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Home > Standard > 40CrMnNiMo8-6-4 Standard standard

40CrMnNiMo8-6-4 Standard

40CrMnNiMo8-6-4 Standard standard Download, We provide the main countries around the ISO standard download, including: AISI(US),UNS(US),SAE(US),ASTM(US),AMS(US),ASME(US),MIL(US),FED(US),DIN(DEU),JIS(JPN),AFNOR(FR),B.S.(UK),SS(SWE),UNI(ITA).

Production specification

Round bar standard Download
Square-shape steel standard Download
Plate steel standard Download
Billet standard Download
Flat bar standard Download
wire standard Download
tube standard Download
pipe standard Download
Forging standard Download
casting standard Download
sheet standard Download
round bar standard Download
coil standard Download
Bar stock standard Download
profiled bar standard Download

 

 

 

 

 

1.2738 40CrMnNiMo8-6-4Chemical Composition :


C Si Mn P S Cr Mo Ni
Min. % 0.35 0.20 1.30 1.80 0.15 0.90
Max. % 0.45 0.40 1.60 0.030 0.030 2.10 0.25 1.20

 


 Material Code :

DIN ASTM JIS GOST
1.2738 P20+Ni - -
40CrMnNiMo8-6-4


Properties :

Plastic mould steel with excellent polishability properties, good wear resistance, contains 1 % Ni alloy in addition to 1.2311, because of the Ni addition there is no hardness decrease in the center of large sizes over 400 mm thickness, easy to machine, requiring no heat treatment, 280 - 325 HB hardened and tempered condition. Suitable for nitriding, welding, hard chrome plating, photo etching and flame hardening.


Applications :

Plastic injection moulds with high mirror surface requirements, large injection and compression moulds for plastic proc-essing over 400 mm thickness such as bumpers, insturment panels, garbage containers, dashboards, waste bins, chairs, bottle crates, television cabinets etc., mould carrier frames for the plastic moulds, components for general mechanical engineering and tool manufacture, synthetic plastic moulding dies, pressure casting frames, hydro forming tools, struc-tural components, shafts, blow moulds, extrusion dies for thermoplastics.


 

 

 

 

 

Physical Properties :

Density : at 20 °C 7,85 kg/dm 3
Thermal conductivity : at 20 °C 33,0 W/(m.K)

Thermal expansion between : 20°Cand..°C, 10 -6 m/(mK)
100 °C 200 °C 300 °C 400 °C 500 °C
12.8 13.0 13.8 14.0 14.2


Heat Treatment :

Annealing : 710 - 730 °C
Hardness after annealing : Max. 240 HB
Stress relieving : Approx. 600 °C
Hot forming : 1050 - 850 °C
Hardening : 870 - 890 °C
Quenching media : Oil, Salt bath, Vacuum
Hardness after quenching : 50 - 54 HRC
Hardness after tempering :
100 °C 200 °C 300 °C 400 °C
52 HRC 51 HRC 49 HRC 46 HRC

 


 

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