Customization: | Available |
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Standard: | ASTM, JIS, GB, AISI, DIN, BS |
Surface Treatment: | Polished |
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Thickness Tolerance
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+/-0.01mm
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Width Tolerance
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+/-0.05mm
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Surface
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nature, blue, yellow, white, polished, white polised, bright, black
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Coils weight
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as your request
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MOQ
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3 Tons
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Delivery Time
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Delivery Time 30-35 Workdays |
Monthly capacity
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1500 Tons
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Package
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Standard Seaworthy Package |
Payment
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L/C, Western Union, D/P, D/A, T/T, MoneyGram etc.
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Application
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band saw blade, rolling shutter spring, bricklayer trowel, plaster trowel, putty knives, scraper, power trowel blade, lawn trowel blade, shoe insole, flat spring, toy spring, spring baskets etc.
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Common Size for rolling shutter door spring steel:
Thickness: 1.0-1.8mm
Width: 30/40/45/50/55/60/80mm etc.
Other OEM size is accepted
Hardness: 44-48HRC
Surface polish: blue
Edge: round
Chemical Composition | |||||||
C67 | Carbon | Manganese | Nickel | Silicon | Phosphorus | Sulfur | Chromium |
C | Mn | Ni | Si | P | S | Cr | |
0.62~0.70 | 0.90~1.20 | ≤0.30 | 0.17~0.37 | ≤0.035 | ≤0.035 | ≤0.25 |
Mechanical Properties | |||||||
C67 | Tensile strength σb (MPa) |
Yield strength σs (MPa) |
Elongation δ10 (%) |
Area shrinkage ψ (%) |
Hardness HB | ||
Hot Rolling |
Cold Drawing |
Heat Treatment |
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≥980(100) | ≥784(80) | ≥8 | ≥30 | ≤302 | ≤321 | ≤321 |