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TABLE I. Groupings of base materials (welding)
APPLICABLE DOCUMENT
CLASS OR TYPE
LETTER NO.
MIL-P-24338
Pipe
MIL-F-24339
Fittings and flanges
ASTM A 234
WPB (Fittings)
Grade B (tube and pipe) ASTM A757, grade A1Q (castings) grade A2Q ASTM A216, grade WCA (castings)
MIL-P-24691/1 MIL-C-24707/1
S-1
grade WCB grade WCC
Quenched and tempered carbon steel
S-2
ASTM A 537
Class 2
Carbon molybdenum steel
MIL-S-870
CMo (cast)
MIL-S-872
CMo class a (forgings) CMo class b (forgings)
S-3
MIL-T-16286
CrN1 type 8620 (bar and forgings)
MIL-S-16974
CrNi type 8620 (bar and forgings)
MIL-T-20155
CMo (tube and pipe)
DOD-F-24669/1
CrN1 type 8620 (bar and forgings)
MIL-P-24707/2
ASTM A217 grade WC1 (castings)
Alloy steels (Cr content not to exceed 2 percent), not to exceed 3/4 percent, total alloy not to exceed 2 percent)
ASTM A 302
MnMo, grade B (plate)
MIL-S-23194
Comp A, types Ia, Ib, and II
S-3A
MIL-S-24238
N1MnMo, comp A (plate)
Alloy steels (Cr content content 2-3/4 percent maximum) 3/4 percent, 2 percent total alloy maximum
AMS 6530
CrN1Mo (tube)
S-4
MIL-T-6736
CrMo, type 4130 (tube)
MIL-S-15464
CrMo class 1 (casting)
See footnotes at end of table.
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