L6|1.2714|SKT4

Category

Hot Work Tool Steel
Delivery condition

Hot rolled & Hot forged, Soft annealed to max.220HB
Supply form

Round bar, Flat bar,Square bar,Plate

Introduction:

L6 steel is widely used in fields such as tool manufacturing.1ts main alloying elements include chromium (Cn), nicke(Ni), molybdenum (Mo),etc. and the addition of these alloying elements endows L6 steel with unique properties.L6 tool steel equivalent material includes European EN, 1S0,German DIN 1.2714/55NiCrMoV7, Japanese JIS standard SKT4, Chinese GB 5CrNiMo,Rusia GOST 5XHM,etc

Chemical composition:

Corresponding international common brands				Hardness	Chemical Composition (%)
CHINA	US	JAPAN	GERMNAY	Hardness	C	Si	Mn	P	S	Cr	Ni	Mo	V
5CrNiMo	L6	SKTT4	1.2714	-	0.5-0.6	0.1-0.4	0.6-0.9	≤0.03	≤0.03	0.8-1.2	0.8-1.2	0.35-0.55	0.05-0.15

Characteristics:

Hot work steel that can be used for a wide range of applications.
With good through hardenability, tempering resistance, toughness, pressure and heat resistance.

Applications:

Forging and swaging with very large dimensions, hot forming tools, hot shear blades, extrusion tools, punches,tools for forging machines,tool holders, die holders.

Mechanical Properties

Tensile Strength	Yield Strength	Elongation	Impact Toughness	Hardness	Compressive Strength	Modulus of elasticity
1000-1400 MPa	1045 MPa	15%-20%	20 J/cm2-25 J/cm2	50-55 HRC	2500MPa	205 GPa

Physical Properties

The exact values of these physical characteristics depend on the composition, heat treatment, and manufacturing procedures used to create L6 steel, so take them with a grain of salt. For detailed details on the physical characteristics of a certain grade of L6 | 1.2714 | SKT4 steel, it is always advised to refer to the manufacturer's datasheet or specifications.

Coefficient of thermal expansionat °C	20-100	20-200	20-300	20-400	20-500	20-600
10-4m/(m*K)	12.1	13.1	13.2	13.5	14.1	14.3

Thermal Conductivity at °C	20	350	700
W/(m*K)	35	39	36

01
L6 | 1.2714 | SKT4 Hardness

Different hardness according to different Tempering temperature conditions.

· Annealed condition - 255 BHN max

· Hardened and Tempered condition- 38 to 42 HRC

· Hardness variation from surface to core – 20 to 25 BHN
02
Machinability

The machinability of tool steel L6 | 1.2714 | SKT4 is very good & It rates 90% of the machinability of the W-group water hardening low alloy steels rated 100% as a baseline.

Heat Treatment & Processes

01
Hardening

Heat the steel evenly to 820–840°C until the whole section reaches temperature. Then quench in oil to cool.
02
Normalizing

Heat the steel uniformly to about 900°C to achieve a normalized structure.
03
Annealing

Heat P20 steel to 770–790°C, hold it well at temperature, and then let it cool slowly inside the furnace.
04
Tempering

Heat the steel evenly and hold it for at least 1 hour per 25 mm of thickness at the chosen tempering temperature. Allow it to cool in still air.