H13 | 1.2344 | SKD61

Category
Hot Work Tool Steel
Delivery condition
Hot rolled & Hot forged, Soft annealed to max.229HB
Supply form
Round bar, Flat bar

Introduction:

Chromium hot-work tool steels are classified as group H steels by the AISI classification system.This series of steels star from H1 to H19.H11 tool steel equivalent materia includes European EN, ISo, German DIN 1.2343/X37CrMoV5-1,Japanese JIS standard SKD 6, Chinese GB 4Cr5MoSiV, Rusia GOST 4X5MФC,etc

Chemical composition:

Corresponding international common brands				Hardness	Chemical Composition (%)
CHINA	US	JAPAN	GERMNAY	Hardness	C	Si	Mn	P	S	Cr	Ni	Mo	V
4Cr5MoSIV1	H13	SKD61/DHA1	1.2344	HR≤230	0.32-0.45	0.8-1.2	0.2-0.4	-	≤0.03	4.7-5.5	-	1.1-1.5	0.8-1.2

Characteristics:

Good resistance to abrasion at both low and high temperatures.
High level of toughness and ductility.
Good machinability and polishability.
Good high-temperature strength and resistance to thermal fatigue.
Excellent through-hardening properties.
Very limited distortion during hardening.

Applications:

PLASTIC MOULDING: Injection moulds, Compression/ transfer moulds;
EXTRUSlON:Backers, die holders, liners, dummy blocks, stems;
DIE CASTING: Fixed inserts, cores, Sprue parts, Nozzles, Ejector pins (nitrided), Plunger;
Others: Forming dies, die inserts, and tools for the manufacture of screws nuts, riverts and bolts.

Mechanical Properties

Tensile Strength	Yield Strength	Elongation	Impact Toughness	Hardness	Compressive Strength	Modulus of elasticity
1550 MPa-2050MPa	1000-1380 MPa	10%-15%	20 J/cm2-40 J/cm2	45-52 HRC	2550MPa	215 GPa

Physical Properties

Depending on the precise composition and heat treatment of the H13 steel, the physical attributes may differ somewhat. It's always advisable to refer to the manufacturer’s specifications for accurate information.

Coefficient of thermal expansionat °C	20-100	20-210	20-300	20-400	20-500	20-600	20-700
10-4m/(m*K)	10.8	12	12.4	12.7	13.1	13.3	13.5

Thermal Conductivity °C	20	350	700
W/(m*K)Annealed	27.1	30.4	33.2
W/(m*K)Quenched & Tempered	25.4	27.7	30.4

01
Machinability
H13 offers medium to good machinability. Its machinability is rated at 75% compared to the low-alloy, easy-to-machine W-series water-hardening tool steels.
02
Hardness
Hardness tests were performed on 1-inch round H13 samples that were air-quenched at 1850°F, then tempered for two hours before cooling.

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.