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Bearing GB / T 18254 Galvanized Steel Tube High Carbon Chromium Steel Round Tube

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Bearing GB / T 18254 Galvanized Steel Tube High Carbon Chromium Steel Round Tube

Country/Region china
City & Province ningbo zhejiang
Categories Metal Processing Service

Product Details

Bearing GB / T 18254 Galvanized Steel Tube High Carbon Chromium Steel Round Tube Bearing tubes&steel tubes

 

High Carbon Chromium Bearing Steel Tube GB/T 18254:2002

 

Size:

OD 5-100mm

WT 0.5-15mm  

Length: 12000mm

Application: Bearing, Bearing Parts

Steel pipe OD, Thickness and permissible

 

Steel pipe type amd production method Sizesize range permissible variation
hot rolled steel pipe Assel rolling+peelingOD55-148±0.15
>148-170±0.20
thickness4-8+20%
>8-34+15%
Assel hot rolledOD60-67±0.35
>75-100±0.50
>100-170±0.50%
thicknessOD<80<80+12%
OD≥80≥80+10%
cold drawn steel pipeOD≤65+0.2
-0.10
>65±0.20
thickness3-4+12%
>4-12+10%
other production methodsnegatiated by the parties and indicated into contract

 

 

Steel Curvature
steel typecurvature/(mm*m)≤total curvature/mm ≤
hot rolled round steel40.4%*steel length
hot rolled&annealed round steel30.3%*steel length
hot forged round steel 50.5%*steel length
cold drawn round steelDiameter≤25mm20.2%*steel length
Diameter>25mm1.50.15%*steel length
steel pipethickness≤15mm14
thickness>15mm1.5

 

 

Grade and chemical composition
No.GradeCSiMnCrMoPSNiCuNI+Cumoulded steelcontinuously cast steel
not exceeding
B00040GCr40.95-1.050.15-0.300.15-0.300.35-0.50≤0.080.0250.020.250.2 15*10-612*10-6
B00150GCr150.95-1.050.15-0.350.25-0.451.40-1.65≤0.100.0250.0250.30.250.515*10-612*10-6
B01150GCr15SiMn0.95-1.050.45-0.750.95-1.251.40-1.65≤0.100.0250.0250.30.250.515*10-612*10-6
B03150GCr15SiMo0.95-1.050.65-0.830.20-0.401.40-1.700.30-0.400.0270.020.30.25 15*10-612*10-6
B02180GCr18Mo0.95-1.050.20-0.400.25-0.401.65-1.950.15-0.250.0250.020.250.25 15*10-612*10-6

 

Condition of delivery

 

WHR   Hot rolling and hot forging unannealed round steel

WHSTAR  Hot rolling and hot forging soft annealed round steel

WHTGR  Hot rolling spheroids annealed round steel

WHTGSFR  Hot rolling spheroids annealed peeled round steel

WHSTASFR  Hot rolling and hot forging soft annealed peeled peeled round steel

WCR  Cold drawn(cold rolled)round steel

WCSPR  Cold drawn(cold rolled)polished round steel

WHT  Hot rolling steel tube

WHTASFT Hot rolling annealed peeled steel tube

WCT Cold drawn(cold -rolled)steel tube

After negotiation of the customer and supplier (stipulated in contract),the delivery condition can be “Annealed+phosphatized+micro  drawing”+”Annealed+micro drawing”etc

WHWY Wire rod steel (hot rolling or spheroids annealed)

 

Hardness of Annealed steel products 
GradeHBW
GCr4179-207
GCr15179-207
GCr15SiMn179-217
GCr15SiMo179-217
GCr18Mo179-207

 

 

Degree of Material purity

 

Non-metal inclusion Quanlified Level
Non-metal inclusion TypeQualified Level Not exceed
Thin typeThick type
A2.51.5
B21
C0.50.5
D11

 

 
Coloring requirements for different grades
GradeColor
GCr4one green+one white
GCr15one blue
GCr15SiMnone green+one blue
GCr15SiMoone white+on yellow
GCr18Motwo green

 

 

 

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