9.9mm 0.390inch AISI304 Stainless Steel Balls for Computer Mouse 3.968g

Production Description

They exhibit excellent mechanical attributes, toughness and corrosion resistance. AISI 304L supplies lower carbon articles, AISI 302 far better mechanical attributes. Balls are offered in the passivated condition.


Stainless steel balls are broadly used in bearings, cars, bikes, bicycles, house appliances, chemical machinery, textile machinery, foodstuff equipment, mining equipment, instruments, and other fields.

Chemical composition 

Variety %C %Si %Mn %P %S %Cr %Ni %N
302 .one hundred fifty max one.00 max two.00 max .045 max .030 max 17.00-19.00 8.00-10.00 .100 max
304 .080 max .seventy five max 2.00 max .045 max .030 max eighteen.00-twenty.00 eight.00-10.fifty .one hundred max
304L .030 max .75 max two.00 max .045 max .030 max 18.00-20.00 eight.00-10.50 .100 max

CZPT standards 

ITA United states of america GER FRA British isles RUS CHN JAP
X10CrNi18-eight 302 one.4310 Z11CN18-08 301S21 12KH18N9 1Cr18Ni9 SUS301
X5CrNi18-10 304 1.4301 Z7CN18-09 304S15 08KH18N10 0Cr18Ni9 SUS304
X2CrNi18-9 304L one.4307 Z3CN18-10 304S11 04KH18N10 00Cr19Ni10 SUS304L

Actual physical / mechanical / thermal / electric powered / magnetic properties 

Residence Symbol U.o.M. Kind Notes Values
Density δ [g/cm3] Physical Place temp. 7.95
Young’s modulus E [GPa] Mechanical 200
Certain heat c [J/kg-K] Thermal Room temp. 500
Coefficient of linear thermal expansion α [10^-6/ºC] Thermal (ΔT=-100°C) 17.five
Thermal conductivity λ [W/(m·K)] Thermal Room temp. fifteen.eight
CZPT resistivity ρ [Ω*m*10^-9] CZPT 710
Relative magnetic permeability µ Magnetic Paramagnetic one.571*

CZPT data 

Home Type U.o.M. Values U.o.M. Values
Hardness Mechanical [HRC] twenty – 39 (one)* [HV] a hundred – 250 (two)*
Supreme tensile energy Mechanical [MPa] five hundred – 1300 [psix10^3] seventy two – 188
Services temperature Thermal [ºC] -196 / 700 [ºF] -320.8 / 1697

Corrosion Resistance 
Extremely good corrosion resistance with respect to organic and natural substances, oxidating remedies, foodstuff, sterilizing solutions. Good resistance with regard to atmospheric corrosion and dyes. They are subjected to pitting and crevice corrosion in presence of scorching chloride options and to stress corrosion when temperature exceeds 60°C. They do not resist to sulfuric acid remedies. AISI 302 demonstrates a bit ideal corrosion resistance with respect to AISI 304/304L stainless steels.


Property  Description
Hardness* Balls can be equipped in the (one) Chilly Worked (HRC twenty-39, common product) or (two) ANNEALED (HV one hundred-250, on demand from customers) problems.
Magnetism Eventual magnetism of AISI 316 balls and in standard of all austenitc stainless steels strictly is dependent by the producing method, certain inquiries for not magnetic balls should priorly described.
Precision Grade** On specifical ask for and for huge portions, we can source G10 and G16 precision quality balls. Diameters from 3.000 mm to 1/two”.
Precision Quality** On specifical request we can provide G20-24-twenty five-28-40-48-fifty-60-80 precision grade balls.

Other Items

Packing&Shipping and delivery

Manufacturing Approach

Organization Information

ZheJiang Jinnai CZPT Trade Co.,Ltd. is 1 of the specialist manufactures which focus in the metal ball,like carbon

metal balls,stainless steel balls ,bearing chrome steel balls ,hollow steel balls ,iron balls ,magnetic buckyballs ,ball associated items

this kind of as ball cage or ball retainers, silicone balls ,plastic balls .ect…



Q:Do you give samples before get? is it free of charge or further ?
A: Of course, we could provide the sample ,But extra.or we can go over
Q:Can you do CZPT design and style ?
A: Sure,we can do customizes design and style,you just give us your style,image,layout,size and your necessary.
Q:What is your terms of payment ?
A: Payment: 30% T/T in progress ,stability ahead of cargo.

9.9mm 0.390inch AISI304 Stainless Steel Balls for Computer Mouse 3.968g