SA 280 Material Replacement
SA 280 Material Replacement
(OP)
I've got an old drawing w/ SA 280 listed as a material. It was replaced in 1953 w/ A 335 I believe, but I'm not sure which grade as I can't find any more information than that.
I'm looking for some help. Thanks.
I'm looking for some help. Thanks.
Brian





RE: SA 280 Material Replacement
The grades in the SA-280 Specification that carried over were probably;
Grades P1, P2, P5, P5b, P5c, P9, P11, P12, P15, and P22
You need to verify the chemical composition if you suspect SA-280 vintage material because of the choice in grades. This can be done using a portable alloy analyzer to check for Chromium and Molybdenum contents.
RE: SA 280 Material Replacement
According to my 1952 Edition of ASME B&PV Code, Section I on Power Boilers, the only listing of alloy steel under this specification (SA-280) was 1/2Cr-1/2Mo.
The SA-335 specification at that time listed the following grades;
P1,P2,P3b,P5a,P5b,P11,P12,P16,P17,P21 and P22.
I have one other source of information - an ASTM Standard - which is at another location. I will check tomorrow.
RE: SA 280 Material Replacement
Thanks.
Brian
RE: SA 280 Material Replacement
On the drawing, double check to see if there is a number after SA-280. The 1/2Cr-1/2Mo steel composition under SA-280 in Section I would be P2.
What exactly is your situation/application regarding SA-280 material.