm
Flat Steel	Thickness	8-200mm	3000-4000mm

Quality Assurance & Service Commitment

Government-Owned Steel Mill Quality
We source materials exclusively from certified steel manufacturers to ensure consistent quality and reliability in all our steel products.

Fast and 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.

ISO 9001 Certified Quality Management
Our integrated quality management system is continuously improved and certified according to ISO 9001 standards, with regular audits and recertification.

Our Comprehensive Services

We supply quality specialty steel for all industrial applications with orders of any size or length. Our services include metal cutting, sizing, machining (blanking, milling, grinding), heat treatment, sawing for small or large quantities, and excellent customer support.

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