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  • JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
    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
Contact Person : Gao
Phone Number : 18068357371
Whatsapp : +8618068357371

Polished Surface GCr15 Bearing Steel Round Bar with High Hardenability and OD 6-630mm

  • Polished Surface GCr15 Bearing Steel Round Bar with High Hardenability and OD 6-630mm
  • Polished Surface GCr15 Bearing Steel Round Bar with High Hardenability and OD 6-630mm
  • Polished Surface GCr15 Bearing Steel Round Bar with High Hardenability and OD 6-630mm
  • Polished Surface GCr15 Bearing Steel Round Bar with High Hardenability and OD 6-630mm
  • Polished Surface GCr15 Bearing Steel Round Bar with High Hardenability and OD 6-630mm
  • Polished Surface GCr15 Bearing Steel Round Bar with High Hardenability and OD 6-630mm
Minimum Order Quantity 1 Ton
Price US $690-1,150 / Ton
Product Details
Diameter Range 6-630mm Carbon Content 0.95-1.05%
Silicon Content 0.15-0.35% Manganese Content 0.2-0.4%
Chromium Content 1.3-1.65% Phosphorus Content ≤0.027%
Sulfur Content ≤0.02% Quenching Temperature 830-850°C
Quenching Medium Oil Quenched Hardness 62-65 HRC
Tempering Temperature 150-190°C Tempered Hardness 58-62 HRC
Round Bar Length 4000-10000mm Flat Steel Thickness 8-200mm
Flat Steel Length 3000-4000mm
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Polished Surface Bearing Steel Round Bar

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High Hardenability GCr15 Steel Round Bar

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OD 6-630mm Alloy Steel Round Bar
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Product Description
GCr15 / SAE52100 / EN31 Alloy Steel Round Bar for Bearing Applications
Product Introduction

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 cost-effective alloy content
  • High hardenability with comprehensive mechanical properties
  • Excellent machinability following spheroidizing annealing
  • High hardness, uniform structure, superior wear resistance, and high contact fatigue performance after heat treatment
  • Superior hot working performance for manufacturing efficiency
International Standards Equivalents
Chinese American German Japanese
GB GCr15 AISI SAE52100 DIN 100Cr6/EN31 JIS 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 systems, tractors, machine tools, rolling mills, boring machines, mining equipment, and general machinery
  • High-load, high-speed rotating mechanical transmission bearings
  • Specialized tooling applications including punching dies and precision measuring instruments
Available Stock Sizes
Product Form Dimension Size Range
Round Bar Diameter 16-280mm
Length 4000-10000mm
Flat Steel Thickness 8-200mm
Length 3000-4000mm
Quality Assurance & Service Excellence
Premium Material Sourcing

We source materials exclusively from government-owned steel mills to ensure consistent quality and reliability in every steel product we supply. Our two decades of industry experience demonstrate our commitment to delivering both superior quality and competitive pricing.

Reliable Delivery Performance

We prioritize timely delivery alongside product quality. Whether you require raw materials or finished components with machining or heat treatment, we expedite every order to ensure the shortest possible lead times.

Quality Management System

Our integrated quality and work management system is continuously improved to meet evolving customer demands. We maintain ISO 9001 certification with regular audits and recertification to validate our quality commitment.

Comprehensive Service Offering
  • Quality specialty steel for all industrial applications
  • Flexible order quantities with fast shipping
  • Unique inventory of specialty steel products
  • Value-added services including metal cutting, sizing, machining (blanking, milling, grinding), and heat treatment
  • Sawing services for small or large quantities with precision sizing
  • Exceptional customer service and technical support
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