Ck101 1.1274 Cold Rolled Steel Strip
DIN 17222 Ck101 1.1274 Cold Rolled Steel Strips for Springs
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.
Ck101 1.1274 Introduce
Ck101 1.1274 steel is one of the higher carbon steels used for high hardness in the fully hardened condition. Low-alloy carbon steel for thermal improvement by oil hardening available in strips and thin cold-rolled sheets used for springs and leaf springs with small cross-sections. It is characterized by low hardenability, abrasion resistance and decarburization and oxidation tendency during heat treatment.
Ck101 1.1274 Dimensions and permissible deviations
Thickness: 0.1 to 4mm; Tolerances: +/- 0.008 to 0.11 mm
Width: 10 to 600mm; Tolerances: +/- 0.15 to 0.60mm
Ck101 1.1274 Equivalent Grade
| Steel grade according to DIN 17 222 | Comparable grade according to EURONORM 132 | |
| Code number | Material number | |
| Ck101 | 1.1274 | CS 100 |
Ck101 1.1274 Chemical composition
| Steel number | grade number | C | Si | Mn | P | S |
| Ck101 | 1.1274 | 0,95 to 1,05 | 0,15 to 0,35 | 0,40 to 0,60 | 0,035 | 0.035 |
Ck101 1.1274 Treatment condition on delivery
Cold rolled + soft annealed : G
Cold rolled + hardened + tempered : H + A
Ck101 1.1274 Mechanical properties in the cold rolled + soft annealed condition G
| Steel number | grade number | Tensile strength N/mm2 maximum | Elongation at break (L = 80 mm) % minimum | Vickers hardness maximum |
| Ck101 | 1.1274 | 690 | 11 | 205 |
Ck101 1.1274 Tensile strength in the cold rolled + hardened + tempered condition (H + A)
| Steel number | grade number | Tensile strength N/mm2 |
| Ck101 | 1.1274 | 1500 to 2100 |
Ck101 1.1274 Vickers hardness in the cold rolled + hardened + tempered condition (H + A)
| Steel number | grade number | Vickers hardness |
| Ck101 | 1.1274 | 445 to 620 |
Ck101 1.1274 Surface condition
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.
Ck101 1.1274 Types of heat treatment
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 |
| Ck101 | 1.1274 | 650 to 690 | 790 to 820 | 300 to 500 | 750 |
Ck101 1.1274 Acceptance testing and test certificates
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
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