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Spring Steels

12 Materials

High-fatigue alloy steels per EN 10089 (51CrV4, 60SiCr7)

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38Si7
Spring Steel
Silicon spring steel with good toughness. For general spring applications and flat springs not requiring elevated temper…
Tensile
750–950 MPa
Hardness
223–280 HB
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46Cr2 (Simple Chromium Spring)
Spring Steel
46Cr2 -- basic Cr spring steel for moderate applications. Rm 900-1150 MPa Q+T. Economical spring steel for agricultural …
Tensile
— MPa
Hardness
— HB
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54SiCr6 (Standard Automotive Valve Spring Steel)
Spring Steel
54SiCr6 -- the most widely specified European automotive valve spring steel. Combines Si and Cr for balanced hardenabili…
Tensile
1,500–1,700 MPa
Hardness
— HB
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55Cr3 (Chromium Spring Steel)
Spring Steel
55Cr3 -- basic Cr spring steel. Rm 1200-1600 MPa Q+T, better hardenability than 55Si7. For medium-duty coil springs, tor…
Tensile
— MPa
Hardness
— HB
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55Si7 (Silicon Spring Steel)
Spring Steel
55Si7 -- standard Si spring steel. Rm 1200-1600 MPa in service. The classic flat spring steel for automotive leaf spring…
Tensile
— MPa
Hardness
— HB
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60CrMo3-3 (Cr-Mo Valve Spring Steel)
Spring Steel
60CrMo3-3 -- Cr-Mo valve spring steel. High fatigue resistance to 250 C service. For engine valve springs requiring elev…
Tensile
— MPa
Hardness
— HB
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60SiCr7
Spring Steel
Silicon-chromium spring steel — superior to 51CrV4 at elevated temperatures. Standard for automotive valve springs and s…
Tensile
900–1,100 MPa
Hardness
260–320 HB
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60SiCrA (Silicon-Chromium Spring)
Si-Cr Spring Steel
60SiCrA — Si-Cr spring steel for high-temperature service to 250 C. For diesel engine valve springs, turbocharger spring…
Tensile
— MPa
Hardness
— HB
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65Mn (Manganese Spring Steel)
Carbon-Manganese Spring Steel
65Mn — low-cost Mn spring steel. Good elasticity and fatigue resistance for cold-formed springs. Standard for flat sprin…
Tensile
— MPa
Hardness
— HB
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67SiCr5 (High Si-Cr Spring Steel)
Spring Steel
67SiCr5 -- combined Si-Cr spring steel for the highest-strength spring applications. Rm 1600-2000 MPa. For heavily loade…
Tensile
— MPa
Hardness
— HB
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X10CrNiMoV12-2-2 PH Stainless Spring (Bellows Grade)
Stainless Spring Steel
Bellows-grade 17-7PH-family stainless spring steel, optimised for thin-gauge diaphragm and metallic bellows manufacture.…
Tensile
900–1,050 MPa
Hardness
— HB
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X12CrNiCoMoWV12-10-3 (Ultra-High-Temp Turbine Spring)
Heat-Resistant Spring Steel
X12CrNiCoMoWV12-10-3 -- martensitic precipitation-hardened turbine-grade spring/fastener steel. Rm 1350 MPa retained to …
Tensile
1,300–1,450 MPa
Hardness
— HB
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