Specification

HOME > Steel Heat Treatment > Specification

Chemical Composition

Designation
Chemical Composition (%)
C
Si
Mn
P
S
Cu
Ni
Cr
JIS SK5M
0.80
-0.90
0.35↓
0.50↓
0.030↓
0.030↓
0.030↓
0.25↓
0.20↓
JIS SK5M
0.60
-0.70
0.35↓
0.50↓
0.030↓
0.030↓
0.030↓
0.25↓
0.20↓
SAE1065
0.59
-0.70

0.15
-0.30

0.60
-0.90

0.040↓
0.050↓
0.030↓
0.25↓
0.20↓

Dimension

  4" (101.6m/m)

5" (127m/m)

6" (152.4m/m)

8" (203.2m/m)

10" (254m/m)

12" (304.8m/m)

0.05
0.10  
0.15  
0.20  
0.25  
0.30    
0.35  
0.40      
0.45  
0.50        
0.55  
0.60        
0.65  
0.7  
0.8      
0.9  
1.0        
1.2      
1.5  
1.6  
2.0
In Stock  Please Consult Factory Not Available

Unhardened Material

Material
Annealed
R
Hardness
Tensile/Strength kg/mm²
Elongation%
Hardness
SK5M
200↓
70↓
20%↑
220°-280°
SK7M
190↓
60↓
25%↑
200°-260°

Martensite Hardened Material

The tensile strength of martensite hardened steel strip varies from 100Kg/mm² to 220Kg/mm² for SK5M and from 92KG/mm² to 210Kg/mm² for SK7M which will depend on customers special requirements. Our standard hardness which varies which the thickness of the material is shown below.

Thickness In m/m
Vickers
Rockwell C Scale (HRC)
Shore (HS)
Up to 0.1
HV620°±20°
(56°)
(75°)
0.2
HV600°±20°
(55°)
(74°)
0.3
HV580°±20°
(54°)
(72°)
0.4
HV560°±20°
(53°)
(71°)
0.5
HV550°±20°
(52°)
(70°)
0.6
HV530°±20°
(51°)
(68°)
0.7
HV510°±20°
(50°)
(66.5°)
0.8
HV500°±20°
(49°)
(66°)
0.9
HV485°±20°
(48°)
(64°)
1.0
HV470°±20°
(47°)
(63°)
1.1 and over
HV460°±20°
(46°)
(62°)
(  ) only for reference

Bainite Hardened Material
The hardness of the bainite hardened material ranges from HV280X to 450X which will be as per customer´s special order.

Finish: Bright white or bright blue

Thickness Tolerance
Thickness
Width200↓
Width200-500
0.25-0.60
±0.15
±0.25
0.60-1.20
±0.20
±0.30
1.20-4.00
±0.25
±0.40
The strips with thickness of 0.25mm or less will be as per the agreement between the buyer and seller.