HARDENED HIGH-CARBON MARTENSITIC STAINLESS

AISI 420C Stainless Steel Balls

Hardened stainless steel balls for valves, bearings, pumps and precision mechanisms requiring wear resistance with practical corrosion performance.

Request a Quote ↗Contact SDBALLS U.S.

AISI 420C Stainless Steel Balls supplied by SDBALLS — PRODUCT REFERENCE / FINAL SPECIFICATION BY QUOTATION

PRODUCT OVERVIEW

What are aisi 420c stainless steel balls?

AISI 420C balls are high-carbon martensitic stainless steel spheres that are hardened, ground and polished for applications requiring stronger wear resistance than lower-carbon 420 grades.

The material provides a useful middle position between economical 420A/420B and high-hardness 440C. It remains a martensitic stainless alloy, so aggressive chloride and chemical exposure must be reviewed separately.

TECHNICAL SPECIFICATIONS

Start with measurable requirements.

Values below are product-family references. The quotation, drawing, agreed standard and inspection plan control the final supply specification.

Technical itemReference specification

MaterialAISI 420C / equivalent grade by agreed material standard

Diameter Range0.5–150 mm typical; other sizes by production review

Precision GradeG10–G1000 depending on diameter and requirement

ToleranceControlled by the agreed precision grade, drawing or purchase specification

HardnessHRC 52–58 typical

DensityApprox. 7.7 g/cm³

Surface FinishGround, lapped, polished and optionally passivated

Roundness / SphericityControlled according to the agreed precision grade and inspection method

Temperature ResistanceApplication, load, atmosphere and material-grade dependent

Chemical ResistanceModerate stainless performance; medium-specific review required

PackagingBulk, small-quantity, container, bag, carton, export pallet or customized packing

MagnetismMagnetic

PRODUCT SELECTION GUIDANCE

Compare materials before substituting.

Material selection affects load, wear, corrosion, temperature, precision, service life and total program cost.

Material optionPrimary advantageLimitationBest fit

420C stainlessStrong hardness-to-cost balanceModerate corrosion resistanceValves, pumps, bearings and mechanisms

420A/420B stainlessLower cost and adequate general hardnessLower wear resistanceGeneral industrial and consumer mechanisms

440C stainlessHigher hardness and dimensional stabilityHigher costPrecision bearings and severe wear

316/316L stainlessSuperior marine and chemical corrosion resistanceMuch softerChemical, marine and hygienic flow control

KEY PERFORMANCE FEATURES

Performance that purchasing teams can verify.

High wear resistance

Hardened martensitic structure supports repetitive contact and seating cycles.

Controlled precision

Grinding, lapping and sorting support application-specific grade and surface requirements.

Moderate stainless protection

Useful in mild wet service when the actual fluid and cleaning method are compatible.

Magnetic process handling

Compatible with many automated feeding, sorting and assembly operations.

TYPICAL APPLICATIONS

Specify the work the ball must perform.

Application names are starting points—not approval of universal suitability. Share the real medium, load, speed, pressure, temperature, life target and compliance needs.

Valves & pumps

Seating, checking and control components for compatible media, pressures and temperatures.

Special bearings

Moderate stainless rolling applications requiring hardness and controlled geometry.

Precision hardware

Quick couplings, detents, locks and mechanical assemblies.

Instruments & consumer mechanisms

Smooth finished balls for repetitive movement and contact.

Typical applications for AISI 420C Stainless Steel Balls — REPRESENTATIVE APPLICATION ENVIRONMENTS

QUALITY & DOCUMENTATION

Build the evidence into the purchase order.

Document requirements should be defined before quotation so the inspection method, sampling level, traceability and external testing can be planned correctly.

Material verification against the agreed steel grade and purchase specification
Diameter, tolerance and precision-grade inspection using calibrated equipment
Hardness and heat-treatment verification when applicable
Surface finish and visual-defect inspection to the agreed acceptance criteria
Roundness / sphericity and lot-consistency inspection for the specified precision level
Batch traceability through heat, lot and controlled production records
Material certificates and inspection reports available when agreed before quotation
RoHS, REACH, PPAP-style records and third-party testing by project agreement

PACKAGING OPTIONS

Protect precision through delivery.

Final packing depends on material, diameter, surface sensitivity, order weight, storage time and destination.

Small-quantity packing

Size-separated bags, bottles, trays or protected containers for samples, repair and qualification lots.

Bulk industrial packing

Inner bags, cartons, pails or steel drums selected around diameter, total weight and handling method.

Surface protection

Clean/dry, passivated, lightly oiled or rust-preventive packing according to alloy and storage risk.

OEM & export packing

Customer labels, counted packs, batch separation, export pallets and line-ready packaging by agreement.

Supported formats: bulk packaging · small-quantity packaging · plastic containers · bags · cartons · export pallets · customized packaging.

SMALL QUANTITY & SAMPLE ORDERS

Validate before you scale.

SDBALLS Industry Corp. supports North American customers with sample quantities, prototype requirements, testing programs and specialty ball inquiries.

Provide diameter, grade, hardness, medium, pressure, surface finish and inspection plan for focused 420C sample selection.

PrototypeTestingRepairR&DSmall batch production

Request Samples ↗Contact U.S. Support

PRODUCT FAQ

Answers for engineering and purchasing teams.

What sizes are available?

The typical range is 0.5–150 mm. Size, grade and heat-treatment availability must be confirmed together.

What precision grades can be supplied?

Common supply spans G10–G1000, subject to diameter, lot size, hardness and surface requirements.

How corrosion resistant is this material?

420C has practical corrosion resistance in mild environments but is not equivalent to 304 or 316 in chloride-rich, marine or aggressive chemical service.

Are these steel balls magnetic?

Yes. Hardened 420C stainless steel is magnetic.

Can SDBALLS provide material certificates and inspection reports?

Yes. Define the required material certificate, dimensional report, hardness report, compliance record, PPAP-style documentation or third-party test before quotation so the correct inspection plan can be priced.

Do you support samples and small-quantity orders?

Yes. SDBALLS Industry Corp. supports North American buyers with samples, prototype quantities, repair lots and small-batch programs where the requested size, grade and material condition are available.

CONTACT SDBALLS U.S.

Bring us the application and requirement.

Include product, material, size or shot size, grade, hardness, finish, quantity, packaging, application and required documentation for a faster quotation.

SDBALLS Industry Corp.Email: info@sdballs.usWhatsApp: +1 424 351 5470Website: www.sdballs.usNorth American Business Support