Steel 4KH4VMFS (ДИ22)

Designation

Name The value
Designation GOST Cyrillic 4Х4ВМФС
Designation GOST Latin 4X4BMFC
Transliteration 4H4VMFS
By chemical elements 4Cr4WMoVС
Name The value
Designation GOST Cyrillic ДИ22
Designation GOST Latin DI22
Transliteration DI22
By chemical elements CuИ22

Description

4KH4VMFS steel is used: for the manufacture of tools of high-speed punching machine, landing on horizontal forging machines; inserts of dies for hot deformation of alloy structural steel and heat-resistant alloys hammers and crank presses (instead of less heat-resistant steel grades 4KH5V2FS, 4KH5MF1S, 4KH3VMF); molds of pressure casting of copper alloys.

Standards

Name Code Standards
Sheets and strips В33 GOST 4405-75, TU 14-131-971-2001
Bars and shapes В32 GOST 5950-2000, GOST 14955-77

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo W
GOST 5950-2000 0.37-0.44 ≤0.03 ≤0.03 0.2-0.5 3.2-4 0.6-1 ≤0.6 Rest ≤0.3 0.6-0.9 ≤0.03 1.2-1.5 0.8-1.2
Fe is the basis.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa KCU, kJ/m2
Rolled steel. Quenching in oil with 1050-1070 °C + Vacation at 620-630 °C (aging for 1 hour) + Holiday at 560-580 °C (aging 1 HR)
≥1470 ≥1668 ≥440

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
KCU Toughness