Hot Work Tool Steel

Hot work tools operate at elevated temperatures and form different products in aluminium, steel or other metals.
The most common application areas in hot work are die-casting, extrusion and forging. The high working temperatures put very high demands on the tool steel. The properties’ profile of material used for hot work should include an excellent hot strength as well as a very good ductility and toughness.

Other important tool steel properties are a high resistance against thermal cyclic stresses and a good hot wear resistance. The properties profile should be even in all directions in the tool steel for best performance.

Good strength at high temperatures
High ductility and toughness
(Include Details from Word Sheet)

Hot Works Tool Steel (KDA1)

Description

The KDA1 is a general-purpose hot-tool steel with a higher strength at high temperature and tenacity than the general-purpose hot-tool steel that is also actively used for hot forging dies, Extrusion, PDC Dies & special Hot application Moulds

Chemical Composition

C	Si	Mn	Cr	Mo	V
PATENTED

Standards

KDA1

SKD61 MOD

DAC-I

SKD61

Physical Properties

The KDA1 has smaller thermal expansion than the SKD61.
Lower thermal conductivity than the SKD61 yields less temperature gradient.

Applications

• Tools for hot projection
• Hot forging dies
• PDC Dies

Future of KDA1

1. Superior heat-check resistance

● Hard to crack in comparison with the SKD61, and has a finer structure.
● Has superior heat-check resistance equivalent to the KDA1S and offers longer service life.

2. Superior tenacity

● 80% or more higher tenacity than the SKD61 (in the T direction).
● Good tenacity equivalent to the KDA1S.

3. Superior heat-softening resistance

● Twice as high heat-softening resistance as the SKD61 maintains high hardness for a long time.

Heat-check Resistance

Position Of KDA1

Thermal Processing Characteristics

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GLORIA (AISI)	DIN	JIS	BOHLER	UDDEHOLM	HITACHI
H11	1.2343	SKD6	W300	8402/ORVAR 2M	-
H13	1.2344	SKD61	W302	8407 2M/ORVAR 2M	DAC**
H13 ESR	-	-	-	ORVAR SUPREME	-
L6	1.2714	SKT4	W500	ALVAR 14	DM
H21	1.2581	SKD5	W100	-	-
A8 MOD	1.2362 MOD	-	-	-	-

Grade	C	Si	Mn	P	S	Cr	Mo	V	Ni	Cu	W	Co	Application
H11	0.38	0.93	0.32	0.021	0.006	4.99	1.24	0.43	0.16	0.09	-	-	Hot extrusion tools, Tools for manufacture of screws, Nuts, Bolts etc.
H13	0.37	1.00	0.34	0.020	<0.001	5.09	1.16	0.84	0.2	0.07	-	-	Die casting tools & Extrusion tool, shear blade, Plastic mould, Tool for manufacture of screw, nut etc.
H13 ESR	0.36	0.88	0.33	0.022	<0.001	5.10	1.18	0.85	0.2	0.07	-	-	Die casting tools & Extrusion tool for Al, Zn, Mg.5hear blade, Plastic mould etc.
L6	0.54	0.26	0.88	0.013	<0.001	1.09	0.51	0.10	1.67	-	-	-	Hammer dies, Press forging dies, Shear blade etc (Pre hardend on supply)
H21	0.29	0.28	0.23	0.018	0.003	3.27	-	0.35	0.13	0.05	9.05	-	Used for hot working dies and tooling such as die casting, Extrusion and hot forming of parts. Pressure die casting tools, moulds for Cu and Cu-alloys.
A8 MOD	0.50	0.92	0.39	0.014	0.002	8.15	1.37	0.40	0.23	0.08	0.01	-	Intermediate rolls for cluster mills, trimming dies, hot cutting shears.

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