YASUGI SPECIALTY STEEL

JAPANESE GERMANY

Materials for tools and cutlery
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HAP(TM) 50
( Original steel )

Chemical composition (%) ( typical )

Std.	AISI	DIN	W-Nr.	JIS	YSS
Designation	-	-	-	-	HAP(TM) 50
C	-	-	-	-	1.54-1.64
Si	-	-	-	-	-
Mn	-	-	-	-	-
Ni	-	-	-	-	-
Cr	-	-	-	-	3.70-4.70
Mo	-	-	-	-	5.50-6.50
W	-	-	-	-	7.50-8.50
V	-	-	-	-	3.80-4.30
Co	-	-	-	-	7.50-8.50
others	-	-	-	-	-

Standard Heat Treatment temperature ( centigrade )

Annealing	820-880 Slow cooling
Quenching	(1)1,200-1,220 Oil cooling (Hot bath) (2)1,180-1,200
Tempering	560-580 Air-cooling
Delivery hardness ( HBW )	293 or under
Hardening hardness ( HRC )	(1)67-69 (2)66-67

Application

Cutting tool for difficulty cut materials

YSS Recommended Tool Steels

YSS Symbol	Features
YXM(TM) 1	Standard Molybdenum high speed steel with superior toughness
YXM(TM) 4	Standard Cobalt alloyed Molybdenum high speed steel with superior heat resistance
YXM(TM) 27	High Vanadium high speed steel with good wear resistance and grindability
YXM(TM) 42	Super-hard high speed steel suitable for cutting for hard materials
YXM(TM) 60	High-performance high speed steel with superior durability, toughness and grindability
XVC(TM) 5	High-performance Cobalt alloyed Vanadium high speed steel with wear/heat resistance
YHX(TM) 2	Standard Tungsten high speed steel
YXR(TM) 3	Matrix high speed steel for forging tools with superior toughness
YXR(TM) 33	Matrix high speed steel for forging tools with most superior toughness
YXR(TM) 7	Matrix high speed steel for forging tools with superior strength/toughness
HAP(TM) 10	Superior toughness effective to avoid chipping
HAP(TM) 40	Most standard grade with good balance of hardness, toughness and wear resistance
HAP(TM) 50	Higher hardness, good heat and wear resistance
HAP(TM) 72	Good heat wear resistance and highest obtainable hardness of 70HRC
HAP(TM) 5R	Toughest P/M high speed steel

YSS Properties Comparison Table

YSS Symbol	Strength at elevated temperature	Quench and tempered hardness	Wear resistance	Machinability	Toughness
YXM(TM)1	A	C	C	C	B
YXM(TM)4	A	C	B	C	B
YXM(TM)27	B	C	B	C	B
YXM(TM)42	A	B	A	B	C
YXM(TM)60	A	B	A	B	C
XVC(TM)5	A	C	A	D	D
YHX(TM)2	A	C	C	B	C
YXR(TM)3	D	D	D	A	A
YXR(TM)33	C	D	D	A	A
YXR(TM)7	D	C	C	C	B
HAP(TM)10	D	C	A	B	B
HAP(TM)40	B	B	A	C	B
HAP(TM)50	B	B	A	B	B
HAP(TM)72	B	A	A	D	D
HAP(TM)5R	D	D	C	B	A