07MnNiMoDR — alloy Steel: Composition, Properties & Applications

Also known as: 07MnNiMoDR
Chinese GB low-temperature QT steel plate.

CHEMICAL COMPOSITION
C:≤0.09;Si:0.15-0.45;Mn:1.20-1.60;Ni:0.30-0.70;Mo:0.15-0.40;P:≤0.018;S:≤0.005

TYPICAL APPLICATIONS
High-end / niche grade used in aerospace, defense, tooling, bearing, gear or heavy shaft applications.

AVAILABLE FORMS
Bar, plate, sheet, tube, forgings, strip, wire, powder

HEAT TREATMENT
Typically normalized (880–920 °C, air cool) or carburized (900–930 °C) for case-hardening grades, then quenched and tempered at 150–200 °C. Carburize 900–930 °C, direct/intake quench, temper 150–200 °C; useful case depth 0.5–1.5 mm.

PROCESSING PRECAUTIONS
Weldable with standard procedures; preheat may be needed for thick sections or higher-carbon/ alloy grades. Protect from decarburization during heating (controlled atmosphere or protective coating). Machine the core stock before surface hardening; leave grinding allowance for the hardened case.

SOURCE & SUPPLY
Shanxi Youte Steel stocks 07MnNiMoDR in bars, plates, pipes and forgings with mill test certificates, cut-to-length service and export packaging. Contact our team for quotations and technical data sheets.