SAE 4140 alloy die steel

 

Grade: AISI 4140/4142,DIN 41CrMo4/42CrMo4,JIS SCM4, W.Nr.1.7225

 

Main features: 
1.4140: Good purity and homogeneity.

2.4140: Good dimensional stability during heat treatment.

3.Excellent preparation for nitriding, induction hardening to increase the mechanical properties. 
 

Chemical composition of 4140:

C	Si	Mn	S	P	Cr	Mo
0.38~0.45	0.17~0.37	0.50~0.80	≤0.035	≤0.035	0.90~1.20	0.15~0.25

 

Specification :

Round bar	Diameter (mm)	Length (mm)
	50~500	2000~5800
plate/sheet	Thickness (mm)	Width (mm)	Length (mm)
	20~400	80~1000	2000~5800

 

Applications of 4140: 
1.Shafts, gears, cylinders and columns for industry mechanics in general. 
2.Construction of mold 
3.For compression molds, where the etching is not required. 
4.Mechanical parts in general.

 

Heat treatment: 

Normalization:   heating to 840 to 880 ° C, maintenance, furnace cooling to 600 ° C, then in air. 
Stress relieving:  after rough heat to 500 ° C, maintenance raff. In oven to 400 ° C, then in air.
Hardening:   preheating from 600 to 650 ° C austenitizing at 840 to 880 ° C, quenching in oil. 
Tempering:   heating to 550 - 650 ° C and maintenance regime, again depending on the mechanical properties 
to be obtained.

 

 

Company equipments:

smelting equipment :  3 and 4 tons induction furnaces;electric slag furnaces of 0.5t,1t,3t,5t,especially 3 and 5 tons electric slag 

furnaces which feature both unipolar and bipolarity series functions.etc.

Processing equipments :   electric hydraulic hammer; supporting equipments, gas producer, reheating furnace, gas annealing 

furnace, electric annealing saw, etc.

Detective equipments :   functions of chemical annalysis, physics property and mechnical property, etc.

 

 

 

    YL: 4140

 

 

 

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