Stainless Steel Ball

SUS440C Stainless steel ball 1.The introduction of SUS440C Stainless steel ball This kind of magnetic material offers the advantage of higher of through hardness than other stainless steel materials, as well as a considerable resistance to corrosion against water, steam, oil, gasoline(petrol)...

Description

SUS440C Stainless steel ball

1.The introduction of SUS440C Stainless steel ball

This kind of magnetic material offers the advantage of higher of through hardness than other stainless steel materials, as well as a considerable resistance to corrosion against water, steam, oil, gasoline(petrol) and alcohol.

The high hardness, grade of surface finish, and extremely accurate tolerances ensure that this type of steel is suitable material to stainless steel precision ball bearings, oil refinery valves, ball-point pens and other rigid environmental applications.

Diameters of SUS440C Stainless steel ball: from 2mm to 40mm

Precision grade of SUS440C Stainless steel ball: ISO 3290 G3-5-10-16-20-28-40-100-200-AFBMA G500/G1000

Equivalent materials to international standards: AISI 440-C-W1.4125-AFN Z100CD17-DIN X105CrMo17-JIS SUS440C

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2.The detail of SUS440C Stainless steel ball

    Material   Specification

C

Cr

Mn

Si

P

S

Mo


0.95-1.20%



16-18%


1.0%Max


1.0%Max



0.04%Max



0.03%Max


0.75%Max


Mechancial

Properties

Tensile Strength

285,000 psi

Yield Strength


275,000 psi

Density


0.277 Ibs/cu in


Physical

Property

Corrosion resistance

Fair

Magnetic


Yes


Size Range

0.8mm  ( 1/32" )    to    63.5mm   ( 2-1/2" )

Hardness

 HRC  ≥ 58

Grade

 G10  -  G1000


Application

Type 440C balls are used in bearings , valves , locking mechanisms , fasteners and quick-disconnect couplings . 


Material

Conversion

ASTM / AISI

YB

JIS



440C



9Cr18Mo


SUS440C


3.Production Line Process of SUS440C Stainless steel ball

Heading: 

  In the first step, heading machines cut wire into short lengths and form it into spherical shapes between dies.

Deflashing:

  The flash line, a ridge left by the forming dies, is removed as balls roll between heavy,cast iron plates.

Soft Grinding:

  Similar to deflashing, except that a grinding stone is used to improve precision.

Heat-treating: 

  Carbon steel balls are next carburized and hardened. Heat treatment imparts the desired hardness and case depth.

Descaling: 

  This step removes the residues and by-products from the heat-treating process.

Hard Grinding: 

  Slow, meticulous grinding assures proper sizing and sphericity, with tolerances as closeas ±.0001".

Lapping: 

  Several proprietary lapping processes can bring balls to the requirements of ISO 3290 Grade10 - 48. 

Finishing: 

  Proprietary chemical and mechanical processes give the balls their final micro-smoothed finish, for increased wear resistance and product longevity.

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4.Quality test of SUS440C Stainless steel ball

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Luoyang Yusion Industrial Co.,Ltd.
Tel: +86-379-61110176
Fax: +86-379-61110176
E-mail: sales@yusioncn.com
Add: 106 Building 1st, Asia Show Lido, Wangcheng Avenue 178, Xigong District, Luoyang, Henan, China