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KDA1S

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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

STANDARD
BRAZIL
AUSTRIA
EN
NOT GIVEN
VM13IM
W302
X40CrMoV5-1
SLOVANIA
ITALY
JIS
S.KOREA
UTOP M02-EFS
ESKY0S2
SKD61
STD61
TAIWAN
CZECH REP.
CHINA
AMERICA
GMH13
TLIEFS
YTR5
H-13

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		 Position of kda1s
Heat-check resistance
The KDA1S features finer cracks than the SKD61 and has a heat-check resistance
equivalent to the improved SKD61.
Heat check of kda1s		 Service life with heat check of kda1s
Machinability
Superior machinability after hardening and annealing to the SKD61
Relation between cutting speed and tool life		 Machinability after hardening to kda1s
Thermal processing characteristics
Thermal processing characteristics of kda1s Annealing temprature of kda1s
Annealing process temprature of kda1s
Melting-loss resistance Heat-softening resistance
The KDA1S features superior melting-loss resistance to the SKD61,
which is remarkably improved by surface treatment.Melting loss resistance of kda1s		 The KDA1S features superior heat-softening resistance to the SKD61.
Heat softening resistance of kda1s
Strength and tenacity
The KDA1S features superior tenacity to the SKD61.
Results of Charpy impact tests at room temperatureFeature strength of kda1s		 Tensile strength of kda1s
Physical properties
The KDA1S features superior tenacity to the SKD61. Results of Charpy impact tests at room temperature

Thermal expansion factor (x10-6/°C)
Temperature / °C
KDA1S
Improved SKD61
SKD61
100
8.84
9.01
9.67
200
10.31
10.35
11.11
300
11.15
11.12
11.92
400
11.88
11.78
12.54
500
12.44
12.35
13.10
600
12.90
12.85
13.61
700
13.17
13.11
13.91

Thermal conductivity (cal/cm,sec.°C)
Temperature / °C
KDA1
Improved SKD61
SKD61
30
0.062
0.069
0.059
200
0.077
0.078
0.069
400
0.075
0.079
0.068
600
0.075
0.076
0.068
700
0.073
0.075
0.067
800
0.071
0.074
0.066

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Kushal Metal & Steel Industries