China Stainless Steel Balls manufacturer

AISI 420C Stainless Steel Balls AISI440C Hardened Magnetic 1/4" 6.35MM G100

Product Details:
Place of Origin: China
Brand Name: JN
Certification: SGS ISO
Model Number: 1/4" 6.35MM
Payment & Shipping Terms:
Minimum Order Quantity: 500kg
Price: Negotiable
Packaging Details: Ploy bag+25kg carton box+1000kg wooden box
Delivery Time: 7-15 days
Payment Terms: T/T, Western Union, MoneyGram,Paypal, L/C, D/A, D/P
Supply Ability: 10 Tons per Month

Detail Information

Product Name: Stainless Steel Balls Grade: G10,G20,G28,G60,G100 G200 G500 G1000
Material Type: SS440 SS420 Stainless Steel Hardness: HRC55-65
Feature: Corrosion Resistance,Anti-rust,Anti-wear,magnetic Color: Silver
High Light:

stainless steel round balls


solid metal ball

Product Description

AISI 420C AISI440C Hardened Stainless Steel Balls



Stainless steel is an alloy of steel which consists of around 89 percent steel, and 11 percent chromium.


The material was developed to handle conventional steel issues with corrosion, and


delivers much greater resistance to both rust and staining.

It is commonly used in manufacturing cutlery, can be used as a large-scale cladding for buildings,


and is often used to make medical tools, where avoiding rust and keeping implements clean is a high priority.

Hardened and Non-Hardened Stainless Steel Balls


Our stainless steel balls come in two varieties: hardened, and non-hardened.


Each variety has its own properties and applications, making it essential to pick the right one for your specific needs.

Hardened stainless steel balls are generally made using Martensitic processes, which adds carbon to the material


and makes it tougher and harder wearing. They are also usually provided in a passivated condition,


which adds an extra micro-coating to make them even more durable.

These hardened balls tend to be used as industrial bearings, in specialist pumps, pens, cigarette lighters,


and other situations where friction is involved.

Non-hardened stainless steel balls tend to be made via Austenitic processes, which add nickel or copper to the material.


These materials are often more workable than hardened versions, but have less corrosion resistance,


and they are commonly found in electronic components.

They also come in Carpenter varieties, with excellent resistance to sulphuric acid,


as well as Nitronic versions that are resistant to magnetization.



Chemical Composition

Material C Si Cr Mn P S Ni
420 0.15 % Max 1% Max 12%~14% 1% Max 0.040% Max 0.03% Max -
430 0.12% Max 1% Max 16%~18% 1% Max 0.040% Max 0.03% Max -
440 0.95%~1.2% 1% Max 16%~18% 1% Max 0.40% Max 0.03% Max -


Mechanical Properties

Material Density Hardness Tensile Strength Magnetic
420 7.75 g/cm³ 48~55 HRC 95,000~250,000 psi Magnetic
430 7.73 g/cm³ 52~60 HRC 107,000~140,000 psi Magnetic
440 7.70 g/cm³ 56~65 HRC 275,000~285,000 psi Magnetic


International Standards


  420C 440C
UK - -
CHN 4Cr13 9Cr18Mo
RUS 40Kh13 95X18
ITA X46Cr13 X105CrMo17
FRA Z34C14 Z100CD17
GER 1.4034 1.4125



420C: Martensitic hardened stainless steel balls, they feature good hardness, corrosion resistance,


wear and abrasion resistance. Balls are provided in the passivated condition.

440C: Martensitic hardened stainless steel balls, they feature remarkable hardness, wear resistance, surface finishing,


narrow dimensional tolerances. For that reason this type of steel is frequently used in precision devices.


Balls are provided in the passivated condition.

Corrosion Resistance


420C: Good corrosion resistance in industrial atmosphere, freshwater, steam, alcool, ammonium,


several oilfield products and organic compounds, dairy products, mild acid environments.


Fairish in foodstuff and alkaline solutions. Fair in salt atmosphere.


It does not resist in contact with sea water and strong acids (even if diluted).

440C: The material resists to corrosion in contact with freshwater, steam, oil, petrol, alcohol.


They are subjected to pitting corrosion in sea water environments. Poor corrosion resistance in acid environments.



420C: Special bearings, anti-friction bearings, special pumps, recirculating balls, lighters, pens, automotive seatbelts & components.

440C: 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.





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