Spring steel
All kinds of heavy machinery, trains, cars, locomotives, and various coil and straight springs have the characteristics of high elastic winding after proper heat treatment.
1.Ingredient:
| Steel Grade |
C |
Si |
Mn |
P |
S |
| SUP3 |
0.75-0.90 |
0.15-0.35 |
0.30-0.60 |
<0.035 |
<0.035 |
2.Equivalent steel:
| Equivalent steel |
JIS |
AISI |
DIN |
GB |
| |
SUP3 |
1086 |
CK85 |
85 |
3.Heat treatment:
| Normalization |
Annealing |
Quenching |
Tempering |
| |
|
830-860 Oil Cooling |
450-500 Air cooling |
4.Mechanical properties:
| Yielding Strength (Mpa) |
Tensile Strength (Mpa) |
Elongation (%) |
Hardness (HBW) |
| >885 |
980 |
>8 |
341~401 |
5.Origin Place:Japan,China
