HV4F

Temperature T critical points steel HV4 °F: Ac1 = 750 — 760. It is not applicable for steel weldments malosklonna to temper brittleness: Hardness after annealing HB 10 -1 = 255 MPa.

cutters and milling in the processing at a low speed cutting of hard metals (rolls with hardened surface), engraving cutters with very hard work, piercing punches, and so on. d.

Classification

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

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % V, % P, % C, % S, % Mo, % W, %
GOST 5950-73 91.29–94.4 0.15–0.35 0.15–0.4 0.4–0.7 < 0.3 < 0.35 0.15–0.3 < 0.03 1.25–1.45 < 0.03 < 0.5 3.5–4.3

Information on suppliers

Technological Properties

Weldability Propensity to temper brittleness
Not applicable for welded structures loathsome

Critical point temperatures

Ac1, K
750–760

Analogues

USA Germany Japan Czech Republic Austria
F2 1.2453 (X130W5) SKS11 19714 K400

Standards

Standard Description
GOST 5950-73

Description of chemical elements

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

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