Customization: | Available |
---|---|
Standard: | ASTM, JIS, GB, AISI, DIN, BS |
Surface Treatment: | Polished |
Still deciding? Get samples of US$ 1/Piece
Request Sample
|
Suppliers with verified business licenses
Audited by an independent third-party inspection agency
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 |
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 | ||||||||
C75 | 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 | ||||||
C75 | Tensile strength σb (MPa) |
Yield strength σs (MPa) |
Elongation δ5 (%) |
Area shrinkage ψ (%) |
Hardness HBS | |
Unheated | Annealed | |||||
≥1080 | ≥880 | ≥7 | ≥30 | ≤285 | ≤241 |