C90S, 1.1217, 95Cr1, 1.2018 - Low-alloy spring steel with high carbon content for heat treatment - oil hardening according to EN 10132-4 and EN 10270-1.
| Standards | Steel Grades | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | ||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Mo: | Ni: | Al: | Cu: | |
| EN / DIN | C90S - 1.1217 - C 90 S | |||||||||
| 0.85 - 0.95 | 0.40 - 0.70 | 0.15 - 0.35 | <0.025 | <0.025 | <0.40 | <0.10 | <0.40 | - | - | |
| AFNOR | C90RR - XC 90 - XC90 | |||||||||
| 0.85 - 0.95 | 0.40 - 0.70 | 0.15 - 0.30 | <0.025 | <0.020 | <0.30 | <0.10 | <0.40 | <0.030 | - | |
| BS | CS95 | |||||||||
| 0.90 - 1.00 | 0.30 - 0.60 | 0.05 - 0.35 | <0.04 | <0.04 | - | - | - | - | - | |
| AFNOR | C90E2U | |||||||||
| 0.85 - 0.94 | 0.10 - 0.40 | 0.10 - 0.30 | <0.02 | <0.02 | - | - | - | - | - | |
| BS | 95CS - 95 CS - 95HS - 95 HS | |||||||||
| 0.90 - 1.00 | 0.30 - 0.60 | 0.05 - 0.35 | <0.04 | <0.04 | - | - | - | - | - | |
| DIN | 95Cr1 - 95 Cr 1 - 1.2018 | |||||||||
| 0.90 - 1.00 | 0.20 - 0.40 | 0.15 - 0.30 | <0.025 | <0.025 | 0.30 - 0.40 | - | - | - | - | |
| UNI | C90 - C 90 | |||||||||
| 0.85 - 0.95 | 0.40 - 0.60 | 0.15 - 0.40 | <0.035 | <0.035 | - | - | - | - | - | |
| JIS | SK95 - SK 95 - SK4 - SK 4 | |||||||||
| 0.90 - 1.00 | 0.10 - 0.50 | 0.10 - 0.35 | <0.03 | <0.03 | <0.30 | - | <0.25 | - | <0.25 | |
| JUS | PZ90 | |||||||||
| 0.90 - 0.99 | 0.30 - 0.70 | 0.10 - 0.30 | <0.04 | <0.04 | <0.15 | - | <0.015 | - | <0.025 | |
C90S (1.1217) steel - specification and application
Spring construction steel for oil hardening for springs and working periodically springs with small dimensions. Provided in the form of a spring tapes - C90S is characterized by high abrasion resistance and high strength.
In addition to the use for springs, it is also designed for wood and stone saws, knives and machine scissors, spring washers, cutting elements and cutting tools. After the treatment shows the structure of tempered martensite. During heat treatment, a protective atmosphere should be used to avoid decarburization and oxidation of the material.
C90S steel has a higher carbon content than C67S, C55S and C75S.
Mechanical properties of C90S (1.1217) steel
| Mechanical properties | ||||
|---|---|---|---|---|
| Soft state after smoothing rolling C90S +A+LC | ||||
| Tensile Strenght | Rm | < 680 MPa | ||
| Yield point | Re | < 545 MPa | ||
| Elongation | A | > 14% | ||
| Hardness | HV | HRB | < 215 HV | < 94 HRB |
| Cold-rolled condition C90S +CR | ||||
| Tensile strenght | Rm | < 1200 MPa | ||
| Hardness | HV | < 325 HV | ||
| Heat-treated state C90S +QT | ||||
| Tensile strenght | Rm | 1200 - 2100 MPa | ||
| Hardness | HV | HRC | 370 - 600 HV | 38.5 - 55.0 HRC |
In the C90S, 1.1217 grade Rolex Metal provides:
Other grades of spring steel:
1.1217 - C 90 S, C90RR, XC 90, XC90, CS95, C90E2U, 95CS, 95 CS, 95HS, 95 HS, C90, C 90, SK95, SK 95, SK4, SK 4, PZ90, 95Cr1, 95 Cr 1, 1.2018