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KDA1

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Introduction

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 KDS (equivalent to SKD61).

Grades Equivalent

STANDARD
BRAZIL
AUSTRIA
EN
1.2344
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 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.

Applications Position of KDA1 Heat-check resistance
+ Tools for hot projection
+ Hot forging dies
Position of kda1 Heat resistance of kda1
Thermal processing characteristics
Thermal processing of kda1 Annealing temperature of kda1
Austenite process temperature of kda1
Melting-loss resistance Heat-softening resistance
The KDA1 features superior melting-loss resistance to the SKD61,
which is remarkably improved by surface treatment.Melting loss resistance of kda1
The KDA1 features superior heat-softening resistance to the SKD61.
Heat softening resistance of kda1
Strength and tenacity
The KDA1 features superior tenacity to the SKD61.Feature strength of kda1 Tensile strength of kda1
Physical properties
The KDA1 has smaller thermal expansion than the SKD61. Lower thermal conductivity than the SKD61 yields less temperature gradient.

Thermal expansion factor (x10-6/°C)
Temperature / °C
KDA1
SKD61
100
9.01
9.67
200
10.35
11.11
300
11.12
11.92
400
11.78
12.54
500
12.35
13.10
600
12.85
13.61
700
13.11
13.91

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

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