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Product Details:
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| Grade: | Ck75 1.1248 | Feature: | Cold Rolled |
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| Shape: | Steel Strip | Delivery Condition 2: | Cold Rolled + Soft Annealed : G |
| Steel Number: | 1.1248 | Steel Grade: | Ck75 |
| Surface Condition: | Bright, Grey-blue, Polished, Polished And Colour-tempered | Form: | Steel Coils Strips |
| Standard: | DIN 17222 | ||
| High Light: | 1.1248 Cold Rolled Steel Strips,Ck75 Cold Rolled Steel Strips,DIN 17222 Cold Rolled Steel Coils |
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Cold rolled steel strip for springs is distinguished by high dimensional accuracy and good surface quality and, in the cold rolled + hardened + tempered condition (H + A) offers the possibility of achieving high values of hardness, tensile strength and elastic limit.
Ck75 1.1248 steel is one of the higher carbon steels used for high hardness in the fully hardened condition. In such condition the steel is more brittle than the lower carbon steels. Applications include springs.
Thickness: 0.1 to 4mm; Tolerances: +/- 0.008 to 0.11 mm
Width: 10 to 600mm; Tolerances: +/- 0.15 to 0.60mm
| Steel grade according to DIN 17 222 | Comparable grade according to EURONORM 132 | |
| Code number | Material number | |
| Ck75 | 1.1248 | 1 CS75 |
| Steel number | grade number | C | Si | Mn | P | S |
| Ck75 | 1.1248 | 0,70 to 0,80 | 0,15 to D,35 | 0,60 to 0,80 | 0,045 | 0,045 |
Cold rolled + soft annealed : G
Cold rolled + hardened + tempered : H + A
| Steel number | grade number | Tensile strength N/mm2 maximum | Elongation at break (L = 80 mm) % minimum | Vickers hardness maximum |
| Ck75 | 1.1248 | 640 | 12 | 190 |
| Steel number | grade number | Tensile strength N/mm2 |
| Ck75 | 1.1248 | 1320 to 1870 |
| Steel number | grade number | Vickers hardness |
| Ck75 | 1.1248 | 390 to 555 |
Strip to be supplied in the
1 cold rolled + soft annealed G or
2 cold rolled + soft annealed + cold rolled (G + K) condition
must have a bright, metallically clean surface.
Cold rolled + hardened + tempered (H + A) strip is supplied, as agreed at the time of ordering, with
1 grey-blue (GR),
2 bright (8K),
3 polished (P) or
4 polished and colour-tempered (P & AF) surface.
Approximate values for heat treatment and minimum hardness values in the hardened condition of cold rolled steel strips for springs
| Steel number | grade number | Annealed °C | Hardened in oil at °C | Tempered to °C | Vickers hardness in hardened condition minimum |
| Ck75 | 1.1248 | 650 to 690 | 810 to 840 | 300 to 500 | 700 |
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
Contact Person: Ms. Florence Tang
Fax: 86-731-89853933
