HOT WORK TOOL STEEL

NORM: ISO 4957

APPLICATION:

Steel susceptible for moulds for die-casting of light metals, loaded parts of presses, highly loaded dies for presses, upsetting punches, die inserts and tools for fusible alloy extrusion. Tools for the manufacturing of sleeves, for the manufacturing of screws, nuts, rivets and pins

CHEMICAL COMPOSITION:

CSiMnPSCrMoWVCoNi
0,33-0,410,80-1,200,25-0,50Max 0,030Max 0,0304,80-5,501,10-1,50-0,30-0,50--

MECHANICAL PROPERTIES:

Hardness after Tempering ºC Symbol Value
Soft annealing HB ≤229
Quenching with 1020 ºC in oil HRC 54
Quenching with 1020 ºC in oil and tempering

(cooling during quenching can be performed gradually in the salt bath at around 550 ºC and then cooled in the air)

550 HRC ≥48
350 HRC 53.5
400 HRC 54.5
450 HRC 55.5
500 HRC 56
550 HRC 52.5
600 HRC 46
650 HRC 39

PHYSICAL PROPERTIES:

Property Unit Value
Density, ρ g*cm-3 7.79
Thermal expansion, α20-100ºC) K-1 10.7*10-6
Thermal conductivity, λ20ºC) W*m-1*K-1 38

Technological treatment processes:

Technological treatment processes Possible application Temperature, °C
Hot forming Forging + 1100-850
Rolling + 1100-850
Treatment Heat treatment Quenching + 980-1030
Tempering + 450-550
Precipitation strengthening Supersaturation
Ageing
Annealing Softening + 780-820
Stress relieving + 600-650
Thermochemical treatment Nitriding + 470-540
Other

INTERNATIONAL STEEL GRADES:

ISO EN Russia
X37CrMoV5-1 ISO 4957:2004 X37CrMoV5-1 ISO 4957:2004 4H5MFS GOST 5950-73
US Japan China
H11 ASTM A 681-91 SKD 6 JIS G 4404-1983 4Cr5MoSiV GB 1299-85