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:
1) 1.0*30mm, 1.0*40mm,1.0*45mm, 1.0*50mm, 1.0*55mm, 1.0*60mm,
2) 1.1*60mm,
3) 1.2*40mm, 1.2*45mm, 1.2*50mm, 1.2*55mm, 1.2*60mm,
4) 1.3*45mm, 1.3*50mm, 1.3*55mm, 1.3*60mm,
5) 1.4*40mm, 1.4*45mm, 1.4*50mm, 1.4*55mm, 1.4*60mm, 1.4*80mm,
6) 1.6*60mm, 1.6*80mm
7) 1.8*80mm
8) other OEM size is accepted
Hardness: 44-48HRC
Surface polish: blue
Edge: round
Chemical Composition
Carbon | Manganese | Nickel | Silicon | Phosphorus | Sulfur | Chromium | Copper |
C | Mn | Ni | Si | P | S | Cr | Cu |
0.72~0.80 | 0.50~0.80 | ≤0.30 | 0.17~0.37 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.25 |
Mechanical Properties
Tensile strength σb (MPa)≥1080
Yield strength σs (MPa)≥880
Elongation δ5 (%)≥7
Area shrinkage ψ (%)≥30
Hardness HBS: unheated ≤285 Annealed steel≤241