stainless Steel Balls in small size with material of SUS304/316/440c
Small Steel Ball (SUS304/316/440c)

Small/miniature steel ball

1) Size: 0.5mm-4mm (according to clients' requirement)

2) Materials: AISI302/316, AISI420/440C, AISI52100

3) Grade: G10-G1000

4) Certificate: ISO-9002, TS-16949

5) Application field: Small balls includes computers, mobile phone lithium battery, REM and mass products like the writing instruments.

The small balls can be further geometrical designed by additional processes. The focus to the micro and nano subject has become much more important in various international development. A positive example is the new process technology for the production of small steel balls.

 

AISI 304 balls are for applications where material toughness and resistance to corrosion are more important than hardness. They have good corrosion resistance to the food environment, oxidizing solutions and most organic chemicals. Applications are valves, aerosol and finger pumps. Corrosion resistance is higher after annealing and passivation. Not resistant to sulphuric acids.

International Equivalents

DIN X5 CR Ni 18.09, AFN Z6 CN 18.09, EN58E, JIS SUS 304 Wks 1.4301

Size Range

0.5mm to 50.8mm

Grade Available

G60/G100/G200/G500/G1000

Hardness

HRC 25-39

Feature

Display good mechanical characteristics, toughness and corrosion resistance. Balls are provided in the passivated state.

Applications

Special bearings and pumps, aerosol pumps, gardening and household sprayers, precompressed perfumery pumps, seams, medical application valves, agricultural backpack sprayers, recirculating balls. They are used in foodstuff, aerospace and military industry.

Material Composition

C   0.08% Max

Cr  18-20%

Ni   8-10%

Si   1.0% Max

Mn  2.0% Max

P   0.045% Max

S   0.03% Max

Mechanical Properties

Tensile Strength- 100,000-180,000psi

Yield Strength- 50,000-150,000psi

Density- 7.91g/cc.

Stainless Steel Ball AISI 316

General Information

Similar to AISI 302/304 but, with the addition of molybdenum improves corrosion resistance particularly to sulphuric acid compounds. These balls are used extensively in applications where contact is made with inks, photographic chemicals, bleaches, dyes and nitric acids. This is the only austenitic steel for ball manufacture and can be non magnetic.

International Equivalents

AFN 26 CND. 17.11, DIN X5 CR Ni Mo 17122, JIS SUS 316, Wks 1.4401

Size Range

0.5mm to 50.8mm

Grade Available

G60/G100/G200/G500/G1000

Hardness

HRC 25-39

Feature

excellent corrosion resistance and resistance to sulphuric acid compounds

Applications

Special bearings, pumps and valves, aerosol and dispenser sprayers. Utilised in the foodstuff, paper, chemical, rubber, military, textile industry. Applications in photographic devices, medical instruments, quick couplings, recirculating balls, ink cartridges, jewels.

Material Composition

C   0.08% Max

Cr  16-18%

Ni   10-14%

Si   1.0% Max

Mo  2-3% Max

Mn  2.0% Max

P   0.045% Max

S   0.03% Max

Mechanical Properties

Tensile Strength- 180,000psi

Yield Strength- 150,000psi

Density- 7.97g/cc.

Stainless Steel Ball AISI 420

General Information

Balls of this material have a lower chrome content than 440C, and are used in application where the more rigid corrosion resistance requirements can be relaxed. They have fair resistance to fresh water, steam, oil gasoline, blood, perspiration, alcohol and food environment. However will not pass 40 hours salt spray test.

International Equivalents

AISI 420, JIS SUS 420, JI X20 CR13, Z40 C13, EN56D, Wks 1.4034

Size Range

0.5mm to 50.8mm

Grade Available

G10/G25/G50/G100/G200/G500/G1000

Hardness

HRC 45-55

Feature

They are characterized by good hardness, corrosion resistance, wear and abrasion resistance.

Applications

Special bearings, anti-friction bearings, special pumps, recirculating balls, lighters, pens.

Material Composition

C   0.15% Max

Cr  12-14%

Si   1.0% Max

Mn  1.0% Max

P   0.04% Max

S   0.03% Max

Mechanical Properties

Tensile Strength- 275,000psi

Density- 7.74g/cc

 

Stainless Steel AISI 440C

General Information

These balls give maximum hardness with good corrosion resistance to fresh water, steam, crude oil, gasoline, alcohol, food environment, blood and perspiration. In addition this material is ferro-magnetic and makes a fair permanent magnet. Balls are deep freeze stabilized after heat treatment.

International Equivalents

AISI 440C, DINX105 CR Mo17, JIS SUS 440C, Z100CD17 Wks 1.4125

Size Range

0.5mm to 50.8mm

Grade Available

G10/G25/G50/G100/G200/G500/G1000

Hardness

HRC 58-62

Feature

Good wear-resisting property and corrosion resistance, with higher hardness than AISI420.

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.

Material Composition

C   0.95-1.20%

Cr  16-18%

Si   1.0% Max

Mn  1.0% Max

P   0.04% Max

S   0.03% Max

Mo  0.75% Max

Mechanical Properties

Tensile Strength- 285,000psi

Yield Strength- 275,000psi

Density- 7.67g/cc