SAE

steel

JIS SUP7 Steel: SAE 9255 Equivalent — Si-Mn Spring Steel for Heavy-Duty Leaf Springs

JIS SUP7 is a Si-Mn alloy spring steel (JIS G4801) nearest to SAE 9255. Explore chemical composition, mechanical properties, heat treatment, and how it compares to SUP6 and SUP12.
2026.05.30
steel
steel

JIS SUP3 Steel: SAE 1075 Equivalent — High-Carbon Spring Steel for Thin-Section Applications

JIS SUP3 is a high-carbon spring steel (JIS G4801) nearest to SAE 1075/1080. Learn composition, mechanical properties, heat treatment, and when to choose it over alloy spring grades.
2026.05.29
steel
steel

JIS SUP12 Steel: SAE 9262 Equivalent — Si-Cr Spring Steel for High-Fatigue Applications

JIS SUP12 is a Si-Cr alloy spring steel nearest to SAE 9262. Explore chemical composition, mechanical properties, heat treatment, and selection tips vs. SUP7.
2026.05.27
steel
steel

JIS SUP11A Steel: SAE 5160H Equivalent — Mn-Cr-B Spring Steel for Large-Section Springs

JIS SUP11A is a Mn-Cr-B alloy spring steel (JIS G4801) nearest to SAE 5160H. Learn composition, mechanical properties, heat treatment, and why boron makes it ideal for large cross-section springs.
2026.05.27
steel
steel

JIS SUP10 Steel: SAE 6150 Equivalent — Cr-V Spring Steel for Precision and Aerospace Springs

JIS SUP10 is a Cr-V alloy spring steel (JIS G4801) nearest to SAE 6150 and EN 51CrV4. Discover composition, mechanical properties, heat treatment, and when to choose it for high-performance springs.
2026.05.26
steel
steel

SUP9 Spring Steel: Equivalent Grades, Properties & Heat Treatment Guide

SUP9 (JIS G4801) Cr spring steel: equivalents (SAE 5160, DIN 55Cr3), chemical composition, mechanical properties, heat treatment, and coil spring applications.
2026.05.13
steel
steel

SUP6 Spring Steel: Equivalent Grades, Properties & Heat Treatment Guide

SUP6 (JIS G4801) Si-Mn spring steel: equivalents (SAE 9260, EN 60Si7), chemical composition, mechanical properties, heat treatment, and leaf spring applications.
2026.05.13
steel