표준
AISI, ASTM, bs, DIN, GB, JIS
지상 처리
Black surface/ Grinded/ Machined
Surface treatment
Black/Grinded/Machined/Turned
Production route
EF/EAF+LF+VD/ESR
Quality inspection
UT, Chemical test, Microstructure, Physical properties etc.
UT test standard
SEP1921-84 class3 C/c to D/d
Tolerance
0/+1.0mm(Turned ) -0/+5.0mm(black)