High Speed Tool Steels

YSS High Speed Tool Steels

Chemical compositions of YSS High Speed Tool Steels

JIS AISI/ASTM
Grade equivalent W.Nr C Cr W Mo V Co
DIN/ISO
M2
YXM1 SKH51 1.3343 0.80-0.90 3.80-4.50 6.00-7.00 4.80-5.80 1.80-2.30 −
HS6-5-2
−
YXM4 SKH55 1.3243 0.85-0.95 3.80-4.50 6.00-7.00 4.80-5.80 1.80-2.30 4.50-5.50
Conventional High Speed Tool Steels

HS6-5-2-5
Molybdenum
HSS YXM27 − − 1.15-1.25 3.80-4.50 4.80-5.80 5.80-6.80 2.60-2.80 −

M42
YXM42 SKH59 1.3247 1.00-1.10 3.50-4.25 1.25-2.00 9.00-10.00 1.00-1.50 7.75-8.75
HS2-9-1-8

YXM60 − − 1.00-1.10 3.80-4.50 5.00-6.00 6.00-7.00 1.50-1.80 7.50-8.50

Vanadium −
XVC5 SKH57 1.3207 1.20-1.30 3.80-4.50 9.00-11.00 3.00-4.00 3.20-3.70 9.50-10.50
HSS
HS10-4-3-10
Tungsten T1
HSS YHX2 SKH2 1.3355 0.73-0.83 3.80-4.50 17.00-18.00 − 0.80-1.20 −
HS18-0-1
Matrix
YXR3 HSS − 0.6 4.3 − 2.9 1.8 −

Matrix Matrix
YXR33 HSS − 0.5 4.2 1.6 2.0 1.2 1.0 or less
HSS

Matrix
YXR7 HSS − 0.8 4.7 1.3 5.5 1.3 −
P/M High Speed Tool Steels

HAP10 − − 1.30-1.40 4.50-5.50 2.50-3.50 5.50-6.50 3.60-4.00 −

−
HAP40 SKH40 − 1.27-1.37 3.70-4.70 5.60-6.40 4.60-5.40 2.80-3.30 7.50-8.50
HS6-5-3-8

HAP50 − − 1.54-1.64 3.70-4.70 7.50-8.50 5.50-6.50 3.80-4.30 7.50-8.50

HAP72 − − 2.02-2.32 3.70-4.70 9.00-10.00 8.00-8.50 4.80-5.10 9.00-10.00

HAP5R − − 0.9 4.3 2.0 3.0 3.0 −

HSS: High Speed Tool Steel

YSS High Speed Tool Steels are used not only for cutting tools but also
various forming tools which require higher wear resistance and
toughness. Along with conventional type steels, there are some grades
made by powder metallurgy process (HAP series) that has superb wear
resistance and toughness because of higher alloy content and uniform
fine microstructure.

Yasugi (Kaigan) Works

<Attention> The characteristics, photos, charts, rankings and evaluations of this catalog are representative value by our test data,
it does not guarantee the quality of the product. This catalog and its contents are subject to change without notice. 2
 YSS High Speed Tool Steels

Features of YSS High Speed Tool Steels

YXM1 Standard Molybdenum high speed steel with superior toughness

YXM4 Standard Cobalt alloyed Molybdenum high speed steel with superior heat resistance
Conventional High Speed Tool Steels

Molybdenum
HSS YXM27 High Vanadium high speed steel with good wear resistance and grindability

YXM42 Super-hard high speed steel suitable for cutting for hard materials

YXM60 High-performance high speed steel with superior durability, toughness and grindability

Vanadium
HSS XVC5 High-performance Cobalt alloyed Vanadium high speed steel with wear/heat resistance

Tungsten
YHX2 Standard Tungsten high speed steel
HSS

YXR3 Matrix high speed steel for forging tools with superior toughness

Matrix
YXR33 Matrix high speed steel for forging tools with most superior toughness
HSS

YXR7 Matrix high speed steel for forging tools with superior strength/toughness
P/M High Speed Tool Steels

HAP10 Superior toughness effective to avoid chipping

HAP40 Most standard grade with good balance of hardness, toughness and wear resistance

HAP50 Higher hardness, good heat and wear resistance

HAP72 Good heat wear resistance and highest obtainable hardness of 70HRC

HAP5R Toughest P/M high speed steel

Outstanding Features;
・High toughness
・High wear resistance
・Stabilized heat treatment property
・Stable performance due to uniform and fine carbide distribution
・Good mechanical properties coming from fine and uniform grain size
・High purity with least inclusions and gases

<Attention> The characteristics, photos, charts, rankings and evaluations of this catalog are representative value by our test data,
it does not guarantee the quality of the product. This catalog and its contents are subject to change without notice. 3