Our Products
stainless and martensitic strips 0.08 - 0.8 mm
Hardening
of strip steel and flatwire of 2 - 30 mm width
Cutting
of steel, aluminium, copper and brass strips
Production
cutting, deburring, hardening and lacquering
Production
Innovative machines for strip steel production. Developed by Cobra Engineering.
Slittering Line
Circular Shears
Hardening
H-Hardening Plant
Edges and Surfaces
Lacquering
Cambering
Spooling
Strip Steel Coil Calculator
Use our Cobra Coil Calculator to get you coil weight and length easily.
Enter strip width and thickness
Move over the counter to stop
Inner and outer diameter of single coil
Resulting weight of single coil
Enter strip width and thickness
Move over the counter to stop
Inner and outer diameter of single coil
Resulting weight of single coil
Also check out our handy Camber Calculator to get the non-linear deviation of straightness for any strip steel length.
Specifications
Our products for your application.
- Width: 2 – 30 mm
- Thickness: 0.06 – 0.8 mm
Width tolerance
- Standard tolerance: + 0.1 – 0.15 mm
- Extended tolerance: ± 0.02 mm
Thickness tolerance
- In accordance with EN 10140
- Optional extended tolerances T3, T4
Surface
- bright hardened
- yellow/blue tempered
- phosphate treated, lacquered
- bright polished
- brushed
Edges
- neat cut
- deburred
- rounded
Cold rolled and und hardened strip steel (stainless)
- Tensile strength 500 – 1000 N/mm2 unhardened carbon steel
- Tensile strength 1000 – 2100 N/mm2 for hardened spring steel and stainless tape measure strips
- Tensile strength 500 – 2100 N/mm2 für stainless strips
Flatness
- < 0.02 mm / 10 mm width
Straightness
- < 0.8 mm / 1000 mm
- Extended tolerance: 0.3 mm / 1000 mm
Hardened steel
| No. | DIN | AISI |
|---|---|---|
| 1.1231 | Ck 67 | 1070 |
| 1.1248 | Ck 75 | 1075 |
| 1.1274 | Ck 101 | 1095 |
Stainless martensitic steel
| No. | DIN | AISI |
|---|---|---|
| 1.4021 | X 20 Cr 13 | 416 |
| 1.4028 | X 30 Cr 13 | 420 |
| 1.4034 | X 46 Cr 13 | 420 |
Austenitic stainless steel
| No. | DIN | AISI |
|---|---|---|
| 1.4310 | X 10 Cr Ni 18-8 | 301 |
| 1.4401 | X 5 Cr Ni Mo 17122 | 316 |
| 1.4301 | X 5 Cr Ni 18-10 | 304 |
| 1.4571 | X6 Cr Ni Mo Ti 17122 | |
| 1.4541 | X6 Cr Ni Ti 18-10 | 321 |
| 1.4404 | X2 Cr Ni Mo 17132 | 316 L |
| 1.4372 |
Single coils
- Inner diameter: 230 – 400 mm
- Outer diameter: 600 – 800 mm
Coil winding
- Inner diameter: 300 mm, 400 mm or 500 mm
- Maximum weight: 1000 kg
Bars / pieces
- Length: 2 – 2000 mm
Quality control
For smallest tolerances and maximum precision.
Cobra System Engineering
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