35CrMnSiA

Alloy Steel

35CrMnSiA

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

Chemical Composition (%)

C0.32
SI1.1
MN0.8
CR1.1
P0.025
S0.025

Mechanical Properties

Tensile:≥1620 MPa;Yield:≥1275 MPa;Elong:≥9%;RA:≥40%

Chinese Standard

T 3077 35CrMnSiA

Available Forms

Bar,Plate

Uses

Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Chromium (≈1.25%) improves hardenability, wear and corrosion resistance. 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).

Request a Quote Back to category

Comments 0