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BOYA INDUSTRIES / PRECISION & SUPPLY

Precision Steel Balls

Compare chrome, carbon and stainless steel balls by material, grade and diameter. BOYA focuses on G10 chrome steel balls, with G5 available on request.

01 / PRODUCT FAMILY

Precision Steel Balls

Chrome steel at the core. Carbon and stainless steel options for your assembly.

Compare steel ball materials

Confirm specific diameter, grade and treatment combinations with your quotation.

Precision steel ball families at a glance
MaterialPrecision & diameterNext step
Chrome Steel BallsAISI 52100 / GCr15 / 100Cr6G10 (primary) / G5 (on request)0.50–82.55 mmG10 sizesG5 details
Carbon Steel BallsAISI 1010 / 1015; AISI 1085G100–G10000.5–50 mmSpecifications
Stainless Steel Balls400 series: AISI 420A / 420B / 420C / 440C; 300 series: AISI 302 / 304 / 304L / 316 / 316LG10–G10000.5–150 mmSpecifications
Compare grades, finish and typical applications
Comparison of steel ball material families
Material familyListed designationsFamily size & grade rangeHardening, finish & magnetismTypical selection focusProduct page
Chrome steel ballsAISI 52100 / GCr15 / 100Cr60.50–82.55 mm; G10 primary, G5 on request (featured: 5/32″, 3/16″, 1/4″)Through-hardened high-carbon chromium bearing steel; magnetic; not a corrosion-resistant stainless alloyPrecision bearings, motors, linear motion and demanding rolling-contact assembliesView product →
Carbon steel ballsLow carbon: AISI 1010 / 1015; high carbon: AISI 1085Series range: 0.5–50 mm, G100–G1000 (confirm specific combination)Magnetic; soft/unhardened, carburized/case-hardened (low carbon) or through-hardened (1085); polishing or Cu/Zn/Ni plating optionsCasters, drawer slides, ball transfer units, bicycles, welding and general hardwareView product →
Hardenable stainless steel balls (400 series)AISI 420A / 420B / 420C / 440CWithin the stainless series range of 0.5–150 mm, G10–G1000 (confirm per alloy)Martensitic grades; heat-hardenable for wear resistance; normally magnetic; polishing, heat treatment and passivation optionsValves, pumps, bearings and mechanical components requiring hardness plus corrosion assessmentView product →
Austenitic stainless steel balls (300 series)AISI 302 / 304 / 304L / 316 / 316LWithin the stainless series range of 0.5–150 mm, G10–G1000 (confirm per alloy)Not hardenable by conventional quenching; low magnetism when annealed (cold work can increase magnetism); polishing and passivation optionsFluid handling, sprayers, chemical, marine and hygienic equipment after medium and compliance reviewView product →
Chrome Steel Balls

Chrome Steel Balls

AISI 52100 chrome steel balls are precision bearing balls made from high-carbon chromium bearing steel. BOYA supplies G10 precision chrome steel balls, with G5 available on request through our manufacturing partners.

Material designation
AISI 52100 / GCr15 / 100Cr6
Precision grade
G10 (primary) / G5 (on request)
Diameter range
0.50–82.55 mm
Featured sizes
5/32″ · 3/16″ · 1/4″

These are our three featured sizes. Other diameters within 0.50–82.55 mm can be custom ordered.

Carbon Steel Balls

Carbon Steel Balls

Low and high carbon steel balls for mechanical components, with polishing, heat-treatment and plating options.

Material designations
Low carbon: AISI 1010 / 1015; high carbon: AISI 1085
Diameter range
0.5–50 mm
Precision grades
G100–G1000

Provide material, diameter, grade and quantity for a specification-based quotation.

Stainless Steel Balls

Stainless Steel Balls

420, 440C, 304 and 316 stainless steel balls for mechanical and fluid applications. Select the material, heat-treatment condition and inspection requirements for your order.

Material designations
420A / 420B / 420C / 440C; 302 / 304 / 304L / 316 / 316L
Diameter range
0.5–150 mm
Precision grades
G10–G1000

Provide material, diameter, grade and quantity for a specification-based quotation.

A drawing outside the catalogue?

Send your material, dimensions, quantity and intended use for a production quotation.

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Material. Diameter. Grade. Quantity. Send your requirements and let’s review the supply options.

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