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[China]
Trade Verify
Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact name:Richard SHEN
TORICH INTERNATIONAL LIMITED |
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Verified Suppliers
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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 | Size | size range | permissible variation | ||
| hot rolled steel pipe | Assel rolling+peeling | OD | 55-148 | ±0.15 | |
| ＞148-170 | ±0.20 | ||||
| thickness | 4-8 | +20% | |||
| ＞8-34 | +15% | ||||
| Assel hot rolled | OD | 60-67 | ±0.35 | ||
| ＞75-100 | ±0.50 | ||||
| ＞100-170 | ±0.50% | ||||
| thickness | OD＜80 | ＜80 | +12% | ||
| OD≥80 | ≥80 | +10% | |||
| cold drawn steel pipe | OD | ≤65 | +0.2 | ||
| -0.10 | |||||
| ＞65 | ±0.20 | ||||
| thickness | 3-4 | +12% | |||
| ＞4-12 | +10% | ||||
| other production methods | negatiated by the parties and indicated into contract | ||||
| Steel Curvature | |||
| steel type | curvature/(mm*m)≤ | total curvature/mm ≤ | |
| hot rolled round steel | 4 | 0.4%*steel length | |
| hot rolled&annealed round steel | 3 | 0.3%*steel length | |
| hot forged round steel | 5 | 0.5%*steel length | |
| cold drawn round steel | Diameter≤25mm | 2 | 0.2%*steel length |
| Diameter＞25mm | 1.5 | 0.15%*steel length | |
| steel pipe | thickness≤15mm | 1 | 4 |
| thickness＞15mm | 1.5 | ||
| Grade and chemical composition | |||||||||||||
| No. | Grade | C | Si | Mn | Cr | Mo | P | S | Ni | Cu | NI+Cu | moulded steel | continuously cast steel |
| not exceeding | |||||||||||||
| B00040 | GCr4 | 0.95-1.05 | 0.15-0.30 | 0.15-0.30 | 0.35-0.50 | ≤0.08 | 0.025 | 0.02 | 0.25 | 0.2 | 15*10-6 | 12*10-6 | |
| B00150 | GCr15 | 0.95-1.05 | 0.15-0.35 | 0.25-0.45 | 1.40-1.65 | ≤0.10 | 0.025 | 0.025 | 0.3 | 0.25 | 0.5 | 15*10-6 | 12*10-6 |
| B01150 | GCr15SiMn | 0.95-1.05 | 0.45-0.75 | 0.95-1.25 | 1.40-1.65 | ≤0.10 | 0.025 | 0.025 | 0.3 | 0.25 | 0.5 | 15*10-6 | 12*10-6 |
| B03150 | GCr15SiMo | 0.95-1.05 | 0.65-0.83 | 0.20-0.40 | 1.40-1.70 | 0.30-0.40 | 0.027 | 0.02 | 0.3 | 0.25 | 15*10-6 | 12*10-6 | |
| B02180 | GCr18Mo | 0.95-1.05 | 0.20-0.40 | 0.25-0.40 | 1.65-1.95 | 0.15-0.25 | 0.025 | 0.02 | 0.25 | 0.25 | 15*10-6 | 12*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 | |
| Grade | HBW |
| GCr4 | 179-207 |
| GCr15 | 179-207 |
| GCr15SiMn | 179-217 |
| GCr15SiMo | 179-217 |
| GCr18Mo | 179-207 |
Degree of Material purity
| Non-metal inclusion Quanlified Level | ||
| Non-metal inclusion Type | Qualified Level Not exceed | |
| Thin type | Thick type | |
| A | 2.5 | 1.5 |
| B | 2 | 1 |
| C | 0.5 | 0.5 |
| D | 1 | 1 |
| Coloring requirements for different grades | |
| Grade | Color |
| GCr4 | one green+one white |
| GCr15 | one blue |
| GCr15SiMn | one green+one blue |
| GCr15SiMo | one white+on yellow |
| GCr18Mo | two green |
