Tool steel
KDA1KDA1SKDAMAX Hot work tool steel
The KDA1S is a new type of steel for die-casting that has the same basic functions of the KDA1 and features superior durability and cost-reduction performance.
Features of KDA1S

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 KDA1 and offers a longer service life.
2.Superior machinability after hardening and annealing.@30% or more higher machinability than the SKD61.@Approximately 5 times as high as the KDA1.
3.Superior tenacity@80% or more higher tenacity than the SKD61 (in the T direction).@Good tenacity equivalent to the KDA1.
4.Superior heat-softening resistance.@Twice as high heat-softening resistance as the SKD61 maintains high hardness for a long time.

@
Applications @ Position of KDA1S
Die-casting molds
Hot-forging dies
@
@
Heat-check resistance
The KDA1S features finer cracks than the SKD61 and has a heat-check resistance equivalent to the improved SKD61.
@
Machinability
Superior machinability after hardening and annealing to the SKD61
Thermal processing characteristics
Melting-loss resistance Heat-softening resistance
The KDA1S features superior melting-loss resistance to the SKD61, which is remarkably improved by surface treatment.
@ The KDA1S features superior heat-softening resistance to the SKD61.
@
Strength and tenacity
The KDA1S features superior tenacity to the SKD61.
Results of Charpy impact tests at room temperature
@
@
@
Physical properties
The KDA1S features superior tenacity to the SKD61. Results of Charpy impact tests at room temperature
Return to the Top of This Page

NIPPON KOSHUHA STEEL CO., LTD. 2007, All Rights Reserved
TOP