China 20cr Alloy Steel Coils, Find details about China Steel Plates, Stainless Steel Plate from 20cr Alloy Steel Coils
Classification According to structure:
1. the pressure vessel with steel plate: in case of the tail of the trademark R, the number of available yield point can also be used with carbon content or containing alloy elements. Such as: Q345, Q345R for the yield point. Another example: 20R, 16MnR, 15MnVR, 15MnVNR, 8MnMoNbR, MnNiMoNbR, 15CrMoR and with carbon content or content of alloy elements to represent.
2. welding gas cylinders with steel plate: in case of the tail of the trademark HP, its brand can be said with the yield point, such as: Q345HP, Q295HP; also can be used to indicate the alloying elements such as: 16MnREHP.
3.boiler steel plate: with a small G in the tail said. Its grades can be said that the yield point, such as: Q390g; also can be used to indicate the amount of carbon or alloy elements, such as 20g, 22Mng, 15CrMog, 16Mng, 19Mng, 13MnNiCrMoNbg, 12Cr1MoVg, etc..
4. the bridge with the steel plate: with a small Q at the end of the brand, such as 16Mnq, Q420q, 14MnNbq, etc..
5. automobile beam steel plate: with a capital l at the end of the brand, said such as 09MnREL, 06til, 08TiL, 10TiL, 09sivl and 16MnL, 16MnREL etc..
Chemical composition contrast:
Grade | C | Si | Mn | P | S |
Q345A | ≤0.20 | ≤0.55 | 1.00-1.60 | ≤0.045 | ≤0.045 |
Q345B | ≤0.20 | ≤0.55 | 1.00-1.60 | ≤0.040 | ≤0.040 |
Q345C | ≤0.20 | ≤0.55 | 1.00-1.60 | ≤0.035 | ≤0.035 |
Q345D | ≤0.18 | ≤0.55 | 1.00-1.60 | ≤0.030 | ≤0.030 |
Grade | V | Nb | Al | Ti |
|
Q345A | 0.02-0.15 | 0.015-0.060 |
| 0.02-0.20 |
|
Q345B | 0.02-0.15 | 0.015-0.060 |
| 0.02-0.20 |
|
Q345C | 0.02-0.15 | 0.015-0.060 | ≥0.015 | 0.02-0.20 |
|
Q345D | 0.02-0.15 | 0.015-0.060 | ≥0.015 | 0.02-0.20 |
|