YASUGI SPECIALTY STEEL

JAPANESE GERMANY

Materials for tools and cutlery
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YCK(TM) 2
( Orignal steel )

Chemical composition (%) ( typical )

Std.	AISI	DIN	W-Nr.	JIS	YSS
Designation	-	-	-	-	YCK(TM) 2
C	-	-	-	-	0.50
Si	-	-	-	-	0.90
Mn	-	-	-	-	0.40
Ni	-	-	-	-	-
Cr	-	-	-	-	8.50
Mo	-	-	-	-	1.70
W	-	-	-	-	1.20
V	-	-	-	-	0.30
Co	-	-	-	-	-
others	-	-	-	-	-

Standard Heat Treatment temperature ( centigrade )

Annealing	750-800 Slow cooling
Quenching	1030 Oil cooling
Tempering	500 Air-cooling
Delivery hardness ( HBW )	265 or under
Hardening hardness ( HRC )	52 over

Application

Woodwork cutlery

YSS Recommended Tool Steels

YSS Symbol	Features
SLD-MAGIC(TM)	High-performance cold work tool steel attaining both extended die life and easy die fabrication.
SLD(TM)	Cold work die steel with high abrasion resistance for general use, excellent harden-ability and minimal quench stress.
SLD(TM)10	Extreamly high hardness with excellent toughness in die steels, 62-64HRC.
ARK(TM) 1	Cold work die steel with high toughness and improved machinability.
SGT(TM)	Cold work die steel with superior machinability for general use; Special care is required for quenching large-size dies or wire electric discharge machining.
YCS(TM) 3	Carbon tool steel for small production to be quenched in oil. Improved SK105 grade for its hardenabillty.
ACD(TM) 37	Vacuum quenched and air quenched steel. Improved SGT(TM) grade for its hardenability and wire electric discharge machinability.
HMD(TM) 5	Steel for ame hardening, resulting in high hardness and small strain even with air quenched; good weldability.
HI-PM MAGIC	40HRC pre-hardened steel.
YXM(TM) 1	High speed steel with high abrasion resistance and toughness for general use.
YXM(TM) 4	High speed steel to prevent from abrasion, seizure and deformation under high pressure
YXR(TM) 7	Matrix high speed steel, extremely highest toughness in 62-65HRC. Available for vacuum quenching.
YXR(TM) 3	Matrix high speed steel for general use, extremely highest toughness in 58-61HRC.
YXR(TM) 33	Matrix high speed steel highest toughness in high speed steels. Standard hardness 54-58HRC.
HAP(TM) 5R	Extremely tough Powder Metallurgy process high speed steel.
HAP(TM) 10	Extremely tough Powder Metallurgy process high speed steel.
HAP(TM) 40	P/M high speed steel with high abrasion resistance and toughness for general use.
HAP(TM) 72	P/M high speed steel with high hardness and highest abrasion resistance.

YSS Properties Comparison Table

Grade	Wear resistance	Pressure resistance	Toughness	Hardenability	Distortion by heat treatment	Machinability	Weldability
SLD-MAGIC(TM)	A	A	A	A+	A+	A	B
SLD(TM)	A	A	B	A+	A+	B	C
SLD(TM)10	A	A	A	A+	A	B	C
ARK(TM)1	B+	A	A	A+	A	A	B
SGT(TM)	C	B+	B	C	D	A	B
YCS(TM)3	D	C	C	D	D	A+	B
ACD(TM)37	B	A	B	A+	A	A	B
HMD(TM)5	C	B	B	-	-	A	A
HI-PM MAGIC	D	D	A++	-	-	A	A+
YXM(TM)1	A	A+	A	B	B	B	C
YXM(TM)4	A++	A+	B	B	B	B	C
YXR(TM)7	A	A+	A	A	B	B	C
YXR(TM)3	A	A	A+	B	B	B+	C+
YXR(TM)33	B	B+	A++	A	B	B+	C+
HAP(TM)5R	A	A	A+	A	A	B	C
HAP(TM)10	A+	A+	A	A	A	B	C
HAP(TM)40	A++	A++	A	B	A	C+	C
HAP(TM)72	A+++	A+++	C	AA	A	C	D