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Thickness Tolerance
|
+/-0.01mm
|
|
Width Tolerance
|
+/-0.05mm
|
|
Surface
|
nature, blue, yellow, white, polished, white polised, bright, black
|
|
Coils weight
|
as your request
|
|
MOQ
|
3 Tons
|
|
Delivery Time
|
Delivery Time 30-35 Workdays |
|
Monthly capacity
|
1500 Tons
|
|
Package
|
Standard Seaworthy Package |
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Payment
|
L/C, Western Union, D/P, D/A, T/T, MoneyGram etc.
|
|
Application
|
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.
|
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 |
|||||
| ≥980(100) | ≥784(80) | ≥8 | ≥30 | ≤302 | ≤321 | ≤321 | |