DQ60

Alloy Steel

DQ60

Specialty steel grade. ; equiv DQ60 / 4145H mod). Nominal values—confirm mill certificate.

Chemical Composition (%)

C0.38
SI0.15
MN0.75
CR0.8
MO0.15

Mechanical Properties

Tensile:≥1080 MPa;Yield:≥930 MPa;Elong:≥12%

Chinese Standard

DQ 60 DQ60

Equivalent Standards

DQ60

Applications

通用铬钼调质钢。,Bar

Available Forms

Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Chromium (≈0.95%) improves hardenability, wear and corrosion resistance. Molybdenum (≈0.2%) raises high-temperature strength and prevents temper embrittlement. Applied to gears, shafts, bolts, connecting rods, pressure parts and heavy forgings in automotive, energy and machinery sectors.

Uses

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

Heat Treatment

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).

Precautions

4145H mod

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