20MnNiMo steel plate fixed rolling, 20MnNiMo steel plate help C919, electroslag steel plate 20MnNiMo

20MnNiMo steel plate fixed rolling, 20MnNiMo steel plate help C919, electroslag steel plate 20MnNiMo

20MnNiMo steel plate fixed rolling, 20MnNiMo steel plate help C919, electroslag steel plate 20MnNiMo introduction

Large-thickness quenched and tempered electroslag steel 20MnNiMo is the leading material for the manufacture of nuclear power primary circuit equipment, which has excellent comprehensive mechanical properties in the quenched and tempered state, and is used to make 80,000 tons of die forging press for manufacturing large aircraft. 20MnNiMo is widely used in the manufacture of key components in large nuclear power pressure vessels and other fields.

20MnNiMo steel plate fixed rolling: Wugang to the sun

20MnNiMo Steel Plate Chemical Composition

C Si Mn P S Ni Cr Mo Cu V

0.17~0.23 0.15~0.4 1.2~1.5 ≤0.025 ≤0.025 0.4~1 ≤0.5 0.45~0.6 ≤0.1 ≤0.05

Mechanical properties of 20MnNiMo steel plate

Variety, Delivery Status, Specification, Details

20MnNiMo Quenched and Tempered ≤300 Rp0.2(MPa) ≥345 Description

Rm(MPa) 550~725 Description

A5(%) ≥18 Description

Z(%) ≥38 Description

Impact Temperature 20 Description

Akv(J) 41 Description

HB 168~229 description

The 2438-ton large-thickness electroslag steel plate 20MnNiMo developed by Wugang Company of HBIS Group provides strong steel support for the domestic large aircraft project, and is used in the world's largest 80,000-ton die forging press for the national treasure equipment of C919 large aircraft forgings and fills the domestic gap.

20MnNiMo steel plate surface quality requirements

The surface quality requirements of steel plates are very strict. The steel plate is delivered in the quenching + tempering state, with many processes, and the steel plate after heat treatment: the research and development of 20MnNiMo steel plate with large thickness is more iron oxide scale, which has a great impact on the surface quality. In addition, the user requires the unevenness of the whole plate to be ≤8mm, which is very difficult to produce for a steel plate with a thickness of 390mm.