Product Description
TORICH GB/T18254 High Carbon Chromium Bearing Steel Automotive Round Tube
| Standard | GB/T18254 |
| Material | G8Cr15, GCr15, GCr15SiMn, GCr15SiMo, GCr18Mo |
| Size | OD: 5-100mm WT: 0.5-15 Length: 3-12m |
| Delivery Condition | Heat Treatment |
| Application | Bearing, Bearing Parts |
| No. | Grade | Chemical Composition % |
| C | Si | Mn | Cr | Mo |
| B00151 | G8Cr15 | 0.75-0.85 | 0.15-0.35 | 0.20-0.40 | 1.30-1.65 | ≤0.10 |
| B00150 | GCr15 | 0.95-1.05 | 0.15-0.35 | 0.25-0.45 | 1.40-1.65 | ≤0.10 |
| B01150 | GCr15SiMn | 0.95-1.05 | 0.45-0.75 | 0.95-1.25 | 1.40-1.65 | ≤0.10 |
| B03150 | GCr15SiMo | 0.95-1.05 | 0.65-0.85 | 0.20-0.40 | 1.40-1.70 | 0.30-0.40 |
| B02180 | GCr18Mo | 0.95-1.05 | 0.20-0.40 | 0.25-0.40 | 1.65-1.95 | 0.15-0.25 |
Permissible Variations
| Steel Pipe type and 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 | +0.20 |
| -0.10 |
| >65 | ±0.20 |
| Thickness | 3-4 | +12% |
| >4-12 | +10% |
| Other Production Method | Negatiated by the parties and indicated into contract |
| 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 |
Delivery Condition
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)
Product Show
QUALITY CONTROL: 1. Incoming Raw Material Inspection
2. Raw Material Segregation to avoid steel grade mix-up
3. Heating and Hammering End for Cold Drawing
4. Cold Drawing and Cold Rolling, on line inspection
5. Heat Treatment, +A, +SRA, +LC, +N, Q+T
6. Straightening-Cutting to specified length-Finished Measuring Inspection
7. Machanical Testing in own labs with Tensile Strength, Yield Strength, Elongation, Hardness, Impact, Mictrostruture etc
8. Packing and Stocking
100% of our steel tubes are dimensionally checked
100% of our steel tubes are visually checked to assure they have a perfect surface condition and no surface defects.
100% eddy current test and ultrosonic test to eliminate longitudinal and transversal defects.
FAQ
Q: Are you trading company or manufacturer ?
A: A professional steel pipes materials inventor, manufacturer and solution provider
Q: How long is your delivery time?
A: Generally it is 7-14 days if the goods are in stock. or it is 30-60 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples of carbon seamless steel tube ? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us
TORICH GB/T18254 High Carbon Chromium Bearing Steel Automotive Round Tube
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