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Contact Supplier| Material standard | GM140T-00(GB) |
|---|---|
| Dimension | ID: 80mm-1600mm Length: 6000mm to 8000mm |
| Weight | 20MT-30MT |
| Chemical Composition | C: 0.16-0.22%; Si: 0.20-0.40%; Mn: 0.20-0.40%; Cr: 2.30-2.60%; Mo: 0.30-0.40%; P: 0.015%max; S: 0.010%max; Ni: 0.5%max. |
| Mechanical Properties | Hardness: BHN=220-260; Tensile Strength: MPa: min.750; Yield Strength: MPa: min.650; Impact Strength: 180 akJ min.; Elongation: 15% min.; Reduction Area: 50% min.; Heat Treatment: Hardened and fully tempered; Inside Taper: Will be in steps; Surface Condition: Finishing Machining without honing ( Inside: 1.6-3.2 Ra, Outside: 3.2-6.3 Ra ); Radial Runout Tolerance: 0.15mm; |
| Technological Process | Heat - Forging (upsetting) - 2nd Heat – 2nd Forging (upsetting) - 3rd Heat – 3rd Forging (upsetting) – Cooling – Annealing - Heat treatment (Normalizing & tempering) - Sizing - Ultrasonic Test - Machining (External milling & Internal boring) - Final Heat treatment - Finishing machining - Ultrasonic Test. |






