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Bearing steel

Bearing steel  Bearing steel  Bearing steel
Bearing steel
is a kind of steel to used for ball bearing, roller bearing and bearing sheath. Bearing steel can be broadly divided into High-carbon chromium bearing steel, Carburized Bearing Steel,Stainless bearing steel,High temperature bearing steel,etc.

High-carbon chromium bearing steel,also named fully quenching steel for the character of high hardness (HRC 58-60), is an important category,usually used for manufacturing bearing and its parts. Among its including grades, GCr15 and GCr15SiMn are the common steel, and GCr15 is the most popular.

The main grades of the high-carbon chromium bearing steel are GB/T 18254 GCr4,ΓOCT 801 IIIX4,ASTM A295 50100, GB/T18254 GCr15,ΓOCT 801 IIIX15,ASTM A295 52100,ISO 683-17  1,JIS G4805 SUJ2,DIN 17230 100Cr 6,NF A35-565 100Cr 6,GB/T18254 GCr15SiMn,ΓOCT 801 IIIX15CΓ,ISO 683-17  3,DIN 17230 100CrMn 6,NF A35-565 100Cr Mn6,GB/T 18254 GCr18Mo,DIN 17230 100CrMo 7,SKF D33 SKF24

Carburized bearing steel,also named super low carbon alloy structural steel, contains lower carbon element and some alloy elements with high requirements to the purity and structural homogeneity of the steel. After the heat treatment of carburizing,quenching,tempering etc., Carburized Bearing Steel has good surface abrasive resistance and its core possesses good  ductility with surface hardness 58-62HRC,core hardness25-45HRC.

The main grades of the high-carbon chromium bearing steel are GB/T 3203  G20CrMo,ASTMA534   4118H,GB/T 3203  G20CrNiMo,ASTMA534   8620H,ISO 683-17   12,JIS G4103   SNCM220,NF A35-565 20NiCrMo2,BS970 Part 1 805 M20  805 A20,GB/T 3203  G20CrNi2Mo,ΓOCT 4543   20XH2M,ASTM A534   4320H,ISO 683-17   14,JIS G4103   SNCM420,NF A35-565 20NiCrMo7,GB/T 3203  G20Cr2Ni4,ΓOCT 4543   20X2H4A,GB/T 3203  G10CrNi3Mo,ASTM A534   9310H,NF A35-565 13NiCr14

Stainless bearing steel , also called heat and corrosion resistant bearing steel, is mainly used for manufacturing bearing in bad  corrosion condition. Compared with other common bearing steels, it owns higher corrosion resistance,so usually used for bearing or its parts in strong corrosion condition.

The main grades of the high-carbon chromium bearing steel are GB/T 3086   9Cr18,ΓOCT 5632    95X18,JIS G4303  SUS440C,GB/T 3086   9Cr18Mo,ASTM A756  S44004(UNS),ISO 683-17   21,JIS G4303SUS440C,DIN 17230 X102CrMo17,NF A35-565     Z105CrMo17

High temperature bearing steel,generally speaking,has excellent hardness,even at 430ºC. And it also owns good hot strength, abrasive resistance and resistance to oxidation. When at high temperature, it keeps stable size and good machinability,mainly used for high temperature engine bearings.
The main grades of the high temperature bearing steel are YB 688   Cr4Mo4V,ASTM A600  T11350(M50),ISO 683-17   30(81CrMoV42-16),DIN 17230  80MoCrV42-16,NF A35-565     80MoCrV42-16 ,YB 1205  Cr14Mo4 ,ASTM A756  440CMoD,YB 4106   G13Cr41704Ni4V,AMS 6278 4.1Cr-3.4Ni-4.2Mo-1.2V-(0.11-1.15C)

GB/T 3086 9Cr18 ΓOCT 5632 95X18     JIS G4303 SUS440C      
GB/T 3086 9Cr18Mo   ASTM A756 S44004(UNS) ISO 683-17 21 JIS G4303SUS440C DIN 17230 X102CrMo17 NF A35-565 Z105CrMo17  
YB 688 Cr4Mo4V   ASTM A600 T11350(M50) ISO 683-17 30(81CrMoV42-16)   DIN 17230 80MoCrV42-16 NF A35-565 80MoCrV42-16  
YB 1205 Cr14Mo4   ASTM A756 440CMoD          
YB 4106 G13Cr41704Ni4V   AMS 6278 4.1Cr-3.4Ni-4.2Mo-1.2V-(0.11-1.15C)          
GB/T 3203 G20CrMo   ASTMA534 4118H          
GB/T 3203 G20CrNiMo   ASTMA534 8620H ISO 683-17 12 JIS G4103 SNCM220 NF A35-565 20NiCrMo2 BS970 Part 1 805 M20 805 A20  
GB/T 3203 G20CrNi2Mo ΓOCT 4543 20XH2M ASTM A534 4320H ISO 683-17 14 JIS G4103 SNCM420 NF A35-565 20NiCrMo7    
GB/T 3203 G20Cr2Ni4 ΓOCT 4543 20X2H4A            
GB/T 3203 G10CrNi3Mo   ASTM A534 9310H     NF A35-565 13NiCr14    
GB/T 18254 GCr4 ΓOCT 801 IIIX4 ASTM A295 50100          
GB/T18254 GCr15 ΓOCT 801 IIIX15 ASTM A295 52100 ISO683-17 1 JIS G4805 SUJ2 DIN 17230 100Cr 6 NF A35-565 100Cr 6  
GB/T18254 GCr15SiMn ΓOCT 801 IIIX15CΓ   ISO683-17 3   DIN 17230 100CrMn 6 NF A35-565 100Cr Mn6  
GB/T 18254 GCr18Mo         DIN 17230 100CrMo 7   SKF D33 SKF24

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