Classiffication Grade
K.S
(JIS)
Temper(ðàòõ)
Tensile Strength Test
(ù÷ÕÃË­ÓøãËúÐ)
Hardness
Distintion
(Ï¡ÝÂ)
Symbol
(ÑÀûÜ)
Tensile Strength
(ù÷ÕÃË­Óø)(Kgf/mm2)
Elongation
(ÕÃãß)(%)
(HV)
(ÌãÓø)
Commecial Quality
(1ðú)
SCP1
(SPCC)
As Annealed
A
28Min.
34Min.
105Max.
Nomal-
Tempering
S
28Min.
32Min.
110Max.
1/8Hardness
1/8H
30~42
25Min.
95~130
1/4Hardness
1/4H
30~50
10Min.
115~130
1/2Hardness
1/2H
45~60
-
135~185
Full hard
H
56Min.
-
170Max.
Drawing Quality
(2ðú)
SCP2
(SPCD)
Skin-Rolled
Annealed
S.A
28Min.
34Min.
105Max.
Deep Drawing Quality
(2ðú)
SCP3
(SPCE)
Skin-Rolled
Annealed
S.A
28Min.
36Min.
105Max.
 
Symbol of temper
(ðàòõÑÀûÜ)
A
S
R
Distinction of Temper
(ðàòõÏ¡ÝÂ)
Annealing state
(áÀÔï(ÕÒÊ¿)ßÒ÷¾)
Skin pass State
(øöñÞðàòõßÒ÷¾)
Cold Rolled State
(Ò²ÊàäâæÅßÒ÷¾)
Symbol
(ÑÀûÜ)
Hardness(HV)
(ÌãÓø)
Tensile Strength(Kgf/mm2)
(ù÷ÕÃË­Óø)
Elongation(%)
(ÕÃãß)
Hardness(HV)
(ÌãÓø)
Hardness(HV)
(ÌãÓø)
SK2M
180~220
60~70
15Min.
220Max.
220~280
SK3M
180~220
60~70
15Min.
220Max.
220~280
SK4M
180~220
50~70
20Min.
210Max.
210~270
SK5M
170~200
50~70
20Min.
210Max.
210~270
SK6M
170~190
50~60
25Min.
200Max.
200~260
SK7M
150~190
50~60
25Min.
200Max.
200~260
S30CM
140~150
45Max
30Min.
150Max.
150~250
S35CM
140~150
45Max
27Min.
150Max.
150~250
S45CM
140~160
50Max
27Min.
160Max.
150~260
S50CM
140~160
50Max
27Min.
160Max.
150~260
S55CM
150~170
55Max
27Min.
170Max.
150~260
S60CM
150~170
55Max
25Min.
170Max.
170~260
S65CM
160~180
60Max
23Min.
190Max.
180~320
S70CM
160~190
60Max
23Min.
190Max.
190~320