Material 1.1231

Spring steel

C67S as cold rolled steel strips for springs with high dimensional accuracy and surface finish

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1.1231

Standards

HDIN / EN US-Standard AFNOR UNI JIS request
C67S Ck67 AISI 1070 UNS G10700 C67 S70C-CSP S70CM request

Material Category: Spring steel

Applications

disc springs
spring plates

Heat Treatment

Austenitizing 815 - 845 C°, cooling oil
at least 59 HRC or 670 HV quenching hardness

Chemical Composition

C % Si % Mn % P % S % Cr % Mo % Ni %
0,65 - 0,73 0,15 - 0,35 0,60 - 0,90 max 0,025 max 0,025 max 0,40 max 0,10 max 0,40

 

Product Specifications

DIN EN 10132-4

Mechanical Properties

weichgeglüht  0,2% Dehngrenze (Rp0,2) Zugfestigkeit (Rm) Bruchdehnung (A 80 mm) Härte (HV) Härte (HRB)
0,3 - 3,0 mm <= 510 N/mm² <= 640 N/mm² >= 16 %  <= 200 HV <= 92 HRB
gehärtet Härte (HV) Härte (HRC)
0,3 - 3,0 mm >=670 HV >= 59 HRC
vergütet  Zugfestigkeit (Re) Härte (HV) Härte (HRC)
0,3 - 3,0 mm 1200 - 1.900 N/mm²    
0,3 - 0,5 mm   485 - 535 HV  
0,5 - 0,75 mm   465 - 515 HV  
0,75 - 1,0 mm   455 - 505 HV  
1,0 - 1,5 mm   445 - 495 HV  
1,5 - 2,0 mm   425 - 475 HV  
0,3 - 3,0 mm   370 - 580 HV  
2,0 - 3,0 mm   415 - 465 HV  
      38,5 - 54 HRC
kaltgewalzt  Zugfestigkeit (Rm) Härte (HV)
0,3 - 3,0 mm <= 1140 N/mm² <= 315 HV

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