Designation of spring and spring steel in the Din system

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Composition of spring and spring steels, DIN 17224

This standard includes a group of steels, designed for the production of springs, which have increased elasticity values (see table).

MATERIAL DESIGNATION DIN Grade Designation CHEMICAL COMPOSITION
DIN standard C Si Mn P S Cr B Mo Nickel
Stainless steel C60 1,0601 17222 0,57 - 0,65 0,15-0,35 0,60-0,90 ≤ 0,045 ≤ 0,045
CS70 BS 1449 0,65-0,75 0,05-0,35 0,50-0,90 ≤ 0,030 ≤ 0,030
C75 1,0605 17222 0,70-0,80 0,15-0,35 0,60-0,90 ≤ 0,045 ≤ 0,045
Refined steel Ck67 1,1231 17222 0,65-0,72 0,15-0,35 0,60-0,90 ≤ 0,035 ≤ 0,035
Ck75 1,1248 17222 0,70-0,80 0,15-0,35 0,60-0,80 ≤ 0,035 ≤ 0,035
Ck85 1,1269 17222 0,80-0,90 0,15-0,35 0,45-0,65 ≤ 0,035 ≤ 0,035
50CrV4 1,8159 17222 0,47-0,55 0,15-0,40 0,70-1,10 ≤ 0,035 ≤ 0,035 0,90-1,20 0,10-1,20
17221 0,47-0,55 0,15-0,40 0,70-1,10 ≤ 0,030 ≤ 0,030 0,90-1,20 0,10-0,20
Corrosion-resistant steel X 12 CrNi 17 7 1,4310 17224 ≤ 0,12 ≤ 1,5 ≤ 2.0 ≤ 0,045 ≤ 0,030 16,0 - 18,0 Max 0.8 6.0 - 9.0
X 7 CrNiAl 17 7 1,4568 17224 ≤ 0,09 ≤ 1,0 ≤ 1,0 ≤ 0,045 ≤ 0,030 16,0 - 18,0 6,5-7,75
X 5 CrNiMo 17 12 2 1,4401 17224 ≤ 0,07 ≤ 1,0 ≤ 2.0 ≤ 0,045 ≤ 0,030 16,5 - 18,5 2,0 - 2,5 10,5 - 13,5
FV520B BS S145 0,048 0,37 1,05 ≤ 0,020 ≤ 0.014 16 - 18 1,72 5,47
Heat-resistant steel 21 CrMoV 5 7 1,7709 17240 0,17-0,25 0,15-0,35 0,35-0,85 ≤ 0,030 ≤ 0,035 1,20-1,50 0,25-0,35 0,65-0,80
X 22 CrMoV 12 1 1,4923 17240 0,18-0,24 0,10 - 0,50 0,30-0,80 ≤ 0,035 ≤ 0,035 11,0 - 12,5 0,25-0,35 0,80-1,20 0,30-0,80
X 35 CrMo 17 1,4122 SEW 400 0,33-0,43 Max 1.0 Max 1.0 Not more than 0.045 ≤ 0,030 15,5 - 17,5 0,9 - 1,3 Max 1.0
X 30 WCrV 5 3 1,2567 0,25-0,35 0,15-0,30 0,20-0,40 ≤ 0,035 ≤ 0,035 2,20-2,50 0,50 - 0,70 W: 4,0 - 4,5
A286 1,4980 AISI 660B ≤ 0,08 1,0 2,0 13,5 - 16 0,1 - 0,5 1 - 1,75 24 - 27

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Mechanical characteristics of steels

The main physical characteristics of the steels and their recommended applications are given in the table:

Type of steel Type of steel Designation DIN standard Operating temperature range Modulus of elasticity, MPa Fields of use
Stainless steel C60 1,0601 17222 -20 / +100 206000 General purpose
CS70 BS 1449 -20 / +100 206000
C75 1,0605 17222 -20 / +100 206000
Refined steel Ck67 1,1231 17222 -20 / +100 206000
Ck75 1,1248 17222 -20 / +100 206000 General purpose
Ck85 1,1269 17222 -20 / +100 206000
50CrV4 1,8159 17222 -50 / +200 206000
Corrosion-resistant steels X 12 CrNi 17 7 1,4310 17224 -200 / +200 190000 In the petrochemical and gas industry
X 7 CrNiAl 1,4568 17224 -200 / +300 195000 For food processing equipment
X 5 CrNiMo 17 12 2 1,4401 17224 -200 / +200 185000
FV520B BS S145 -90 / +300 210000
Heat-resistant steel X 22 CrMoV 12 1 1,4923 17240 -50 / +500 209000 In boilers and heat exchangers
X 35 CrMo 17 1,4122 SEW 400 -50 / +400 209000 For vehicles
X 30 WCrV 5 3 1,2567 -50 / +450 206000 For springs working in corrosive environments

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