KDA1S

Introduction

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.

Grades Equivalent

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