EXEO-SP

For wear resistant parts

EXEO-SPNACHI developed the EXEO series alloys in company-wide combined and connected engineeringsystem by first analyzing and determining necessary characteristics and then applying Nachi original
alloy design and special melting technologies.
EXEO-SP shows superior wear resistance, so it is the best suitable for parts where it is desirable tosuppress degradation of surface smoothness caused by friction.
L Alloy composition is accurately controlled by using special melting technology.
LNachi original technologies make it with well balanced distribution of carbides and matrix alloy elements.
LIt is much better than cemented carbides for wear resistant parts because of its good workability and cost
performance.

Applications
EXEO-SP is used as backing plate of cylindrical grinding machine and contributes to long-life of the part.
Applications are;
Bearing Inner & Outer, Bush, Collar, Piston, Torque Converter, etc.
Internal grinding

Strong frictional force generated

Cylindrical grinding

Strong frictional force generated

Magnetic force

Magnetic force

Inverse rotation

Inverse rotation
Rotation

Rotation

Bearing race

Bearing race

Backing plate

Backing plate

PropertiesComparison as wear resistant parts
Hardness0.004

700.003650.002600.001

55050

SUJ2 (52100)

EXEO-SP
MaterialHardness (HRC)

Amount of wear

Wear (mm)Damage on wear surface

750.005

SUJ2 (52100) wear surface

EXEO-SP wear surface

EXEO-SP has 15x the wear resistance compared to SUJ2 (52100)

EXEO-SPFor wear resistant parts

Properties
Mechanical properties
Low frequency fatigue strength test

Wear test by Ogoshi method−55×10−5
4×10−5

Rotor: SCM435
Distance: 200 m
Load: 18.8 kg
Friction speed: 0.250 m/sStress (GPa)Wear ratio (mm3/kgfvm)

6×10

3×10−52×10−5
1×10−50EXEO-SP
Hardness(HRC)
Better65

PM HSS

Matrix HSS

SKH51(M2)

65

62

2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4

EXEO-SP

Matrix HSS

1×103

1×104

1×106

Fractured cycles (-)

59

EXEO-SP has better wear resistance compared to PM HSS
even under low speed and high load conditions.

1×105

EXEO-SP has few non-metallic inclusions and superior
fatigue strength.

Hardness chart

Production range
L Available either finished or semi-finished.

70

L Contact us for production specifications, delivery times,and minimum orders.

Hardness (HRC)

68

Shape

Range of dimensions (mm)Forged round bar

F40 ~ 200

Rolled round bar

F13 ~ 100

Forged flat bar

Contact us for details ( 30 - 200)

Rolled flat bar

Contact us for details ( t 3 – 48)

Ground rod( F2 ~ 13) × 2000L

Drawn coil

F1.3 ~ 1266

Austenitizing temp
6462601200°C
1180°C
1160°C
1140°C1120°C
1100°C
AsQ

520

540560580

600

Tempering temperature (°C)

EXEO-SP can be hardened to over 68 HRC atcomparatively average quenching temperatures (in avacuum furnace at about 1180°C). This makes it very
effective for applications where wear resistance is required.

Unauthorized reproduction of these materials is prohibited.
L Information in this catalog may be changed without prior notice due to technical advancements or product developments. While care has beentaken to produce these materials, NACHI Fujikoshi accepts no responsibility for damages caused by misprints or omissions that may occur during
the publication of this catalog.
L Please note that the characteristics and values provided here are typical examples which may differ from the characteristics of the actual product.

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