00Cr12 — alloy Steel: Composition, Properties & Applications

Also known as: 00Cr12
(GB/T 20878). Nominal values—confirm mill certificate.

CHEMICAL COMPOSITION
C:0.30-0.45;Mn:0.60-1.00;Si:0.15-0.35;Cr:0.50-1.00;P:≤0.035;S:≤0.040

MECHANICAL PROPERTIES
Tensile:≥585 MPa;Yield:≥350 MPa;Elong:≥18%

TYPICAL APPLICATIONS
Low-alloy engineering steel with enhanced hardenability and strength from alloying elements. Chromium (≈0.75%) improves hardenability, wear and corrosion resistance. Applied to gears, shafts, bolts, connecting rods, pressure parts and heavy forgings in automotive, energy and machinery sectors.

AVAILABLE FORMS
Bar,Plate

STANDARDS & EQUIVALENT GRADES
T 20878 00Cr12

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.

PROCESSING 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).

SOURCE & SUPPLY
Shanxi Youte Steel stocks 00Cr12 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.