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Flats Steel

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Steel grades
Chemical composition,%
C
Si
Mn
P
S
Cr
Ni
Mo
V
W
Cu
Cu+Ni
Plastic Mold Steel
M50C
0.47-
0.53
0.17-
0.37
0.50-
0.80

0.030

0.030

0.30

0.55
P20
0.36-
0.42
0.20-
0.80
0.60-
1.20

0.025

0.015
12.00-
14.00
 
0.30-
0.55
 
 

0.30

0.55
P768R
0.36-
0.42
0.20-
0.80
1.00-
1.50

0.025

0.015
12.00-
14.00
0.80-
1.20
0.30-
0.55
 
 

0.30
 
P166R
0.35-
0.45

1.00

0.80

0.025

0.015
1.40-
2.00
0.80-
1.20
1.30-
0.55
 
 

0.30
 
Cold Work
D2
1.40-
1.60
0.10-
0.60
0.10-
0.60
≤0.030
≤0.030
11.00-
13.00
 
0.70-
1.20
0.50-
1.10
 
 
≤0.75
SKD11
1.40-
1.60
≤0.40
≤0.60
≤0.030
≤0.030
11.00-
13.00
 
0.80-
1.20
0.20-
0.50
 
≤0.30
≤0.55
O1
0.85-
1.00
0.10-
0.50
1.00-
1.40-
≤0.030
≤0.030
0.40-
0.70
 
 
≤0.360
0.40-
0.60
 
≤0.75
Hot Work Steel
H13
0.32-
0.45
0.80-
1.15
0.20-
0.60
≤0.030
≤0.030
4.75-
5.50
 
1.10-
1.75
0.80-
1.20
 
 
≤0.75
High Speed Tool Steel
M2
0.80-
0.90
0.20-
0.45
0.15-
0.40
≤0.030
≤0.015
3.80-
4.40
 
4.50-
5.50
1.75-
2.20
5.50-
6.75
≤0.30
≤0.55
 
Deliver Hardness
 
No.
Steel Grade
Hardness HB(HRC)
Quenched & Tempered condition
Annealed condition(Normalized)
1
M50C
 
200-245HB(正火(Normalized)
2
P20
285-330HB(30-36HRC)
≤235HB
3
P768R
285-330HB(30-36HRC)
≤235HB
4
P166R
285-330HB(30-36HRC)
≤229HB
7
D2
≤235HB
10
SKD11
≤235HB
12
O1
≤235HB
14
M2
≤255HB
16
H13
≤235HB
 

Delivery Size

 

Width (mm)/ Thickness (mm)
200
250
300
350
400
450
500
 
20
25
30
40
50
60
70
80
90
105
115
125
 
 
注:●Regular Sizes Made for Special Orders