Material grade

FlatRound

Width

Thickness

Length

x x

Daido DCMX

Daido DRM1

Daido DRM3

Daido NAK80

Hardox 400

Hardox 450

Hardox 500

Hardox 600

Minkor

TENA STEEL

Toolox 33

Toolox 44

1.1730

1.2311

1.2312

1.2343

1.2343 ESU

1.2363

1.2379

1.2436

1.2767

1.2842

1.3343

1.4112

1.7131

Daido DRM1

Steel Glossary
Daido DRM1

Material info

Chemical Composition %

	C	Si	Mn	Cr	Mo	W	V	Co
Typical Composition (Weight %)	0.5	0.2	0.5	4.2	1.0	3.0	1.3	2.0

	Treatment Temperatures			Hardness
Hot Forming	Annealing	Hardening	Tempering	Soft Annealing	Hardened
(please inquire)	800 - 880°C Slow cooling	1,100 - 1,140°C Quenching in oil, gas, or salt bath	550 - 620°C Minimum 2x tempering, air-cooling	≤ 235 HB	56 – 58 HRC

Physical Properties
Coefficient of thermal expansion [10^-6/K]	20 - 100°C	20 - 200°C	20 - 300°C	20 - 400°C	20 - 500°C	20 - 600°C	20 - 700°C	20 - 800°C
Coefficient of thermal expansion [10^-6/K]	11.2	11.4	11.7	11.9	12.2	12.4	12.7	12.3
Thermal Conductivity [W/mK]	25°C	200°C	300°C	400°C	500°C	600°C	700°C
Thermal Conductivity [W/mK]	22.4	26.3	27.3	28.6	28.4	29.1	28.8
Specific Heat [J/kgK]	25°C	200°C	300°C	400°C	500°C	600°C	700°C
Specific Heat [J/kgK]	413	487	519	562	616	705	840

E-Modul = 210 GPa, The Sample Was Hardened At 1,140°C And Tempered Twice At 560°C

Microstructure

DRM1

(In The Center Of The Bar, Diameter 100 mm)

Conventional Hot Work Steel

(Daido)

Tempering Treatment

Sample: Square 15 mm, quenched in oil, tempered with air cooling

Charpy Impact Toughness

Samples: taken from round bar, in the center of the diameter 100 mm, notched U-shaped specimen

Impact strength of matrix hot work high-speed steel DRM1

	Heat Treatment
	Hardening	Tempering
DRM1	1,140°C, oil quenched	540 - 600°C, double tempered
Conventional Steel	1,120°C, oil quenched	540 - 600°C, double tempered

Time-dependent tempering resistance

Tempering stability over time of matrix hot work high-speed steel DRM1

	Heat Treatment
	Hardening	Tempering
DRM1	1,140°C, oil quenched	600°C, double tempered
Conventional Steel	1,120°C, oil quenched	610°C, double tempered

Hardness at Elevated Temperatures

Hot hardness properties of matrix hot work high-speed steel DRM1

	Heat Treatment
	Hardening	Tempering
DRM1	1,140°C, oil quenched	560°C, double tempered
Conventional Steel	1,140°C, oil quenched	560°C, double tempered

Fire Crack Resistance

Sample: ∅ 15 mm, 10 mm thick

Thermal crack resistance of matrix hot work high-speed steel DRM1

	Heat Treatment
	Hardening	Tempering
DRM1	1,140°C, oil quenched	560°C, double tempered
Conventional Steel	1,140°C, oil quenched	560°C, double tempered
Test Method	Induction heating to 700°C, cooling to 20°C, repeated 1,000 times

Endurance Strength / Material Fatigue

Samples: taken from the center of a bar ∅ 100 mm

Fatigue strength of matrix hot work high-speed steel DRM1

	Heat Treatment
	Hardening	Tempering
DRM1	1,140°C, oil quenched	560°C, double tempered
Konventional Steel	1,140°C, oil quenched	560°C, double tempered
Test Method	Wöhler bending Test at room temperature

Hardenability

Sample: Round steel ∅ 100 mm

Hardenability - impact strength of matrix hot work high-speed steel DRM1

	Wärmebehandlung
	Härten	Anlassen
DRM1	1,140°C, 200°C/min entsprechend Ölhärtung	560°C, zweifach angelassen

Dimensional Changes During Hardening

Specimens: Rod steel ∅ 100 mm x 60 mm length

	Heat Treatment
	Hardening
DRM1	1,140°C, oil quenched

Hardness processes

Salt bath

Vacuum

Nitriding

Example of the microstructure of a nitrided surface using Daido Amistar's PS process.

Hardness profile after nitriding.

The surface hardness reaches 1,200 HV with NHD = 0.2 mm.

Representative technical values are provided based on our investigations. Unless otherwise stated, they do not constitute guarantees. Please seek individual advice for specific cases.