75HMF

Technological properties. Weldability: hard -to- weld steel. Flock sensitivity: insensitive. Temperature of critical points: Ac 1 = 760 — 790. Hardness after normalization and tempering: HB 10 -1 = 241 — 285 MPa. Hardness after quenching and tempering HB 10 -1 = 352 — 429 MPa. Substitutes: 75XM, 9HF.

working and supporting rolls forged sheet mills for hot rolling of ferrous metals.

Classification

Country Section Category
CIS, Russia, Ukraine Tool steel Roll tool steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Ni, % V, % P, % C, % S, % Mo, %
OST 24.013.04 - 0 95.27–97.35 0.2–0.6 0.2–0.7 1.4–1.7 < 0.3 0.05–0.25 < 0.04 0.7–0.8 < 0.04 0.1–0.3

Information on suppliers

Technological Properties

Weldability Flake Susceptibility
Difficult to weld insensitive

Critical point temperatures

Ac1, K
760–790

Standards

Standard Description
OST 24.013.04 - 0

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Cr % Chrome
Ni % Nickel
V % Vanadium
P % Phosphorus
C % Carbon
S % Sulfur
Mo % Molybdenum

Designation of types of weldability

Parameter Units of measurement Description
no limits Welding is performed without heating and without subsequent heat treatment
Boundedly welded Welding is possible with heating up to 100–120 °C and subsequent heat treatment
Difficult to weld For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing
Not applicable for welded structures

Description of temperatures of critical points

Parameter Units of measurement Description
Ac1 K