www.silicolloy.co.jp

Hardness vs Corrosion Resistance

PHOENIX INTERNATIONAL CORPORATION＆ SI TECHNO CORPORATION

Silicolloy A2 and Silicolloy XVI are superior in the hardness and corrosion-resistant balance.
70®
Hardness（HRC）

60

MicrostructureIntermetallic compound● Silicolloy XVI

50 ■
40

● Silicolloy A2

AISI420● AISI17400

30
20

AISI304L

10

HRC48-52

HigherHardness

Corrosion
Resistance

SeizureResistance

SUS310S
AISI310
S

Corrosion
ResistanceHeat
Resistance

100

Heat
ResistanceCorrosion
Resistance200

AISI316L●400300

pitting potential（mV）

Silicolloy A2（×5000） Silicolloy XVI（×5000）

Heat
Resistance

Wear
Resistance

00Figure 1 - After 500 hours salt spray test exposure.

Good corrosion resistance

HRC54-58

Figure 2 - Relationship between hardness and pitting potential.
Austenitic stainless steel

SUS420J2,SU
AISI420 S440C,AISI440C

Silicollo
y A2、
Silicollo

0
SUS630AISIS1740

SUS304,SUS
AISI304 316L,AISIS316L

Corrosion
ResistanceHigherStrengthHigher
Strength●

Silicolloy A2▲
▲
▲

y XVI

AISI420

Precipitation hardening typeWearResistanceAISI304
HV200HigherHardnessAISI316LHV240

AISI17400
HV480

Martensitic stainless steel

Silicon Alloy=Silicolloy

Marageing steel
HV580

Silicolloy XVI
HV680

High hardness material*imageStrength & Hardness of steel was used to be realized by the feature of "carbon",but "silicon" aﬀects in case of Silicolloy.
For the reason above, silicolloy become dream new materials with multiple
features which couldn't bring about from old idea.
featu

AISI440C
HV710

AISI420
HV620

AISI D2
HV820High speed steel powder

HV1030Cemented carbide
HV1510Figure 3 - After 240 hours salt spray test exposure.

Advantage of Silicolloy

Wear resistance

1.Due to the multiple features, Silicolloy can be used in adverse
environment which regular stainless steeel can't adapt to.

Testing condition
Lubrication condition:Dry
Temperature:room temperature
Sliding time:10min

Pin-on-Disk grinding test

Disc rotation speed:400rpm
Sliding velocity:12.6m/min
Sliding distance:126m

2.'Longer-Lasting' can eﬀect reduction in total cost.
are few dimensions changes,because heat-treatment temperature is low.
3.There aAISI17400

Marageing steel

Material of Pin:AISI440C

Material of DiskSilicolloy A2 and Silicolloy XVI are precipitation hardened stainless steels with high silicon
content,and its higher strength,hardness and wear resistance are superior to AISI17400.
Though its corrosion resistance is inferior to austenitic steels, it's superior tomartensitic andferritic steels and totally greatly balanced steel.
Precipitaion hardened steels are hardened by age hardening after solution treatment, so
rarely have problems both in processing and distortion after heat treatment like quenchingmold.
Especially, Silicolloy XVI achieved the best hardness in the world concerning to theprecipitation hardening.

AISI17400
Material of Disk

Characteristics of Silicolloy

Load:4.9N（500g）

AISI304

AISI440C
Silicolloy XVINitriding

Silicolloy A2

Silicolloy A2
Selective Laser Sintering

Silicolloy A2Material of Pin:AISI440C
Load:9.8N（1000g）

Silicolloy XVI

Silicolloy XVI
0204060

80

100

120

0204060

80

100

Abrasion quantity , ×10-14 m2/N

Abrasion quantity , ×10-14 m2/N

Figure 4 - Pin-on-Disk grinding test1

Figure 5 - Pin-on-Disk grinding test2120