Introduction to 38CrMoAl American Standard Boiler Vessel Plate
38CrMoAl is a high-grade nitriding steel plate, which has the characteristics of wear resistance, fatigue resistance and high strength. It is mainly used for nitrided parts with accurate dimensions after heat treatment, or various nitriding parts with low impact load and high wear resistance, such as boring bars, grinding machine spindles, automatic lathe spindles, gauges, models, governors, rotating sleeves, fixed sleeves on steam turbines, various wear-resistant parts on rubber and plastic extruders, etc.
| Chemical composition |
| Tabulation: Depu Steel Date: 2024-01-22 |
| C |
Mn |
|
Cr |
Ni |
Mo |
Si |
S |
Al |
| 0.35-0.42 |
0.30-0.60 |
1.35-1.65 |
≤0.30 |
0.15-0.25 |
0.20-0.45 |
≤0.035 |
0.70-1.10 |
Note:
(1): In order to improve the properties of steel, other trace alloying elements other than the above table can be added, and the data comes from the network and is for reference only.
(2): The allowable deviation of the chemical composition of the finished steel plate shall comply with the provisions of
GB/T222 heat treatment specifications and metallographic structure: heat treatment specifications:
quenching 940 °C, water cooling, oil cooling; Tempered at 640°C, water-cooled, oil-cooled.
● Delivery Status: Delivered in (normalized, annealed or tempered at high temperature) or without heat treatment, the delivery status should be indicated in the contract.
●Annealing annealing No.1" 760±10°C annealing, furnace cooling to 400°C air cooling.
38CrMoAl has high surface hardness, wear resistance and fatigue strength, and has good heat resistance and corrosion resistance, and the hardenability is not high. It is used to make nitriding parts with high wear resistance, high fatigue strength and considerable strength, and high dimensional accuracy after treatment, such as imitation molds, cylinder liners, gears, high-pressure valves, boring bars, worms, grinding machine spindles, etc. However, larger parts should not be used. 38CrMoAl container plate production process:
electric furnace smelting→LF/VD furnace refining→ ingot → cleaning→ ingot heating→ rolling plate → flaw detection→ normalizing → steel plate grinding→ cutting and sampling→ performance inspection → warehousing
