Issues regarding the flange material report
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The flange specified in the customer’s order is made of 20#, but currently flanges are generally made from A105 material. The material can be replaced; it’s just that the material certificate should state 20#. Can the raw material from the steel manufacturer used be A105? Thank you
A105 is a US standard designation, where A refers to ordinary carbon structural steel. Standard name: Carbon steel forgings for pipe fittings. Since this standard specifies only one type of carbon steel forging, A105 is also considered a carbon steel grade for forgings. A105 is also a material code; it belongs to special steels and is a type of cold-forged steel. A105 is a low-carbon steel forging, whose mechanical properties lie between those of 20 Number forged steel and 16Mn forged steel. Chemical composition: C: ≤0.35, Si: ≤0.35, Mn: 0.6–1.05, S: ≤0.050, P: ≤0.040. Note: In piping systems, A105 can generally replace grade 20, but grade 20 cannot fully replace A105 due to the significant difference in strength. Different intensity differences determine different product structures!
Indicate the actual condition of the flange clearly!
For my 20# flange material report, can A105 be used as the raw material specification?
Are the material specifications and mechanical properties also indicated?
A105 can replace 20#, but 20# cannot replace A105\
Pay attention to the carbon content of A105; it should not exceed 0.30%
A105 can replace 20#, but 20# cannot replace A105. Agreed!
In principle, such use is not allowed
Manufacturing enterprises are not allowed to substitute for one another in this way; otherwise, there will be no standards at all