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AISI 440C Stainless Steel Balls
  • AISI 440C Stainless Steel Balls
  • AISI 440C Stainless Steel Balls

AISI 440C Stainless Steel Balls

AISI 440C STAINLESS STEEL BALLSMartensitic hardened stainless steel balls, they feature remarkable hardness, wear resist

AISI 440C STAINLESS STEEL BALLS


Martensitic hardened stainless steel balls, they feature 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 condition.

 

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(%)

Type

C

Si

Mn

P

S

Cr

Mo

440C

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

USA

GER

FRA

UK

RUS

CHN

ITA

JAP

440C

1.4125

Z100CD17

-

95X18

9Cr18Mo

X105CrMo17

SUS440C


Physical / mechanical / thermal / electric / magnetic properties

Property

Symbol

U.o.M.

Type

Notes

Value

Density

δ

g/cm3

Physical

Room temp.

7.75

Young's modulus

E

GPa

Mechanical

-

210

Specific heat

c

J/(kg·℃)

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 data

Property

Type

U.o.M.

Value

U.o.M.

Value

Hardness

Mechanical

HRC

57-65

-

-

Ultimate compressive strength

Mechanical

MPa

1900-2000

psi*103

275-290

Service temperature

Thermal

ºC

0-400

ºF

32-752


Range

Diameters

U.o.M.

Diameters

U.o.M.

Precision Grade (ISO 3290)

1.588 - 304.800

mm

1/64 - 12

inch

G40 -......- G2000

 

Corrosion Resistance

The material resists to corrosion in contact with freshwater, steam, oil, petrol, alcohol.

They are subjected to pitting corrosion in sea water environments.

Poor corrosion resistance in acid environments.