58CrV4

Alloy Steel

58CrV4

Cr-V spring steel. (DIN 17221; equiv GB 50CrVA / DIN 51CrV4 / JIS SUP10). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.48
SI0.15
MN0.7
CR0.8
V0.1

Mechanical Properties

Tensile:≥1274 MPa;Yield:≥1127 MPa

Chinese Standard

DIN 17221 58CrV4

Equivalent Grades

GB 50CrVA / DIN 51CrV4 / JIS SUP10

Applications

铬钒弹簧钢。,"Bar

Available Forms

Strip"

Uses

Spring steel with high elastic limit and fatigue strength for coils, leaf springs, clips and suspension parts. Silicon (≈0.25%) raises elastic limit and tempering resistance. Supplied as strip, wire and bar; shot-peened after forming for longer service life.

Heat Treatment

Austenitize 830–880 °C (oil quench) and temper at 400–520 °C; stress-relieve formed springs at 230–320 °C after coiling.

Precautions

Preheat and control interpass temperature when welding; post-weld heat treatment or stress relief is recommended to avoid hard-zone cracking. Use low-hydrogen electrodes. Protect from decarburization during heating (controlled atmosphere or protective coating). Shot-peen after coiling to improve fatigue life; avoid sharp bends and surface defects.

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