H11 | 1.2343 | SKD6

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:

Chromium hot-work tool steels are classified as group H (H1-H19) by AlISI. H13 is the most widely used grade for hot and cold work tooling, valued for its toughness and fatigue resistance. Equivalent grades include EN/DIN 1.2344 (X40CrMoV5-1), JIS SKD61, GB 4Cr5MoSiV1, and G0ST 4X5MФ1C.

Chemical composition:

Corresponding international common brands				Hardness	Chemical Composition (%)
CHINA	US	JAPAN	GERMNAY	Hardness	C	Si	Mn	P	S	Cr	Ni	Mo	V
4Cr5MoSIV1	H11	SKDG	1.2343	HR≤230	0.36-0.38	1	0.4-0.55	-	-	5.0-5.15	-	1.2-1.3	0.35-0.4

Characteristics:

Excellent toughness.
Good tempering resistance and through-hardening properties.
Good performance under tempresure changes and themal stress fatigue.
Good high-temperature strength and resistance to thermal shock and thermal fatigue.
Excellent polishing performance of 12000# or above.
Good dimensional stability during heat treatment and surface treatment.

Applications:

Aluminum-zinc die-casting dies, light alloy pressure casting dies.
Aluminum alloy and copper alloy extrusion dies, long life hot forging dies.
Plastic hard molds with higher finish requirements such as car lamp mold, plastic mold with glass fiber and calcium powder added, bakelite . molds.
Plastic hard molds with complex rib and high toughness requirements, and large&complex deep cavity molds.

Mechanical Properties

Tensile Strength	Yield Strength	Hardness	Elongation	Impact Toughness
1792 MPa	1482 MPa	52-57 HRC	8%	13.6-33.9 J/cm2

Physical Properties

The physical properties can vary slightly depending on the specific composition and heat treatment of the H11 | 1.2343 | SKD6 steel. It's always recommended to refer to the manufacturer’s specifications for precise information.

Coefficient of thermal expansionat °C

20-100

20-200

20-300

20-400

20-500

20-600

20-700

10-6m/(m*K)

11.7

12.3

12.5

12.7

12.75

12.9

Thermal Conductivity °C	20	350	700
W/(m*K)Annealed	29.8	30	33.5
W/(m*K)Quenched & Tempered	26.7	27.4	30.4

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.