DescriptionSpring Steel is typically used because of its' high yield strengths, resistance to deformation and its ability to return to its original shape.All Grades Comparison
| GB |
ASTM |
JIS |
EN |
DIN |
| 55 |
1055 |
/ |
CK55 |
1.1204 |
| 60 |
1060 |
/ |
CK60 |
1.1211 |
| 70 |
1070 |
/ |
CK67 |
1.1231 |
| 75 |
1075 |
/ |
CK75 |
1.1248 |
| 85 |
1086 |
SUP3 |
CK85 |
1.1269 |
| T10A |
1095 |
SK4 |
CK101 |
1.1274 |
| 65Mn |
1066 |
/ |
/ |
/ |
| 60Si2Mn |
9260 |
SUP6,SUP7 |
61SiCr7 |
60SiCr7 |
| 50CrVA |
6150 |
SUP10A |
51CrV4 |
1.8159 |
Quality StandardDIN 17222 Cold Rolled Steel Strips for Springs Technical Conditions of Delivery
BS EN 10132 Cold rolled narrow steel strip for heat treatment. Technical delivery conditionsChemical Composition(%)
| Steel Grade |
C |
Mn |
Si |
P |
S |
Cr |
Ni |
B |
Cu |
Mo |
V |
| 55 |
0.52-0.60 |
0.50-0.80 |
0.17-0.37 |
0.035 max |
0.035 max |
0.25 max |
0.30 max |
/ |
0.25 max |
/ |
/ |
| 65 |
0.62-0.70 |
0.50-0.80 |
0.17-0.37 |
0.035 max |
0.035 max |
0.25 max |
0.25 max |
/ |
0.25 max |
/ |
/ |
| 70 |
0.62-0.75 |
0.50-0.80 |
0.17-0.37 |
0.035 max |
0.035 max |
0.25 max |
0.25 max |
/ |
0.25 max |
/ |
/ |
| 75 |
0.72-0.80 |
0.50-0.80 |
0.17-0.37 |
0.035 max |
0.035 max |
0.25 max |
0.30 max |
/ |
0.25 max |
/ |
/ |
| 85 |
0.95-1.04 |
0.40 max |
0.35 max |
0.025 max |
0.025 max |
/ |
/ |
/ |
/ |
/ |
/ |
| 65Mn |
0.62-0.70 |
0.90-1.20 |
0.17-0.37 |
0.035 max |
0.035 max |
0.25 max |
0.25 max |
/ |
0.25 max |
/ |
/ |
| 60Si2Mn |
0.56-0.64 |
0.70-1.00 |
1.50-2.00 |
0.035 max |
0.035 max |
0.35 max |
0.25 max |
/ |
0.25 max |
/ |
/ |
| 50CrVA |
0.46-0.54 |
0.50-0.80 |
0.17-0.37 |
0.025 max |
0.025 max |
0.80-1.10 |
0.35 max |
/ |
0.25 max |
/ |
0.10-0.20 |
Mechanical Properties(Quenched and Tempered Condition)(T=20°C if not differently stated)
| Steel Grade |
Tensile Strength Rm (Mpa) |
Yield Strength Rp0.2 (Mpa) |
Elongation A5 (%) |
Area Reduction Ratio C (%) |
| 65 |
980 min |
785 min |
9 min |
35 min |
| 70 |
1030 min |
835 min |
8 min |
30 min |
| 85 |
1130 min |
980 min |
6 min |
30 min |
| 65Mn |
980 min |
785 min |
8 min |
30 min |
| 60Si2Mn |
1275 min |
1180 min |
5 min |
25 min |
| 50CrVA |
1275 min |
1130 min |
10 min |
40 min |
Delivery ConditionsCold Rolled only
Cold Rolled+Soft Annealed (G)
Cold Rolled+Soft Annealed+Cold Rolled (G+K)
Cold Rolled+Hardened+Tempered (H+A)Surface ConditionsGrey Blue (GR)
Bright (BK)
Polished (P)
Polished and Colour Tempered (P+AF)Heat Treatment
| Steel Grade |
Quenching Temperature (°C) |
Media |
Tempering Temperature (°C) |
| 65 |
840 |
oil |
500 |
| 70 |
830 |
oil |
480 |
| 85 |
820 |
oil |
480 |
| 65Mn |
830 |
oil |
540 |
| 60Si2Mn |
870 |
oil |
480 |
| 50CrVA |
850 |
oil |
500 |
Mill′s test certificate:EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
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