30MnV

Alloy Steel

30MnV

(GB/T 3077). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.27
MN0.7
V0.7
P0.035
S0.035

Mechanical Properties

Tensile:≥835 MPa;Yield:≥635 MPa;Elong:≥12%;RA:≥45%

Chinese Standard

T 3077 30MnV

Available Forms

Bar,Plate

Uses

Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Vanadium (≈0.9%) refines grain and strengthens the tempered structure. Applied to gears, shafts, bolts, connecting rods, pressure parts and heavy forgings in automotive, energy and machinery sectors.

Heat Treatment

Austenitize at 820–870 °C (oil or water quench depending on section) and temper at 400–650 °C to the required strength/toughness balance.

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).

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