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{"title":"ASTM A29\/A29m Hot Rolled Alloy Steel Round Bars SAE4340 10-350mm","imgUrl":"https:\/\/img.chinax.com\/nimg\/bb\/a1\/eb9afbd48509c13f9c6fa7b71d79-200x200-1\/astm_a29_2fa29m_hot_rolled_alloy_steel_round_bars_sae4340_10_350mm.jpg","attrs":{"Brand Name":"DELTA","Model Number":"SAE4340","Certification":"ISO","Place of Origin":"China"}}
{"title":"25Cr2MoVA Alloy Steel Round Bar Diameter 10 - 300mm Custom Cutting in Length","imgUrl":"https:\/\/img.chinax.com\/nimg\/b7\/8f\/c374af89362ac900e00ce51f86b6-200x200-1\/25cr2mova_alloy_steel_round_bar_diameter_10_300mm_custom_cutting_in_length.jpg","attrs":{"Brand Name":"DELTA","Model Number":"DIN 1.8159 (25CrMoV6-4) \/ 25Cr2MoVA","Certification":"ISO","Place of Origin":"China"}}
{"title":"EN DIN Standard 41CrAlMo7 Alloy Steel Round Bar Diameter 10 - 350mm SCM645 Alloy","imgUrl":"https:\/\/img.chinax.com\/nimg\/86\/8a\/f384d75ceea894a15b4f1ea6423b-200x200-1\/en_din_standard_41cralmo7_alloy_steel_round_bar_diameter_10_350mm_scm645_alloy.jpg","attrs":{"Brand Name":"DELTA","Model Number":"41CrAliMo7","Certification":"ISO","Place of Origin":"China"}}
{"title":"25Cr2MoVA \/ DIN1.8159 Alloy Steel Round Bar Hot Rolled Diameter 20 - 350mm in 6m","imgUrl":"https:\/\/img.chinax.com\/nimg\/55\/19\/5e678c170e39068beeabe330b547-200x200-1\/25cr2mova_2f_din1_8159_alloy_steel_round_bar_hot_rolled_diameter_20_350mm_in_6m_length.jpg","attrs":{"Brand Name":"DELTA","Model Number":"DIN 1.8159 (25CrMoV6-4) \/ 25Cr2MoVA","Certification":"ISO","Place of Origin":"China"}}
{"title":"EN 1.8507 (34CrAlMo5-10) Nitriding Steel Round Bar Diameter 10 - 300mm Custom","imgUrl":"https:\/\/img.chinax.com\/nimg\/25\/c9\/4f41b121bc96fda3bc795edf2de2-200x200-1\/en_1_8507_2834cralmo5_10_29_nitriding_steel_round_bar_diameter_10_300mm_custom_cutting.jpg","attrs":{"Brand Name":"DELTA","Model Number":"34CrAlMo5-10 \/ 1.8507","Certification":"ISO","Place of Origin":"China"}}
GCr15 / SAE52100 / EN31 Alloy Steel Round Bar for Bearing
Product Overview
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 heat treatment
Outstanding hot working performance
International Standards Comparison
Chinese
American
German
Japanese
GB GCr15
AISI SAE52100
DIN 100Cr6/EN31
JIS SUJ2
Chemical Composition (%)
Grades
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/ºC
Cooling
Hardness/HRC
Heating Temperature/ºC
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
Tool manufacturing including punching dies and precision measuring instruments
Available Stock Sizes
Round Bar
Diameter: 16-280mm
Length: 4000-10000mm
Flat Steel
Thickness: 8-200mm
Length: 3000-4000mm
Quality Assurance & Service
Premium Material Sourcing
We source materials exclusively from government-certified steel mills to ensure consistent quality and reliability in all our bearing steel products.
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.
Quality Commitment
Our ISO 9001 certified quality management system undergoes regular audits and continuous improvement to meet customer demands and quality standards.
Comprehensive Services
Quality specialty steel for all industrial applications
Orders of any size or 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, including sawing-to-size
Excellent customer service and technical support
Contact us for the latest pricing and detailed specifications NOW!
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
