
Industry Park of Shangkeng
Sanmen ,Taizhou ,Zhejiang ,China
Product Features
Chief Application
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Chemical Composition
Product Name |
Ingredient(Wt,% ) | ||||||||
C | Si | Mn | P | S | Cr | Ni | Mo | V | |
718 | 0.32-0.40 | 0.20-0.40 | 1.10-1.50 | ≤0.015 | ≤0.010 | 1.70-2.00 | 0.90-1.20 | 0.30-0.55 | / |
Specification & Hardness
Thickest thickness 1200mm
Hardness HRC31-35 or based on customers’ requirement.
Ultrasonic Flaw Detection
Physical Properties
Thermal Expansion Coefficient 10-6m(m*k) |
18~100°C | 18~200°C | 18 〜300°C | 18~400°C | 18~500°C | 18 〜600°C | 18 〜700°C |
11.9 | 12.2 | 12.5 | 12.81 | 13.11 | 13.41 | 13.71 |
Thermal Conductivity W/m*k |
20°C | 100°C | 200°C | 300°C | 400°C |
36 | 33.4 | 31.4 | 30.1 | 29.3 |
Continuous Cooling Transition(CCT)Map | Tempering Curve |
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Metallographic Structure
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100mm from surface | 300mm from surface | Core |
Heat Treatment Process
Item | HeatingTemperature(°c) | Cool Method | Hardness |
Annealing | 710-740 | Furnace Cold | ≤220HB |
Quenching | 850-880 | Oil Cooler or Air Cooling | 48-52HRC |
Tempering | 560-680 | Air Cooling | 30-35HRC |
Microstructure