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18MnMoNbR steel plate melting composition / yield tensile / impact performance

Posted:2021-08-18 11:05:07
18MnMoNbR steel plate
1. The material 18MnMoNbR is steel plate for boilers and pressure vessels, and the implementation standard is GB713.

2. 18MnMoNbR steel plate chemical composition:
C Si Mn P S Ni Cr Mo Cu Nb
≤0.22 0.15-0.5 1.2-1.6 ≤0.025 ≤0.02 ≤0.3 ≤0.3 0.45-0.65 ≤0.3 0.025-0.05

3. 18MnMoNbR heat treatment method: normalizing and tempering.

4. 18MnMoNbR flaw detection standard NB/T47013.3

5. 18MnMoNbR steel plate mechanical properties:
Thickness Heat treatment

Details

30-60mm Normalizing, tempering ReL(MPa) ≥440  
Rm(MPa) 590~740  
A5(%) ≥17  
Impact temperature 0  
Akv(J) ≥31 horizontal
Bend diameter 3a  
Bending angle 180  
Performance description Heat treatment: normalizing + tempering
60-100mm ReL(MPa) ≥410  
Rm(MPa) 570~720  
A5(%) ≥17  
Impact temperature 0  
Akv(J) ≥31 horizontal
Bend diameter 3a  
Bending angle 180  
Performance description Heat treatment: normalizing + tempering

6. 18MnMoNbR steel plate: "18" is 0.18% carbon content, "Mn" indicates the composition contains a certain chemical element - manganese, "Mo" indicates the composition contains a certain chemical element - molybdenum, "Nb" means niobium, and "R" is letter of the vessel plate, which represents its purpose.
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