spring steel
spring steel
spring steel
spring steel
spring steel
spring steel
spring steel
spring steel

spring steel

Spring steel refers to special steel grades for manufacturing various springs and other elastic components. Springs mainly include leaf springs, coil springs and other elastic elements. The main function is to absorb impact energy and ease mechanical vibration and impact.

Spring steel is divided into non-alloy spring steel (ie carbon spring steel) and alloy spring steel. Alloy spring steel: generally contains 0.45%~0.70% carbon and a certain amount of alloying elements such as Si, Mn, Cr, V, W and B. The addition of alloying elements improves the anti-relaxation properties of the spring steel and improves the toughness of the steel. Carbon spring steel: The steel contains 0.60%~0.90% carbon and 0.3%~1.20% manganese, no other alloying elements are added, and the cost is low.

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Steel Grade GB ISO AISI JIS DIN NF
20Cr GB20Cr 20Cr4 5120 SCr22,SCrl20 20Cr4 -
30Cr GB34Cr4 34Cr4 5130 SCr2,SCr430 34Cr4 34Cr4
35Cr GB35Cr 34Cr4 5132 SCr3,SCr435 34Cr4 34Cr4
40Cr GB40Cr 37Cr4 5140 SCr4,SCr440 41Cr4 41Cr4
45Cr GB45Cr 41Cr4 5145 SCr5,SCr445 41Cr4 41Cr4
50Cr GB50Cr - 5150 SCr445 - -
20CrMo - 18CrMo4 - SCM22.SCM430 - 25CrMo4
30CrMo GB30CrMo 25CrMo4 4130 SCM2,SCM430 25CrMo4 25CrMo4
30CrMoA GB30CrMoA 34CrMo4 4130 SCM430 34CrMo4 34CrMo4
35CrMo GB35CrMo 34CrMo4 4137 SCM3,SCM435 34CrMo4 34CrMo4
42CrMo GB42CrMo 42CrMo4 4140 SCM440 42CrMo4 42CrMo4
Steel Grade Chemical Composition (%)
C Mn  Si  S P Cr Cu Ni
# 45 0.42-0.50 0.50-0.80 0.17-0.37 ≤0.035 ≤0.035 ≤0.25 ≤0.25 ≤0.30
# 50 0.47-0.55 0.50-0.80 0.17-0.37 ≤0.035 ≤0.035 ≤0.25 ≤0.25 ≤0.30
# 55 0.52-0.60 0.50-0.80 0.17-0.37 ≤0.035 ≤0.035 ≤0.25 ≤0.25 ≤0.30
# 60 0.57-0.65 0.50-0.80 0.17-0.37 ≤0.035 ≤0.035 ≤0.25 ≤0.25 ≤0.30
# 70 0.67-0.75 0.50-0.80 0.17-0.37 ≤0.035 ≤0.035 ≤0.25 ≤0.25 ≤0.30
65Mn 0.62-0.70 0.90-1.20 0.17-0.37 ≤0.035 ≤0.035 ≤0.25 - -
55Si2Mn 0.52-0.60 0.60-0.90 1.50-2.00 ≤0.035 ≤0.035 ≤0.35 - -
60Si2Mn 0.56-0.64 0.60-0.90 1.50-2.00 ≤0.035 ≤0.035 ≤0.35 - -
60Si2MnA 0.56-0.64 0.60-0.90 1.60-2.00 ≤0.03 ≤0.03 ≤0.35 - -
55CrMnA 0.52-0.60 0.65-0.95 0.17-0.37 ≤0.03 ≤0.03 0.65-0.95 - -
60CrMnA 0.56-0.64 0.70-1.00 0.17-0.37 ≤0.03 ≤0.03 0.70-1.00 - -
50CrVA 0.46-0.54 0.50-0.80 0.17-0.37 ≤0.03 ≤0.03 0.80-1.10 - -
60CrMnBA 0.56-0.64 0.70-1.00 0.17-0.37 ≤0.03 ≤0.03 0.70-1.00 - -

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