4.5MM Stainless Steel Balls 440C Bearing Balls For Nail Polished G10 7/64" 2.778 MM
Brand Name:JN
Certification:SGS ISO
Model Number:7/64" 2.778 MM 4.5MM
Minimum Order Quantity:500kg
Delivery Time:7-15 days
Payment Terms:T/T, Western Union, MoneyGram,Paypal, L/C, D/A, D/P
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Jinan Shandong China
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XUESHAN ROAD,LICHENG DISTRICT ,JINAN CITY ,SHANDONG ,CHINA
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Product Details
4.5MM Stainless Steel 440C Bearing Balls For Nail Polished G10 7/64" 2.778 MM
440 Stainless Steel balls are a martenistic-type stainless steel which is used
extensively in steel ball bearing applications that require hardness, dimensional stability,
corrosion resistance and toughness. 440 Stainless Steel is also used for corrosion-resistant ball
and check valves. 440 ball are resistant to corrosion from fresh water, steam, crude oil, gasoline,
perspiration, alcohol, blood and food stuffs. Maximum resistance to corrosion and
tarnishing is only achieved when 440 is fully hardened and surfaces are polished to a high luster.
440 is also magnetic.
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 |
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. |
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. | 7.70 |
Young's modulus | E | [GPa] | Mechanical | - | 210 |
Specific heat | c | [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 | Not hardened | > 700 |
Technical data
Property | Type | U.o.M. | Values | U.o.M. | Values |
|---|---|---|---|---|---|
Hardness | Mechanical | [HRC] | 57 - 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, alcohol. They are subjected to pitting
corrosion in sea water environments. Poor corrosion resistance in
acid environments. |
Range
Diameters (min/max) | U.o.M. | Diameters (min/max) | U.o.M. | Precision grades (ISO 3290-1 / DIN 5401 / AFBMA) |
|---|---|---|---|---|
0.300 - 300.000 | [mm] | 1/64 - 12 | ["] | See section International Standards: ISO 3290-1 / DIN 5401 / AFBMA |
4.5MM Stainless Steel Balls 440C Bearing Balls For Nail Polished G10 7/64" 2.778 MM
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