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Longhai Product Standard

1.Low Carbon steel Wire Rod
JIS

Chemical Composition (%)
C
Si
Mn
P
S
Cu
SWRM 6
0.08 max.
-
0.60 max.
0.045 max.
0.045 max.
-
SWRM 8
0.10 max.
-
0.60 max.
0.045 max.
0.045 max.
-
SWRM 10
0.08~0.13
-
0.30~0.60
0.045 max.
0.045 max.
-
SWRM 12
0.10~0.15
-
0.30~0.60
0.045 max.
0.045 max.
-
SWRM 15
0.13~0.18
-
0.30~0.60
0.045 max.
0.045 max.
-
SWRM 17
0.15~0.20
-
0.30~0.60
0.045 max.
0.045 max.
-
SWRM 20
0.18~0.23
-
0.30~0.60
0.045 max.
0.045 max.
-
SWRM 22
0.20~0.25
-
0.30~0.60
0.045 max.
0.045 max.
-
Remark : In the case of killed steel, a "K" is added at the end of the code (for example, SWRM 10K).

SAE/AISI

SAE/AISI
Chemical Composition (%)
C
Mn
P
S
Si
1005
0.06 max.
0.35 max.
0.040 max.
0.050 max.
-
1006
0.08 max.
0.25~0.40
0.040 max.
0.050 max.
-
1008
0.10 max.
0.30~0.50
0.040 max.
0.050 max.
-
1010
0.08~0.13
0.30~0.60
0.040 max.
0.050 max.
-
1012
0.10~0.13
0.30~0.60
0.040 max.
0.050 max.
-
1013
0.11~0.16
0.50~0.80
0.040 max.
0.050 max.
-
1015
0.13~0.18
0.30~0.60
0.040 max.
0.050 max.
-
1016
0.13~0.18
0.60~0.80
0.040 max.
0.050 max.
-
1017
0.15~0.20
0.30~0.60
0.040 max.
0.050 max.
-
1018
0.15~0.20
0.60~0.90
0.040 max.
0.050 max.
-
1019
0.15~0.20
0.70~1.00
0.040 max.
0.050 max.
-
1020
0.18~0.23
0.30~0.60
0.040 max.
0.050 max.
-
1021
0.18~0.23
0.60~0.90
0.040 max.
0.050 max.
-
1022
0.18~0.23
0.70~1.00
0.040 max.
0.050 max.
-
1023
0.20~0.25
0.30~0.60
0.040 max.
0.050 max.
-
1025
0.22~0.28
0.30~0.60
0.040 max.
0.050 max.
-
1026
0.22~0.28
0.30~0.60
0.040 max.
0.050 max.
-

2. High Carbon steel Wire Rod
JIS

SAE/AISI
Chemical Composition (%)
C
Si
Mn
P
S
SWRH 27
0.24~0.31
0.15~0.35
0.30~0.60
0.040 max.
0.040 max.
SWRH 32
0.29~0.36
0.15~0.35
0.30~0.60
0.040 max.
0.040 max.
SWRH 37
0.34~0.41
0.15~0.35
0.30~0.60
0.040 max.
0.040 max.
SWRH 42A
0.39~0.46
0.15~0.35
0.30~0.60
0.040 max.
0.040 max.
SWRH 42B
0.39~0.46
0.15~0.35
0.60~0.90
0.040 max.
0.040 max.
SWRH 47A
0.44~0.51
0.15~0.35
0.30~0.60
0.040 max.
0.040 max.
SWRH 47B
0.44~0.51
0.15~0.35
0.60~0.90
0.040 max.
0.040 max.
SWRH 52A
0.49~0.56
0.15~0.35
0.30~0.60
0.040 max.
0.040 max.
SWRH 52B
0.49~0.56
0.15~0.35
0.60~0.90
0.040 max.
0.040 max.
SWRH 57A
0.54~0.61
0.15~0.35
0.30~0.60
0.040 max.
0.040 max.
SWRH 57B
0.54~0.61
0.15~0.35
0.60~0.90
0.040 max.
0.040 max.
SWRH 62A
0.59~0.66
0.15~0.35
0.30~0.60
0.040 max.
0.040 max.
SWRH 62B
0.59~0.66
0.15~0.35
0.60~0.90
0.040 max.
0.040 max.
SWRH 67A
0.64~0.71
0.15~0.35
0.30~0.60
0.040 max.
0.030 max.
SWRH 67B
0.64~0.71
0.15~0.35
0.60~0.90
0.040 max.
0.030 max.
SWRH 72A
0.69~0.76
0.15~0.35
0.30~0.60
0.040 max.
0.030 max.
SWRH 72B
0.69~0.76
0.15~0.35
0.60~0.90
0.040 max.
0.030 max.
SWRH 77A
0.74~0.81
0.15~0.35
0.30~0.60
0.040 max.
0.030 max.
SWRH 77B
0.74~0.81
0.15~0.35
0.60~0.90
0.040 max.
0.030 max.
SWRH 82A
0.79~0.86
0.15~0.35
0.30~0.60
0.040 max.
0.030 max.
SWRH 82B
0.79~0.86
0.15~0.35
0.60~0.90
0.040 max.
0.030 max.
Remark :If manufacturer and purchaser can reach an agreement, carbon content can be reduced by 0.01% either from the maximum or the minimum figures given in the above table.

SAE/AISI

SAE/AISI
Chemical Composition (%)
C
Mn
P
S
Si
1029
0.25~0.31
0.60~0.90
0.040 max.
0.050 max.
1030
0.28~0.34
0.60~0.90
0.040 max.
0.050 max.
1035
0.32~0.38
0.60~0.90
0.040 max.
0.050 max.
1037
0.35~0.38
0.70~1.00
0.040 max.
0.050 max.
1038
0.35~0.38
0.60~0.90
0.040 max.
0.050 max.
1039
0.37~0.42
0.70~1.00
0.040 max.
0.050 max.
1040
0.37~0.44
0.60~0.90
0.040 max.
0.050 max.
1042
0.40~0.47
0.60~0.90
0.040 max.
0.050 max.
1043
0.40~0.47
0.70~1.00
0.040 max.
0.050 max.
1044
0.43~0.50
0.30~0.60
0.040 max.
0.050 max.
1045
0.43~0.50
0.60~0.90
0.040 max.
0.050 max.
1046
0.43~0.50
0.70~1.00
0.040 max.
0.050 max.
0.10 max.
1049
0.46~0.53
0.60~0.90
0.040 max.
0.050 max.
0.07~0.15
1050
0.48~0.55
0.60~0.90
0.040 max.
0.050 max.
1053
0.48~0.55
0.70~1.00
0.040 max.
0.050 max.
0.10~0.20
1055
0.50~0.60
0.60~0.90
0.040 max.
0.050 max.
0.15~0.30
1059
0.55~0.65
0.50~0.80
0.040 max.
0.050 max.
1060
0.55~0.65
0.60~0.90
0.040 max.
0.050 max.
0.20~0.40
1064
0.60~0.70
0.50~0.80
0.040 max.
0.050 max.
0.30~0.60
1065
0.60~0.70
0.60~0.90
0.040 max.
0.050 max.
1069
0.65~0.75
0.40~0.70
0.040 max.
0.050 max.
1070
0.65~0.75
0.60~0.90
0.040 max.
0.050 max.
1074
0.70~0.80
0.50~0.80
0.040 max.
0.050 max.
1075
0.70~0.80
0.40~0.70
0.040 max.
0.050 max.
1078
0.72~0.85
0.30~0.60
0.040 max.
0.050 max.
1080
0.72~0.88
0.60~0.90
0.040 max.
0.050 max.
1084
0.80~0.93
0.60~0.90
0.040 max.
0.050 max.
1085
0.80~0.93
0.70~1.00
0.040 max.
0.050 max.
1086
0.80~0.93
0.30~0.50
0.040 max.
0.050 max.
1090
0.85~0.98
0.60~0.90
0.040 max.
0.050 max.
1095
0.90~1.03
0.30~0.50
0.040 max.
0.050 max.

3. Spring steel Wire Rod
JIS

Composition (%)
C
Si
Mn
P
S
Cr
Others
SUP 3
0.75~0.90
0.15~0.35
0.30~0.60
0.035 max.
0.035 max.
-
-
SUP 6
0.56~0.64
1.50~1.80
0.70~1.00
0.035 max.
0.035 max.
-
-
SUP 7
0.56~0.64
1.80~2.20
0.70~1.00
0.035 max.
0.035 max.
-
-
SUP 8
0.52~0.60
0.15~0.35
0.65~0.95
0.035 max.
0.035 max.
0.65~0.95
-
SUP 9A
0.56~0.64
0.15~0.35
0.70~1.00
0.035 max.
0.035 max.
0.70~1.00
-
SUP 10
0.47~0.55
0.15~0.35
0.35~0.95
0.035 max.
0.035 max.
0.80~1.10
V:0.15~0.25
SUP 11A
0.56~0.64
0.15~0.35
0.70~1.00
0.035 max.
0.035 max.
0.70~1.00
B: 0.005 min.
SUP 12
0.51~0.59
1.20~1.60
0.60~0.90
0.035 max.
0.035 max.
0.60~0.90
-
SUP 13
0.56~0.64
0.15~0.35
0.15~1.00
0.035 max.
0.035 max.
0.70~0.90
Mo:0.25~0.35

4. Wire Rod for Bearing steel
JIS

Composition (%)
C
Si
Mn
P
S
Cr
Mo
Others
SUP 1
0.95~1.10 0.15~0.35 0.50 max. 0.025 max. 0.025 max. 0.90~1.20 0.08 max.
Cu : 0.20 max.
Ni : 0.25 max.
SUP 2
0.95~1.10 0.15~0.35 0.50 max. 0.025 max. 0.025 max. 1.30~1.60 0.08 max.
SUP 3
0.95~1.10 0.40~0.70 0.90~1.15 0.025 max. 0.025 max. 0.90~1.20 0.08 max.
SUP 4
0.95~1.10 0.15~0.35 0.50 max. 0.025 max. 0.025 max. 1.30~1.60 0.10~0.25
SUP 5
0.95~1.10 0.40~0.70 0.90~1.15 0.025 max. 0.025 max. 0.90~1.20 0.10~0.25

5.Carbon Steel Wire Rod for Cold Heading and Cold Forging
JIS

Composition (%)
C
Si
Mn
P
S
Al
SWRCH 6 A
0.08 max.
0.10 max.
0.60 max.
0.030 max.
0.030 max.
0.02 min.
SWRCH 8 A
0.10 max.
0.10 max.
0.60 max.
0.030 max.
0.030 max.
0.02 min.
SWRCH 10 A
0.08~0.13
0.10 max.
0.30~0.60
0.030 max.
0.030 max.
0.02 min.
SWRCH 12 A
0.10~0.15
0.10 max.
0.30~0.60
0.030 max.
0.030 max.
0.02 min.
SWRCH 15 A
0.13~0.18
0.10 max.
0.30~0.60
0.030 max.
0.030 max.
0.02 min.
SWRCH 16 A
0.13~0.18
0.10 max.
0.60~0.90
0.030 max.
0.030 max.
0.02 min.
SWRCH 18 A
0.15~0.20
0.10 max.
0.60~0.90
0.030 max.
0.030 max.
0.02 min.
SWRCH 19 A
0.15~0.20
0.10 max.
0.70~1.00
0.030 max.
0.030 max.
0.02 min.
SWRCH 20 A
0.18~0.23
0.10 max.
0.30~0.60
0.030 max.
0.030 max.
0.02 min.
SWRCH 22 A
0.18~0.23
0.10 max.
0.70~1.00
0.030 max.
0.030 max.
0.02 min.
SWRCH 10 K
0.18~0.13
0.10~0.35
0.30~0.60
0.030 max.
0.030 max.
-
SWRCH 12 K
0.10~0.15
0.10~0.35
0.30~0.60
0.030 max.
0.030 max.
-
SWRCH 15 K
0.13~0.18
0.10~0.35
0.30~0.60
0.030 max.
0.030 max.
-
SWRCH 16 K
0.13~0.18
0.10~0.35
0.60~0.90
0.030 max.
0.030 max.
-
SWRCH 17 K
0.15~0.20
0.10~0.35
0.30~0.60
0.030 max.
0.030 max.
-
SWRCH 18 K
0.15~0.20
0.10~0.35
0.60~0.90
0.030 max.
0.030 max.
-
SWRCH 20 K
0.18~0.23
0.10~0.35
0.30~0.60
0.030 max.
0.030 max.
-
SWRCH 22 K
0.18~0.23
0.10~0.35
0.70~1.00
0.030 max.
0.030 max.
-
SWRCH 24 K
0.19~0.25
0.10~0.35
1.35~1.65
0.030 max.
0.030 max.
-
SWRCH 25 K
0.22~0.28
0.10~0.35
0.30~0.60
0.030 max.
0.030 max.
-
SWRCH 27 K
0.22~0.29
0.10~0.35
1.20~1.50
0.030 max.
0.030 max.
-
SWRCH 30 K
0.27~0.33
0.10~0.35
0.60~0.90
0.030 max.
0.030 max.
-
SWRCH 33 K
0.30~0.33
0.10~0.35
0.60~0.90
0.030 max.
0.030 max.
-
SWRCH 35 K
0.32~0.38
0.10~0.35
0.60~0.90
0.030 max.
0.030 max.
SWRCH 38 K
0.35~0.41
0.10~0.35
0.60~0.90
0.030 max.
0.030 max.
-
SWRCH 40 K
0.37~0.43
0.10~0.35
0.60~0.90
0.030 max.
0.030 max.
-
SWRCH 41 K
0.36~0.44
0.10~0.35
1.35~1.35
0.030 max.
0.030 max.
-
SWRCH 43 K
0.40~0.46
0.10~0.35
0.60~0.90
0.030 max.
0.030 max.
-
SWRCH 45 K
0.42~0.51
0.10~0.35
0.60~0.90
0.030 max.
0.030 max.
-
SWRCH 48 K
0.45~0.51
0.10~0.35
0.60~0.90
0.030 max.
0.030 max.
-
SWRCH 50 K
0.47~0.53
0.10~0.35
0.60~0.90
0.030 max.
0.030 max.
-

6. Piano Wire Rod
 JIS
 

Chemical Composition (%)
C
Si
Mn
P
S
Cu
SWRS 62 A
0.60~0.65
0.12~0.32
0.30~0.60
0.025 max.
0.025 max.
0.20 max.
SWRS 62 B
0.60~0.65
0.12~0.32
0.60~0.90
0.025 max.
0.025 max.
0.20 max.
SWRS 67 A
0.65~0.70
0.12~0.32
0.30~0.60
0.025 max.
0.025 max.
0.20 max.
SWRS 67 B
0.65~0.70
0.12~0.32
0.60~0.90
0.025 max.
0.025 max.
0.20 max.
SWRS 72 A
0.70~0.75
0.12~0.32
0.30~0.60
0.025 max.
0.025 max.
0.20 max.
SWRS 72 B
0.70~0.75
0.12~0.32
0.60~0.90
0.025 max.
0.025 max.
0.20 max.
SWRS 75 A
0.73~0.78
0.12~0.32
0.30~0.60
0.025 max.
0.025 max.
0.20 max.
SWRS 75 B
0.73~0.78
0.12~0.32
0.60~0.90
0.025 max.
0.025 max.
0.20 max.
SWRS 77 A
0.75~0.80
0.12~0.32
0.30~0.60
0.025 max.
0.025 max.
0.20 max.
SWRS 77 B
0.75~0.80
0.12~0.32
0.60~0.90
0.025 max.
0.025 max.
0.20 max.
SWRS 80 A
0.78~0.83
0.12~0.32
0.30~0.60
0.025 max.
0.025 max.
0.20 max.
SWRS 80 B
0.78~0.83
0.12~0.32
0.60~0.90
0.025 max.
0.025 max.
0.20 max.
SWRS 82 A
0.80~0.85
0.12~0.32
0.30~0.60
0.025 max.
0.025 max.
0.20 max.
SWRS 82 B
0.80~0.85
0.12~0.32
0.60~0.90
0.025 max.
0.025 max.
0.20 max.
SWRS 87 A
0.85~0.90
0.12~0.32
0.30~0.60
0.025 max.
0.025 max.
0.20 max.
SWRS 87 B
0.85~0.90
0.12~0.32
0.60~0.90
0.025 max.
0.025 max.
0.20 max.
SWRS 92 A
0.90~0.95
0.12~0.32
0.30~0.60
0.025 max.
0.025 max.
0.20 max.
SWRS 92 B
0.90~0.95
0.12~0.32
0.60~0.90
0.025 max.
0.025 max.
0.20 max.

7.Free-Cutting Carbon Steel Wire Rod
JIS

Chemical Composition (%)
C
Mn
P
S
Pb
SUM 11
0.08~0.13
0.30~0.60
0.040 max.
0.08~0.13
-
SUM 12
0.08~0.13
0.60~0.90
0.040 max.
0.08~0.13
-
SUM 21
0.13 max.
0.70~1.00
0.07~0.12
0.08~0.13
-
SUM 22
0.13 max.
0.70~1.00
0.07~0.12
0.08~0.13
-
SUM 23
0.09 max.
0.75~1.05
0.04~0.09
0.08~0.13
-
SUM 25
0.15 max.
0.90~1.40
0.07~0.12
0.08~0.13
-
SUM 31
0.14~0.20
1.00~1.30
0.040 max.
0.08~0.13
-
SUM 32
0.12~0.20
0.60~1.10
0.040 max.
0.08~0.13
-
SUM 41
0.32~0.39
1.35~1.65
0.040 max.
0.08~0.13
-
SUM 42
0.37~0.45
1.35~1.65
0.040 max.
0.08~0.13
-
SUM 43
0.40~0.48
1.35~1.65
0.040 max.
0.08~0.13
-

SAE/AISI

Chemical Composition (%)
C
Si
Mn
P
S
1108
0.08~0.13
-
0.50~0.80
0.040 max.
0.08~0.13
1110
0.08~0.13
0.10 max.
0.30~0.60
0.040 max.
0.08~0.13
1117
0.14~0.20
-
1.00~1.30
0.040 max.
0.08~0.13
1118
0.12~0.20
-
1.30~1.60
0.040 max.
0.08~0.13
1137
0.32~0.39
0.10 max.
1.35~1.65
0.040 max.
0.08~0.13
1139
0.35~0.43
0.10 ~0.20
1.35~1.65
0.040 max.
0.13~0.20
1140
0.37~0.44
0.15~0.35
0.70~1.00
0.040 max.
0.08~0.13
1141
0.37~0.45
-
1.35~1.65
0.040 max.
0.08~0.13
1144
0.42~0.48
-
1.35~1.65
0.040 max.
0.24~0.33
1146
0.40~0.49
-
0.70~1.00
0.040 max.
0.08~0.13
1151
0.48~0.55
-
0.70~1.00
0.040 max.
0.08~0.13
1211
0.13 max.
-
0.60~0.90
0.070~0.12
0.10~0.15
1212
0.13 max.
-
0.70~1.00
0.070~0.12
0.16~0.23
1213
0.13 max.
-
0.70~1.00
0.070~0.12
0.24~0.33
1214
0.09 max.
-
0.75~1.05
0.04~0.09
0.26~0.35
1215
0.09 max.
-
0.75~1.05
0.04~0.09
0.26~0.35

8. Alloy Steel for Machine Structural Use
JIS

Chemical Composition (%)
C
Si
Mn
P
S
Ni
Cr
Mo
Ni-Cr
SNC 236
0.32~0.40
0.15~0.35
0.500~0.80
0.030 max
0.030 max
1.00~1.50
0.50~0.90
Cu
0.30 max
SNC 415
0.12~0.18
0.35~0.65
2.00~2.50
2.00~2.50
SNC 631
0.27~0.35
2.50~3.00
0.60~1.00
SNC 815
0.12~0.18
3.00~3.50
0.70~1.00
SNC 836
0.32~0.40
0.60~1.00
Ni-Mo
SNCM 220
0.17~0.23
0.15~0.35
0.60~0.90
0.030 max
S
0.030 max


Cu
0.030 max
0.40~0.70
0.40~0.65
0.15~0.30
SNCM 240
0.38~0.43
0.70~1.00
SNCM 415
0.12~0.18
0.40~0.70
1.60~2.00
SNCM 420
0.17~0.23
SNCM 431
0.27~0.35
0.60~0.90
0.60~1.00
SNCM 439
0.36~0.43
SNCM 447
0.44~0.50
SNCM 616
0.13~0.20
0.80~1.20
2.80~3.20
1.40~1.80
0.40~0.60
SNCM 625
0.20~0.30
0.35~0.60
3.00~3.50
1.00~1.50
0.15~0.30
SNCM 630
0.25~0.35
2.50~3.50
2.50~3.50
0.50~0.70
SNCM 815
0.12~0.18
0.30~0.60
4.00~4.50
0.70~1.00
0.15~0.30
Cr
SCr 415
0.13~0.18
0.15~0.35
0.60~0.85
0.030 max
0.030 max
Ni
0.25 max

Cu
0.30 max
0.90~1.20
Cu
0.30 max
SCr 420
0.18~0.23
SCr 430
0.28~0.33
SCr 435
0.33~0.38
SCr 440
0.38~0.43
SCr 445
0.43~0.48
Cr-Mo
SCM 415
0.13~0.18
0.15~0.35
0.60~0.85
0.030 max
0.030 max
0.25 max
0.90~1.20
0.15~0.30
SCM 418
0.16~0.21
SCM 420
0.18~0.23
SCM 421
0.17~0.23
0.70~1.00
SCM 430
0.28~0.33
0.60~0.85
SCM 432
0.27~0.37
0.30~0.60
1.00~1.50
SCM 435
0.33~0.38
0.60~0.85
0.90~1.20
SCM 440
0.38~0.43
SCM 445
0.43~0.48
SCM 822
0.20~0.25
0.35~0.45
Mn
SMn 420
0.17~0.23
0.15~0.35
1.20~1.50
0.030 max
0.030 max
0.25 max
0.035max
Cu
0.30 max
SMn 433
0.30~0.36
SMn 438
0.35~0.41
1.35~1.65
SMn 443
0.40~0.46
Mn-Cr
SMnC 420
0.17~0.23
1.20~1.50
0.35~0.70
SMnC 443
0.40~0.46
1.35~1.65

SAE/AISI

Chemical Composition (%)
C
Si
Mn
P
S
Ni
Cr
Mo
1513
0.10~0.16
-
0.10~1.40
0.040 max.
0.050 max.
-
-
-
1522
0.18~0.24
0.10 max.
1.10~1.40
0.040 max.
0.050 max.
-
-
-
1524
0.19~0.25
0.07~0.15
0.35~1.65
0.040 max.
0.050 max.
-
-
-
1526
0.22~0.29
0.10~0.20
1.10~1.40
0.040 max.
0.050 max.
-
-
-
1527
0.22~0.29
1.50~0.35
1.20~1.50
0.040 max.
0.050 max.
-
-
-
1536
0.30~0.37
0.20~0.40
1.30~1.50
0.040 max.
0.050 max.
-
-
-
1541
0.36~0.44
1.35~0.65
1.35~1.50
0.040 max.
0.050 max.
-
-
-
1548
0.44~0.52
1.10~0.40
1.10~1.40
0.040 max.
0.050 max.
-
-
-
4118
0.18~0.23
0.15~0.35
0.70~0.90
0.035 maX.
0.040 max.
-
0.40~0.60
0.08~0.60
4130
0.28~0.33
0.15~0.35
0.40~0.60
0.035 maX.
0.040 max.
-
0.80~1.10
0.15~0.25
4135
0.33~0.38
0.15~0.35
0.70~0.90
0.035 maX.
0.040 max.
-
0.80~1.10
0.15~0.25
4137
0.35~0.40
0.15~0.35
0.70~1.00
0.035 maX.
0.040 max.
-
0.80~1.10
0.15~0.25
4140
0.38~0.43
0.15~0.35
0.75~1.00
0.035 maX.
0.040 max.
-
0.80~1.10
0.15~0.25
4132
0.40~0.45
0.15~0.35
0.75~1.00
0.035 maX.
0.040 max.
-
0.80~1.10
0.15~0.25
4145
0.43~0.48
0.15~0.35
0.75~1.00
0.035 maX.
0.040 max.
-
0.80~1.10
0.15~0.25
4147
0.45~0.50
0.15~0.35
0.75~1.00
0.035 maX.
0.040 max.
-
0.80~1.10
0.15~0.25
4150
0.48~0.53
0.15~0.35
0.75~1.00
0.035 maX.
0.040 max.
-
0.80~1.10
0.15~0.25
4161
0.56~0.64
0.15~0.35
0.75~1.00
0.035 maX.
0.040 max.
-
0.70~0.90
0.15~0.25
5115
0.12~0.17
0.15~0.35
0.30~0.50
0.035 maX.
0.040 max.
0.40~0.70
0.30~0.50
-
5120
0.17~0.22
0.15~0.35
0.70~0.90
0.035 maX.
0.040 max.
0.40~0.70
0.70~0.90
-
5130
0.28~0.33
0.15~0.35
0.70~0.90
0.035 maX.
0.040 max.
0.40~0.70
0.80~1.10
-
5132
0.30~0.35
0.15~0.35
0.60~0.80
0.035 maX.
0.040 max.
0.40~0.70
0.75~1.00
-
5135
0.33~0.38
0.15~0.35
0.60~0.80
0.035 maX.
0.040 max.
0.40~0.70
0.80~1.05
-
5140
0.38~0.43
0.15~0.35
0.70~0.90
0.035 maX.
0.040 max.
0.40~0.70
0.70~0.90
-
5145
0.43~0.48
0.15~0.35
0.70~0.48
0.035 maX.
0.040 max.
0.40~0.70
0.70~0.90
-
8620
0.18~0.23
0.15~0.35
0.70~0.90
0.035 maX.
0.040 max.
0.40~0.70
0.40~0.60
0.15~0.25
8622
0.20~0.25
0.15~0.35
0.70~0.90
0.035 maX.
0.040 max.
0.40~0.70
0.40~0.60
0.15~0.25
8625
0.23~0.28
0.15~0.35
0.70~0.90
0.035 maX.
0.040 max.
0.40~0.70
0.40~0.60
0.15~0.25
8627
0.25~0.30
0.15~0.35
0.70~0.90
0.035 maX.
0.040 max.
0.40~0.70
0.40~0.60
0.15~0.25
8630
0.28~0.33
0.15~0.35
0.70~0.90
0.035 maX.
0.040 max.
0.40~0.70
0.40~0.60
0.15~0.25
8637
0.35~0.40
0.15~0.35
0.75~1.00
0.035 maX.
0.040 max.
0.40~0.70
0.40~0.60
0.15~0.25
8640
0.38~0.43
0.15~0.35
0.75~1.00
0.035 maX.
0.040 max.
0.40~0.70
0.40~0.60
0.15~0.25
8642
0.40~0.45
0.15~0.35
0.75~1.00
0.035 maX.
0.040 max.
0.40~0.70
0.40~0.60
0.15~0.25
8645
0.43~0.48
0.15~0.35
0.75~1.00
0.035 maX.
0.040 max.
0.40~0.70
0.40~0.60
0.15~0.25

9. Carbon Steel Wire Rod for Machine Structural Use
JIS

Chemical Composition (%)
C
Si
Mn
P
S
S10C
0.80~0.13
0.15~0.35
0.30~0.60
0.030 max.
0.035 max.
S12C
0.10~0.15
0.15~0.35
0.30~0.60
0.030 max.
0.035 max.
S15C
0.13~0.18
0.15~0.35
0.30~0.60
0.030 max.
0.035 max.
S17C
0.15~0.20
0.15~0.35
0.30~0.60
0.030 max.
0.035 max.
S20C
0.18~0.23
0.15~0.35
0.30~0.60
0.030 max.
0.035 max.
S22C
0.20~0.25
0.15~0.35
0.30~0.60
0.030 max.
0.035 max.
S25C
0.22~0.28
0.15~0.35
0.30~0.60
0.030 max.
0.035 max.
S28C
0.25~0.31
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S30C
0.27~0.33
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S33C
0.30~0.36
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S35C
0.32~0.38
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S38C
0.35~0.41
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S40C
0.37~0.43
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S43C
0.40~0.46
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S45C
0.42~0.48
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S48C
0.45~0.51
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S50C
0.47~0.53
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S53C
0.50~0.56
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S55C
0.52~0.58
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S58C
0.56~0.61
0.15~0.35
0.60~0.90
0.030 max.
0.035 max.
S09CK
0.07~0.12
0.15~0.35
0.30~0.60
0.025 max.
0.025 max.
S15CK
0.13~0.18
0.15~0.35
0.30~0.60
0.025 max.
0.025 max.
S20CK
0.18~0.23
0.15~0.35
0.30~0.60
0.025 max.
0.025 max.
Remark:
  1. For standards S09CK, S15CK, and S20CK, the content of Cu, Ni, Cr, and Ni+Cr should not exceed 0.25% 0.20%, 0.20%, and 0.30%, respectively. As for other standards, each element should not exceed the content of 0.30%, 0.20%, .020%, and 0.65%, respectively.
  2. .In case customers request product analysis on steel, the analysis tolerance should conform to Table 2 in JIS G 0321.

10. Wire Rod For Core Wire of Covered Electrodes
JIS

Chemical Composition (%)
C
Si
Mn
P
S
Cu
Al
Ti+Zr
SWRY 11
0.09 max.
0.03 max.
0.35~0.65
0.020 max.
0.023 max.
0.20 max.
-
-
SWRY 21
0.10~0.15
0.03 max.
0.35~0.65
0.020 max.
0.023 max.
0.20 max.
-
-
YGW 11
0.15 max.
0.55~1.10
1.40~1.90
0.030 max.
0.030 max.
0.50 max.
0.10 max.
0.30 max.
YGW 12
0.15 max.
0.55~1.10
1.25~1.90
0.030 max.
0.030 max.
0.50 max.
-
-
YGW 13
0.15 max.
0.55~1.10
1.35~1.90
0.030 max.
0.030 max.
0.50 max.
0.10~0.50
0.30 max.
YGW 14
0.15 max.
-
-
0.030 max.
0.030 max.
0.50 max.
-
-
YGW 15
0.15 max.
0.40~1.00
1.00~1.60
0.030 max.
0.030 max.
0.50 max.
0.10 max.
0.30 max.
YGW 16
0.15 max.
0.40~1.00
0.85~1.60
0.030 max.
0.030 max.
0.50 max.
-
-
YGW 17
0.15 max.
-
-
0.030 max.
0.030 max.
0.50 max.
-
-
YGW 21
0.15 max.
0.50~1.10
1.30~2.60
0.025 max.
0.025 max.
0.50 max.
0.10 max.
0.30 max.
YGW 22
0.15 max.
-
-
0.025 max.
0.025 max.
0.50 max.
-
-
YGW 23
0.15 max.
0.30~1.00
0.90~2.30
0.025 max.
0.025 max.
0.50 max.
-
0.20 max.
YGW 24
0.15 max.
-
-
0.025 max.
0.025 max.
0.50 max.
-
-
YGW 11
0.10 max.
0.05 max.
0.20~0.80
0.030 max.
0.030 max.
-
-
-
YGW 21
0.13 max.
0.05 max.
0.80~1.30
0.030 max.
0.030 max.
-
-
-
YGW 22
0.13 max.
0.05~0.25
0.80~1.30
0.030 max.
0.030 max.
-
-
-
YGW 23
0.13 max.
0.25~0.45
0.80~1.30
0.030 max.
0.030 max.
-
-
-
YGW 31
0.15 max.
0.05 max.
1.30~1.80
0.030 max.
0.030 max.
-
-
-
YGW 32
0.15 max.
0.05~0.25
0.20~0.80
0.030 max.
0.030 max.
-
-
-
YGW 41
0.17 max.
0.05 max.
1.80~2.20
0.030 max.
0.030 max.
-
-
-

POSCO Standards
High Strength Steel Wire Rod

Chemical Composition (%)
C
Si
Mn
P
S
Cu
Ti
B
Class
1
PSPC30B
0.27~0.32
0.15~0.35
0.60~0.90
0.035 max.
0.030 max.
0.20 max.
-
5PPM and over
PSPC32B
0.29~0.34
0.15~0.35
0.60~0.90
0.035 max.
0.030 max.
0.20 max.
-
5PPM and over
PSPC35B
0.32~0.38
0.15~0.35
0.60~0.90
0.035 max.
0.030 max.
0.20 max.
-
-
class
2
PSPC30Si
0.27~0.32
1.60~1.90
0.60~0.90
0.035 max.
0.030 max.
0.20 max.
-
-
PSPC32si
0.29~0.34
1.60~1.90
0.60~0.90
0.035 max.
0.030 max.
0.20 max.
-
-
PSPC35Si
0.32~0.38
1.60~1.90
0.60~0.90
0.035 max.
0.030 max.
0.20 max.
-
-

Wire Rod for Tire Cord

Chemical Composition (%)
C
Si
Mn
P
S
Cr
Class 1
POSCORD70
0.65~0.75
0.15~0.30
0.40~0.80
0.020 max.
0.15 max.
-
POSCORD70S
0.65~0.75
0.15~0.30
0.40~0.80
0.020 max.
0.15 max.
-
Class 2
POSCORD80
0.75~0.88
0.15~0.30
0.40~0.80
0.020 max.
0.15 max.
-
POSCORD80S
0.75~0.88
0.15~0.30
0.40~0.80
0.020 max.
0.15 max.
-

Wire Rod for Core Wire of Covered Electrodes

Chemical Composition (%)
C
Si
Mn
P
S
Ni
Cr
Ti+Zr
POSWELD1A
0.15 max.
0.40~1.60
0.85~1.60
0.030 max.
0.030 max.
0.50 max.
-
-
POSWELD1A
0.15 max.
0.40~1.60
1.00~1.60
0.030 max.
0.030 max.
0.50 max.
0.10 max.
0.13 max.
POSWELD1A
0.15 max.
0.55~1.10
1.25~1.90
0.030 max.
0.030 max.
0.50 max.
-
-
POSWELD1A
0.15 max.
0.55~1.10
1.40~1.90
0.030 max.
0.030 max.
0.50 max.
0.10 max.
0.30 max.
POSWELD1A
0.15 max.
0.55~1.10
1.35~1.90
0.030 max.
0.030 max.
0.50 max.
0.10~0.50
0.30 max.
POSWELD1A
0.15 max.
0.30~1.00
0.90~2.30
0.025 max.
0.025 max.
0.50 max.
-
0.30 max.
POSWELD1A
0.15 max.
0.50~1.10
1.30~2.60
0.025 max.
0.025 max.
0.50 max.
0.10 max.
0.20 max.
POSWELD1A
0.15 max.
-
-
0.025 max.
0.025 max.
0.50 max.
-
0.30 max.
POSWELD1A
0.10 max.
0.05 max.
0.20~0.80
0.030 max.
0.030 max.
-
-
-
POSWELD1A
0.13 max.
0.05 max.
0.80~1.30
0.030 max.
0.030 max.
-
-
-
POSWELD1A
0.13 max.
0.05~0.25
0.80~1.30
0.030 max.
0.030 max.
-
-
-
POSWELD1A
0.13 max.
0.25~0.45
0.80~1.30
0.030 max.
0.030 max.
-
-
-
POSWELD1A
0.15 max.
0.05 max.
1.30~1.80
0.030 max.
0.030 max.
-
-
-
POSWELD1A
0.15 max.
0.05~0.25
1.30~1.80
0.030 max.
0.030 max.
-
-
-
POSWELD1A
0.15 max.
0.05max.
1.80~2.20
0.030 max.
0.030 max.
-
-
-

Deep Drawing Wire Rod for Cold Heading Quality

Chemical Composition (%)
C
Mn
Si
P
S
S-Al
POSCH6ASP
0.08
and under
0.25~0.40
0.07 and under
0.030 and under
0.030 and under
0.020 and over

Wire Rod for Soft Magnetic Iron Bar

Chemical Composition (%)
C
Mn
Si
P
S
SUYB1
0.01 and under
0.02~0.03
0.02 and under
0.020 and under
0.015 and under

Normalized High Strength Steel Wire Rod

Chemical Composition (%)
C
Mn
Si
P
S
Mo
S-Al
V
N(ppm)
PNCH7
0.15~0.21
1.10~1.60
0.15~0.30
0.030
and under
0.030 and under
-
-
-
-
POSMA40
0.35~0.44
0.80~1.20
0.40~0.90
0.025
and under
0.02~0.08
1.0 and under
0.01~0.08
0.08~0.12
15and under

Corrosion Resistant Steel Wire Rod

Chemical Composition (%)
C
Mn
Si
P
S
Cu
Ni
S-Al
Cr
B(ppm)
POSTEN20W
0.20~0.25
0.72~0.90
0.15~0.25
0.030
and under
0.030
and under
0.30~0.50
0.3~0.5
0.03~0.05
0.6~0.9
10~30

Wire Rod for Oil Tempered Wire

Chemical Composition (%)
C
Mn
Si
P
S
Cu
POT62C
0.60~0.65
0.85~1.15
0.15~0.30
0.020 and under
0.020 and under
0.05 and under
POT67C
0.65~0.70
"
"
"
"
"

Free Cutting Steel Wire Rod

Chemical Composition (%)
C
Mn
Si
P
S
Bi
POSCUT1A
0.13 and under
0.90~1.20
-
0.06~0.12
0.24~0.33
0.30 and over

Wire Rod for Steel Wool

Chemical Composition (%)
C
Mn
Si
P
S
PSW10
0.08~0.13
0.60~0.90
0.15 and under
0.06~0.10
0.035 and over




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