COLD WORKING TOOL

STEELS

1
 Characteristics of YSS Cold Work Tool Steels

For high performance service

HAP72

XVC5 P/M high speed steel

Strength
HAP40
YXM4
Abrasion resistance, Strength

HAP10
YXM1 Toughness
Strength HAP5R
YXR7
S-MAGIC Matrix high speed steel
Abrasion resistance
SLD
YXR3
SLD8
ARK1 Toughness
Air hardened steel
ACD37 Excellent machinability YXR33 DAC
SGT
COLD WORK TOOL STEELS

Simplified small Free cutting and

Flame hardend steel production pre-hardened steel
YCS3
DAC

Toughness

• Comparison of charactistics
Strength Distortion Standard
YSS Abrasion Pressure at elevated by heat hardness
grade resistance resistance Toughness Hardenability Machinability Weldability
temperature treatment (HRC)

S-MAGIC A A B A– A+ A+ A– B 58~62
SLD A A B B A+ A+ B C 57~63
ARK1 B+ A B A A+ A+ A B 58~60
SLD8 A– A B+ A– A+ A B+ C 58~63
SLD10 A– A+ A– A– A+ A B– C 59~65
CRD A+ A C C B– B C D 57~63
YCS3 D C D C D D A+ B 57~63
SGT C B+ D B C D A B 57~63
ACD37 B A– C B A+ A A B 55~60
HMD5
C B D B — — A A 55~60
HMD1
HPM1
D– D D A– — — A– A 40
HPM2T
YXM1 A A+ A A– B B B C 58~64
YXM4 A++ A+ A+ B B B B– C 62~66
XVC5 A+++ A++ A++ C B B– C D 63~67
YXR7 A A+ A A A B B C 61~65
YXR3 A– A A A+ B B B+ C+ 58~61
YXR33 B B A+ A++ A B B+ C+ 54~58
HAP5R A A+ A A+ A A B C 58~62
HAP10 A+ A+ A A A A B– C 62~65
HAP40 A++ A++ A++ A– B A C+ C 64~67
HAP72 A+++ A+++ A+++ C A– A C– D 68~71
(A is the uppermost level and + indicates higher performance)

2
 Applications and YSS grade Features
YSS
Main applications Features
grade
High performance cold work tool steel attaining both extended mold
S-MAGIC Cold work dies for high-tensile steels,
lifespan and outstandingly easy mold fabrication. 60~62 HRC with
(NEW) SUS, mass production, and general use.
high temperature. tempering. Excellent wear & galling resistance.
Cold work dies for general use, forming Cold work die steel with high abrasion resistance for general use,
SLD roll, shear. excellent harden-ability and minimal quench stress.

Dies for printed circuit board, Cold work die steel with high toughness and improved machinability.
ARK1
die plates, stripper plates. The same heat treatment conditions as SKD11.

SLD8 62HRC or more with high temperature tempering, superior

Rolling dies, cold forging dies.
machinability and toughness.

Extremely highest hardness in die steels.

SLD10 Rolling dies.
62-64HRC, with excellent toughness.

Drawing dies, blanking dies for mass

CRD Cold work die steel with highest abrasion resistance.
production, brick liner.
COLD WORK TOOL STEELS

Carbon tool steel for small production to be quenched in oil , easy to

YCS3 Press forming dies, jigs and tools.
heat-treat.

Cold work die steel with superior machinability for generaluse; Be careful
SGT Dies for deep drawing, gauges.
with quenching large dies and wire electric discharge machining.

Vacuum quenched and air quenched steel, improved for SGT as to

ACD37 Dies for deep drawing, gauges.
hardenability and wire electric discharge machinability.

HMD5 Steel for flame hardening, resulting in high hardness and small strain
Dies for deep drawing.
HMD1 even with air quenched; good weldability.

Press forming dies for small production,

HPM1 Free cutting and fully hardened steel, good nitriding characteristics.
jigs and tools.

Cold forging dies, High speed steel with high abrasion resistance and toughness for
YXM1 general use.
cold heading dies, slitter.

YXM4 High speed steel to prevent from abrasion, seizure and deformation
Cold forging dies, drawing dies. under high pressure.
XVC5

Rolling dies, cold forging dies, roll, cold Matrix high speed steel, extremely highest toughness in 62-65HRC.
YXR7
forging panches, blanking panches. available to vacuum quenching.

Dies to be used for cracking or chip Matrix high speed steel for general use, extremely highest toughness
YXR3
breaking resistance. in 58-61HRC.

Cold forging dies, Matrix high speed steel extremely highest toughness in high speed
YXR33
warm forging dies. steels.

Standard hardness 56-58HRC.

HAP5R Cold forging dies, fine blanking dies. Extremely tough Powder Metallurgy process high speed steel.

HAP10 Fine blanking dies. Extremely tough Powder Metallurgy process high speed steel.

Press forming dies for mass production, P/M high speed steel with high abrasion resistance and toughness
HAP40
roll. for general use.

Cold plastic working dies of long life, P/M high speed steel with high hardness and highest abrasion
HAP72 high performanced IC molds. resistance.

3
 Type and Chemical Compositions
Grade Chemical Composition (%)

YSS JIS equivalent C Si Mn P S Ni Cr W Mo V Co

S-MAGIC Patent pending High performance cold work tool steel

SLD SKD11 1.50 0.25 0.45 ≤ 0.025 ≤ 0.010 – 12.00 – 1.00 0.35 –

ARK1 Patented steel High toughness cold work tool steel

SLD8 Patented steel High strength cold work tool steel

CRD SKD1 2.10 0.25 0.45 ≤ 0.025 ≤ 0.010 – 13.50 – – – –

YCS3 SKS93 1.05 0.35 0.80 ≤ 0.030 ≤ 0.030 – 0.40 – – – –

SGT SKS3 0.95 0.25 1.05 ≤ 0.025 ≤ 0.010 – 0.75 0.75 – – –

ACD37 0.85 0.25 2.10 ≤ 0.025 ≤ 0.010 – 1.20 – 1.50 – –

HMD5
Original steel Flame hardened tool steel
HMD1

HPM1 Patented steel 0.12 0.30 0.90 ≤ 0.025 ≤ 0.10 3.00 – – 0.30 Cu2.2 Al1.0

YXM1 SKH51 0.85 0.25 0.35 ≤ 0.025 ≤ 0.010 – 4.15 6.50 5.30 2.05 –
COLD WORK TOOL STEELS

YXM4 SKH55 0.85 0.25 0.35 ≤ 0.025 ≤ 0.010 – 4.15 6.50 5.30 2.05 5.00

XVC5 SKH57 1.25 0.25 0.35 ≤ 0.025 ≤ 0.010 – 4.15 10.00 3.50 3.45 10.00

YXR7
Original steel Matrix high speed steel
YXR3

YXR33 Patented steel Extremely tough matrix high speed steel

HAP5R P/M high Extremely tough P/M high speed steel

HAP10 speed steels 1.3 – – – – – 5.0 3.0 6.0 4.0 –

HAP40 SKH40 1.3 – – – – – 4.0 6.0 5.0 3.0 8.0

HAP72 Patented steel 2.1 – – – – – 4.0 9.5 8.2 5.0 9.5

4
 Heat Treatment
(1)Annealing (2)Holding time at hardening temperature
1. All material is delivered as spheroidized annealed
condition. • High speed tool steel
2. When used after reforging, spheroidized annealing is 1. Preheating time 1st stage: 30 minutes for every
to be done before hardening. 25 mm of the tool at 500-550°C
3. Stress relief annealing is to be done in order to 2nd stage: (holding time X 2) at 850°C
remove stress occured by cold working such as cold 3nd stage: (holding time X 2) at 1,050°C
drawing, cold rolling or cutting and machining. Preheating is (holding time X 2) at 900°C for small thickness (50
• Heating temperature: 650-700°C mm max.) and simple shape tools, and wherever facilities are limited.
• Holding time: 1h/25mm thickness The first stage can be omitted for small tools.

2. Holding time at hardening temperature (holding time)

Thickness (mm)
Furnace type Time 5 10 20 30 40 50 60 70 80 90

Holding time (sec) 60 90 160 240 280 350 390 420 440 495
Salt bath
Thickness X multiple X12 X9 X8 X8 X7 X7 X6.5 X6 X5.5 X5.5

Note: Use the holding time in the salt bath as the immersion time.
COLD WORK TOOL STEELS

• Cold die steels, alloy tool steels and carbon tool steels
1. Preheating time 1st stage: (holding time X 2) at 500-550°C
2nd stage: (holding time X 1) at 750-800°C
(Unnecessary for SK, SKS)
Except that preheating can be omitted wherever an electric furnace is used or for small tools (50mm or less thickness) and simple
shape tools.

2. Holding time at hardening temperature (holding time)

Thickness (mm)
Furnace type ≤ 15 25 50 75 100 125 150 200 300
Time
Salt bath or
Holding time (min) 15 25 40 50 60 65 70 80 100
electric furnace
Note: Using salt bath needs preheating and the holding time used as the immersion time.

(3)Holding time at tempering temperature

Thickness (mm) ≤ 25 26~35 36~64 65~84 85~124 125~174 175~249 250~349 350~499

Holding time for

1 1.5 2 3 4 5 6 7 8
tempering (h)
Note: Apply this standard to tempering at 500°C or more, and increase elongate tempering time to tempering temperature X 1.5 for 250-500°C
and holding time X 2 for tempering temperature less than 250°C

(4)Dimensional changes after heat treatment

0.25

Radial direction

0.20
Dimensional change rate (%)

Longitudinal direction

0.15

0.10

0.05

0
S-MAGIC SLD ARK1 SLD8 ACD37 SGT YCS3 YXM1 YXR7 YXR3 YXR33 HAP10 HAP40
1,025°C 1,025°C 1,025°C 1,025°C 850°C 825°C 800°C 1,200°C 1,160°C 1,150°C 1,140°C 1,130°C 1,130°C Hardening temperature
505°C 200°C 520°C 530°C 200°C 200°C 200°C 575°C 560°C 570°C 580°C 570°C 570°C Tempering temperature

5
 Heat Treatment
(5) Standard heat treatment conditions
Annealing Hardening Tempering
YSS grade Hardness Hardness
Temperature (°C) (HBW) Temperature (°C) Temperature (°C) (HRC)
830-880 1010-1040
S-MAGIC Slow cooling ≤ 255 Air quenching 480~530 Air cooling ≥ 60
830-880 1000-1050 (980-1030)
SLD Slow cooling ≤ 248 Air quenching (Oil quenching) 150~200 Air cooling ≥ 58
830-880 1010-1040
ARK1 Slow cooling ≤ 248 Air quenching 480~530 Air cooling ≥ 58
830-880 1020-1040
SLD8 Slow cooling ≤ 248 Air quenching 520~550 Air cooling ≥ 60
830-880 930-980 (950-1000)
CRD Slow cooling ≤ 248 Oil quenching (Air quenching) 150~200 Air cooling ≥ 61
750-780 790-850
YCS3 Slow cooling ≤ 212 Oil quenching 150~200 Air cooling ≥ 63
750-780 800-850
SGT Slow cooling ≤ 217 Oil quenching 150~200 Air cooling ≥ 60
750-800 830-870
ACD37 Slow cooling ≤ 235 Air quenching 150~200 Air cooling ≥ 58
825-875
HMD5 / HMD1 Slow cooling ≤ 235 Flame hardening
800-880 (1)1220-1240 (2)1200-1220
YXM1 Slow cooling ≤ 255 Oil quenching 550~570 Air cooling ≥ 63
800-880 (1)1230-1250 (2)1210-1230
YXM4 Slow cooling ≤ 277 Oil quenching 560~580 Air cooling ≥ 64
820-880 (1)1230-1250 (2)1210-1230
XVC5 Slow cooling ≤ 285 Oil quenching 550~580 Air cooling ≥ 64
COLD WORK TOOL STEELS

800-880 (1)1160-1180 (2)1120-1160

YXR7 Slow cooling ≤ 241 Oil quenching 550~580 Air cooling ≥ 61
800-880 (1)1150-1170 (2)1130-1150
YXR3 Slow cooling ≤ 241 Oil quenching 560~590 Air cooling ≥ 58
800-880 1080-1160
YXR33 Slow cooling ≤ 241 Oil quenching 550~600 Air cooling ≥ 55
820-870 1120-1160
HAP5R Slow cooling ≤ 269 Oil quenching 530~580 Air cooling ≤ 58
820-870 (1)1170-1190 (2)1120-1170
HAP10 Slow cooling ≤ 269 Oil quenching 530~580 Air cooling ≥ 61
820-870 (1)1190-1210 (2)1120-1190
HAP40 Slow cooling ≤ 277 Oil quenching 560~580 Air cooling ≥ 64
820-870 1180-1210
HAP72 Slow cooling ≤ 352 Oil quenching 560~580Air cooling ≥ 68

(1) Simple shape tools

(2) The others, especially needs toughness
*Sample size is 15mm square or round and 20mm length based on the JIS Standard hardness test.

(Half temperature time: time requred to cool from

(6) Hardenability the austenitizing temperature to half that temperature)
{(austenitizing temperature + room temperature) / 2}
70

60 Maximum diameter of bar for which the center

YXR7(1,180°C)
hardness of 60HRC can be achieved

SGT(850°C)
CRD
50 (980°C)
YXM1(1,180°C)

XVC5 SLD(1,025°C)
40
(1,230°C)
Hardness
(HRC)

30

20 8ø 20ø 170ø

70ø 180ø
10 • • • 550ø
1.0 2.0 3.0 4.0 6.0 8.0 10 20 30 40 60 80 100 200 400 600 8001,000
Half temperature time (min) [ :air quenching, :oil quenching]

6
 Quenched and tempered hardness curve
S-MAGIC SLD ARK1
70 70 70

1,050°C

65 65 1,050°C 65

1,030°C
1,025°C
1,030°C
60 60 60

Hardness (HRC)
Hardness (HRC)

Hardness (HRC)
1,000°C
55 55 55

1,010°C
50 50 50

45 45 45

40 40 40
0 100 200 300 400 500 600 0 100 200 300 400 500 600 0 100 200 300 400 500 600
Tempering temperature (°C) Tempering temperature (°C) Tempering temperature (°C)
COLD WORK TOOL STEELS

CRD YCS3 SGT

70 70 70

(Oil quenching) (Oil quenching)

1,000°C
850°C
60 60 60
Hardness (HRC) 800°C
Hardness (HRC)
Hardness (HRC)

YCS3
975°C (820°C Oil quenching)
925°C 825°C
50 50 50

40 40 40

30 30
0 100 200 300 400 500 600 30 0 100 200 300 400 500
0 100 200 300 400
Tempering temperature (°C) Tempering temperature (°C) Tempering temperature (°C)

ACD37 YXM1 HAP5R

68 68 68
1,240°C
1,220°C
66 66 66
830°C 1,180°C
1,200°C
64 64 64 1,160°C
Hardness (HRC)
Hardness (HRC)

Hardness (HRC)

855°C 1,140°C
62 62 62
1,180°C
60 60 60
880°C
1,160°C
58 58 1,120°C
58

1,100°C
56 56 56

54 54 54
100 200 300 500 520 540 560 580 600 620 500 520 540 560 580 600
Tempering temperature (°C) Tempering temperature (°C) Tempering temperature (°C)

7
 Quenched and tempered hardness curve
YXR7 YXR3 YXR33
70 66 62
1,160°C
64 60
68
62 58
1,180°C
1,175°C 1,140°C
66 1,160°C 60 56
Hardness (HRC)

Hardness (HRC)
Hardness (HRC)
1,150°C
1,125°C 1,120°C
1,140°C 58 54
64
56 52

62 54 50

1,120°C 52 48
60
50 46

58 48 44
500 520 540 560 580 600 500 550 600 700 500 550 600 650
Tempering temperature (°C) Tempering temperature (°C) Tempering temperature (°C)
COLD WORK TOOL STEELS

HAP10 HAP40 HAP72

70 70 72
1,200°C
1,200°C
1,180°C
68 1,180°C 68 1,160°C
1,160°C 1,140°C 70
1,140°C 1,120°C
66 1,120°C 1,160°C
66 1,180°C
64 68
1,200°C
Hardness (HRC)

Hardness (HRC)
Hardness (HRC)

64 1,220°C
62
66
60 62

58 64
1,100°C 60
1,075°C
1,050°C 1,100°C
56
1,025°C 1,075°C 62
58
1,050°C
54
1,025°C
52 56 60
520 540 560 580 600 520 540 560 580 600 500 520 540 560 580 600
Tempering temperature (°C) Tempering temperature (°C) Tempering temperature (°C)

8
 Properties
•Abrasion resistance
Specific abrasion volume(mm3/mm2• mm)X10-7
YSS grade Hardness (HRC)
0.5 1.0 1.5 2.0

S-MAGIC 62.0

SLD 60.0

ARK1 59.0
SLD8 62.5

YCS3 60.0

SGT 60.0

ACD37 60.0
YXM1 65.5

XVC5 67.0

YXR7 65.0
YXR3 59.0

YXR33 58.0
COLD WORK TOOL STEELS

HAP5R 60.0 The Ogoshi type abrasion

tester was used to
determine abrasion
HAP10 64.0 resistance of matched
SCM415 samples, tested
HAP40 67.0 under the following
conditions: abrasion length
HAP72 70.0 of 400 mm, load of 67N,
and friction speed of 0.78 m/sec.

• Toughness
(kgf/mm2) (N/mm2)
YXR3 Bending strength 6,000
600
ARK1 YXR7 HAP10
500 5,000
YXM1
Bending Strength

HAP5R
HAP40 4,000
400 YXM4
S-MAGIC
SLD XVC5
HAP72 3,000
300 SGT V60
CRD V50
V40
200 2,000
(kgf-m/cm2) (J/cm2)
20 200
100 1,000 Charpy impact value
56 58 60 62 64 66 68 70 72 YXR33
YS
Hardness (HRC) M
15 150
10R Charpy impact value

YXR3 HAP5R
10 100

ARK1
6 60
HA
P1
S-MAGIC 0
4 HAP40 YXR 40
7
SLD YXM
2 YXM4 1
HAP7 20
XVC5 2

0
0 54 56 58 60 62 64 66 68 70
Hardness (HRC)

9
 Available Size Range (by Rolling)
•Round and Spuare Bars
Shape
(Unit: mm)

diameter or
Round bar Square bar
parallel side
Dimension 0 0.5 1 1.5 2 2.5 3 3.5 4 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 0 1 2 3 4 5 6 7 8 9 9.5

180

170

160

150

140

130

120

110

100

90

80
COLD WORK TOOL STEELS

70

60

50

40

30

20

10

•Flat Bars
Width (mm)
50 65 75 90 105 130 155 185 205 255 305 355 405 460
Thickness
(mm)
6

10

13

16

19

25

32

38

50

65

75

100

110

120

130

140

10
 Hitachi Metals, Ltd. http://www.hitachi-metals.co.jp/
Head Office SEAVANS North Building, 1-2-1, Shibaura, Minato-ku, Tel. +81-3-5765-4410
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•The characteristics listed in this catalog are representative average

values which may differ from actual product characteristics.

•This catalog and its contents are subject to change without notice.
•Do not duplicate this catalog without permission from Hitachi
Metals,Ltd.

•Please contact a representative of our Specialty Steel Division if

there are any questions or problems.

Our address and contact indicated in this catalog are those as of November 2007.
If you cannot put a call through, please contact our Corporate Communication Group.
in Tokyo below.
Tel:+81-3-5765-4076
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E-mail : hmcc@hitachi-metals.co.jp

January 2008 (PDF)