H.R.T. Precision Steel Ball Co., Ltd
Free Member
0.5mm-50.8mm AISI 440C STAINLESS STEEL BALLS

0.5mm-50.8mm AISI 440C STAINLESS STEEL BALLS

Min. Order:
1 Piece
Payment term:
TT, WESTERN UNION
Delivery time:
in 30 days
Technical Parameters:
Product Designations:
AISI 440C
Structure:
0.5mm-50.8mm
Inside Diameter:
0.5 mm
Outside Diameter:
1.8 mm
Thickness:
50.8 mm
Weight:
TBD KG
Brand:
HRT
Precision Rating:
G5-G1000
Bearing Material:
ss440c stainless steel
Seals Type:
non heat treatment
0.5mm-50.8mm AISI 440C STAINLESS STEEL BALLS

AISI 440C STAINLESS STEEL BALLS

Size: 0.5mm-50.8mm

Grade: G5 to G1000


Martensitic stainless steel balls, they are characterized by remarkable hardness, wear resistance, surface finishing, narrow dimensional tolerances. For that reason this type of steel is frequently used in precision devices. Balls are provided in the passivated state.


Applications

Precision bearings, anti-friction bearings, special valves, conveyor belts and rollers, ballpoint pens. They are used in foodstuff, medical instruments, quick couplings, recirculating ball bearings, knotting devices, oil refinery devices. 


 

Chemical composition (%)

%C

%Si

%Mn

%P

%S

%Cr

%Mo

0.95-1.20 

1.00 max 

1.00 max 

0.040 max 

0.030 max 

16.00-18.00 

0.75 max 


 

International standards

ITA

USA

GER

FRA

UK

RUS

CHN

JAP

X 105CrMo17 

440C 

1.4125 

Z100CD17 

95X18 

9Cr18Mo 

SUS440C 


 

Physical / mechanical / thermal / electric / magnetic properties

Property

Symbol

U.o.M.

Type

Notes

Values

Density 

δ 

[g/cm3] 

Physical 

Room temp. 

7.75 

Young's modulus 

[GPa] 

Mechanical 

210 

Specific heat 

[J/kg-K] 

Thermal 

Room temp. 

450 

Coefficient of linear thermal expansion 

α 

[10^-6/ºC] 

Thermal 

(ΔT=0-100°C) 

10.2 

Thermal conductivity 

λ 

[W/(m·K)] 

Thermal 

Room temp. 

19.6 

Electric resistivity 

ρ 

[Ω*m*10^-9] 

Electric 

680 

Relative magnetic permeability 

µ 

Magnetic 

Ferromagnetic 

> 700 


 

Technical characteristics of balls

Property

Type

U.o.M.

Values

U.o.M.

Values

Hardness 

Mechanical 

[HRC] 

58 - 65 

Ultimate tensile strength 

Mechanical 

[MPa] 

1900 - 2000 

[psix10^3] 

275 - 290 

Service temperature 

Thermal 

[ºC] 

0 - 400 

[ºF] 

32 - 752 


Corrosion Resistance

The material resists to corrosion in contact with freshwater, steam, oil, petrol, alcool. They are subjected to pitting corrosion in sea water environments. Poor corrosion resistance in acid environments. 


 


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