ALLOY TOOL STEELS SKD GRADE (FOR COLD WORK)

MATERIALS
GRADE
CHEMICAL COMPOSITION %
C Si Mn P S Cr Mo W V
SKS3 0.90~1.00 0.35 max. 0.90~1.20 0.030 max. 0.030 max. 0.50~1.00 0.50~1.00
SKS31 0.95~1.05 0.35 max. 0.90~1.20 0.030 max. 0.030 max. 0.80~1.20 0.50~1.00
SKS93 1.00~1.10 0.50 max. 0.80~1.10 0.030 max. 0.030 max. 0.20~0.60
SKS94 0.90~1.00 0.50 max. 0.80~1.10 0.030 max. 0.030 max. 0.20~0.60
SKS95 0.80~0.90 0.50 max. 0.80~1.10 0.030 max. 0.030 max. 0.20~0.60
SKD1 1.90~2.20 0.10~0.60 0.20~0.60 0.030 max. 0.030 max. 11.00~13.00
SKD2 2.00~2.30 0.10~0.40 0.30~0.60 0.030 max. 0.030 max. 11.00~13.00 0.60~0.80
SKD10 1.45~1.60 0.10~0.60 0.20~0.60 0.030 max. 0.030 max. 11.00~13.00 0.70~1.00 0.70~1.00
SKD11 1.40~1.60 0.40 max. 0.60 max. 0.030 max. 0.030 max. 11.00~13.00 0.80~1.20 0.20~0.50
SKD12 0.95~1.05 0.10~0.40 0.40~0.80 0.030 max. 0.030 max. 4.80~5.50 0.90~1.20 0.15~0.35

QUENCH-TEMPER HARDNESS (FOR TEST PIECE)

SKS3
SKS31
SKS93
SKS94
SKS95
SKD1
SKD2
SKD10
SKD11
SKD12
830 Oil quench
830 Oil quench
820 Oil quench
820 Oil quench
820 Oil quench
970 Air cooled
970 Air cooled
1020 Air cooled
1030 Air cooled
970 Air cooled
180 Air cooled
180 Air cooled
180 Air cooled
180 Air cooled
180 Air cooled
180 Air cooled
180 Air cooled
180 Air cooled
180 Air cooled
180 Air cooled
60 min. 61 min. 63 min. 61 min. 59 min. 62 min. 62 min. 61 min. 58 min. 60 min.