Spring Steel qualities

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The list of spring steel qualities is quite extensive, as most major steel producing countries have their own national standards, and this website cannot list them all. Accordingly we will give details of the American, European, UK and German standards, which are recognised in most parts of the world.

Standard Spring Steel Grades Chemistry

Carbon Steels for Heat Treatment

Euronorm

Germany

UK

USA

 

 

 

 

 

 

 

 

EN 10132 - 4

DIN 17222

BS 1449

SAE

%C

%Mn

%Si

%S

%P

%Al

%Cr

Max Hardness  (annealed)

 

CK 50

CS50

SAE1050

.45-.55

.50-.90

.05-.35

.040 max

.045 max

-

-

 

C67S

CK67/C67

CS70

SAE 1070

.68 - .73

.60 - .85

.15 - .25

.01 max

.02 max

-

.20 - .30

200

C75S

CK75/C75

CS70

SAE 1074

.70 - .75

.60 - .80

.15 - .30

.025 max

.025 max

.02 - .05

.20 - .30

200

C85S

CK85

CS80

SAE 1084

.80 - .90

.40 - .70

.15 - .35

.025 max

.025 max

-

.40 max

210

C90S

 

 

 

.80-.90

0.40-0.70

.15-.35

0.25 max

0.25 max

 

.40 max

215

C100S

CK101

CS95

SAE 1095

0.90-1.00

.30-.60

.05-.35

.025 max

.025 max

-

.40 max

220
                       
       
Grade designation Chemical composition   Mechanical properties⁄
Name Number C Si Mn  P S Cr  Mo V Ni Delivery condition max. Rp0.2  Rm min. A80 HV
          max. max.    max.       N/mm2 N/mm2 %  
    0.52 0.15 0.60             Annealed (+A) or annealed and skin passed (+LC) 480 max. 600 17 max. 185
C55S 1.1204  -  -  - 0.025 0.025 0.40 0.10 - 0.40 Cold rolled (+CR) - max. 1070 - max. 300
    0.60 0.35 0.90     max.     max. Quenched and tempered (+QT) - 1100 - 1700 - 340 - 520
    0.57 0.15 0.60             Annealed (+A) or annealed and skin passed (+LC) 495 max. 620 17 max. 195
C60S 1.1211  -  -  - 0.025 0.025 0.40 0.10 - 0.40 Cold rolled (+CR) - max. 1100 - max. 305
    0.65 0.35 0.90     max.     max. Quenched and tempered (+QT) - 1150 - 1750 - 345 - 530
    0.65 0.15 0.60             Annealed (+A) or annealed and skin passed (+LC) 510 max. 640 16 max. 200
C67S 1.1231  -  -  - 0.025 0.025 0.40 0.10 - 0.40 Cold rolled (+CR) - max. 1140 - max. 315
    0.73 0.35 0.90     max.     max. Quenched and tempered (+QT) - 1200 - 1900 - 370 - 580
    0.70 0.15 0.60             Annealed (+A) or annealed and skin passed (+LC) 510 max. 640 15 max. 200
C75S 1.1248  -  -  - 0.025 0.025 0.40 0.10 - 0.40 Cold rolled (+CR) - max. 1170 - max. 320
    0.80 0.35 0.90     max.     max. Quenched and tempered (+QT) - 1200 - 1900 - 370 - 580
    0.80 0.15 0.40             Annealed (+A) or annealed and skin passed (+LC) 535 max. 670 15 max. 210
C85S 1.1269  -  -  - 0.025 0.025 0.40 0.10 - 0.40 Cold rolled (+CR) - max. 1190 - max. 325
    0.90 0.35 0.70     max.     max. Quenched and tempered (+QT) - 1200 - 2000 - 370 - 600
    0.85 0.15 0.40             Annealed (+A) or annealed and skin passed (+LC) 545 max.680 14 max. 215
C90S 1.1217  -  -   - 0.025 0.025 0.40 0.10 - 0.40 Cold rolled (+CR) - max.1200 - max. 325
    0.95 0.35 0.70     max.     max. Quenched and tempered (+QT) - 1200 - 2100 - 370 - 600
    0.95 0.15 0.30             Annealed (+A) or annealed and skin passed (+LC) 550 max. 690 13 max. 220
C100S 1.1274  -  -  - 0.025 0.025 0.40 0.10 - 0.40 Cold rolled (+CR) - max. 1200 - max. 325
    1.05 0.35 0.60     max.     max. Quenched and tempered (+QT) - 1200-2100 - 370 - 630
    1.20 0.15 0.30             Annealed (+A) or annealed and skin passed (+LC) 600 max. 740 11 max. 230
C125S 1.1224  -  -  - 0.025 0.025 0.40 0.10 - 0.40 Cold rolled (+CR) - max. 1200 - max. 325
    1.30 0.35 0.60     max.     max. Quenched and tempered (+QT) - 1200 - 2100 - 370 - 630
    0.45 1.60 0.50             Annealed (+A) or annealed and skin passed (+LC) 580 max. 720 13 max. 225
48Si7 1.5021  -  -  - 0.025 0.025 0.40 0.10 - 0.40 Cold rolled (+CR) - - - -
    0.52 2.00 0.80     max.     max. Quenched and tempered (+QT) - 1200 - 1700 - 370 - 520
    0.52 1.60 0.60             Annealed (+A) or annealed and skin passed (+LC) 600 max. 740 12 max. 230
55Si7 1.5026  -  -  - 0.025 0.025 0.40 0.10 - 0.40 Cold rolled (+CR) - - - -
    0.60 2.00 0.90     max.     max. Quenched and tempered (+QT) - 1200 - 1700 - 370 - 520
    0.47   0.70     0.90   0.10   Annealed (+A) or annealed and skin passed (+LC) 550 max. 700 13 max. 220
51CrV4 1.8159  - 0.40  - 0.025 0.025  - 0.10  - 0.40 Cold rolled (+CR) - - - -
    0.55
max
1.10     1.20   0.25 max. Quenched and tempered (+QT) - 1200 - 1800 - 370 - 550
    0.75 0.15 0.30     0.40   0.15   Annealed (+A) or annealed and skin passed (+LC) 580 max. 720 12 max. 225
80CrV2 1.2235  -  -  - 0.025 0.025  - 0.10  - 0.40 Cold rolled (+CR) - - - -
    0.85 0.35 0.50     0.60   0.25 max. Quenched and tempered (+QT) - 1200 - 1800 - 370 - 550
    0.72 0.15 0.30           1.80 Annealed (+A) or annealed and skin passed (+LC) 540 max. 680 13 max. 210
75Ni8 1.5634  -  -  - 0.025 0.025 0.15 0.10 -  - Cold rolled (+CR) - - - -
    0.78 0.35 0.50     max.     2.10 Quenched and tempered (+QT) - 1200 - 1800 - 370 - 550
    1.20 0.15 0.25     0.40       Annealed (+A) or annealed and skin passed (+LC) 590 max. 750 11 max. 235
125Cr2 1.2002  -  -  - 0.025 0.025  - 0.10 - 0.40 Cold rolled (+CR) - - - -
    1.30 0.35 0.40     0.60     max. Quenched and tempered (+QT) - 1300 - 2100 - 405 - 630
    0.95 0.15 0.20     1.35       Annealed (+A) or annealed and skin passed (+LC) 590 max. 750 11 max. 235
102Cr6 1.2067  -  -  - 0.025 0.025  - 0.10 - 0.40 Cold rolled (+CR) - - - -
    1.10 0.35 0.40     1.60     max. Quenched and tempered (+QT) - 1300 - 2100 - 405 - 630