Spring Steel For Rolling Shutter
HARDENED AND TEMPERED STEEL STRIPS
FOR
ROLLING
SHUTTER
SPECIFICATION
| Carbon |
: |
0.75 - 0.85 % |
| Manganese |
: |
0.60 - 0.90 % |
| Silicon |
: |
0.35% Max |
| Sulphur |
: |
0.04% Max |
| Phosphorus |
: |
0.4% Max |
| Hardness |
: |
45-48 HRC |
| Tensile Strength |
: |
145-160 kg/mm2 |
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