Applicable Industries:: Hotels, Garment Shops, Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Farms, Restaurant, Home Use, Retail, Food Shop, Printing Shops, Construction works , Energy & Mining, Food & Beverage Shops, Advertising Company

Place of Origin:: Shandong, China

Brand Name:: PT balls

Model Number:: 304/316/420/440C

Material:: Stainless Steel

Name:: Factory 20mm Rubber coated steel balls for bearing

Grade:: G200

Size:: 0.5-220mm

Surface:: mirror polished

Certifications:: ISO

Hardness:: HRC26,58,60

MOQ:: 1000 pieces

Application:: bearing,valve,nail polish, grinding,ball transfer , nurse

OEM:: yes

Manufacture:: yes

Supply Ability

Supply Ability:: 100 Ton/Tons per Month

Packaging & Delivery

Welcome agents to negotiate prices with us!

Product Description

Steel marbles balls 4mm steel balls for bearing

Stainless steel balls are usually produced by the stainless steel forging process. At this stage, the commonly used stainless steel balls are made of 201, 302, 304, 316, 316L, 420, and 440C.

Steel that contains more than 12.5% chromium and has high resistance to corrosion by chemical substances (acid, alkali, salt). Principle: The principle is that by the addition of chromium elements, a dense chromium oxide layer is formed on the surface of the steel, which can effectively block the re-contact of the steel and the air, so that the oxygen in the air cannot enter the steel, thereby preventing the production of the steel.

steel marbles balls 4mm steel balls for bearing from China supplier

304 Stainless steel ball

Grade:G100-G1000

Density:7.85g/cm3

Features:Austenitic steel, hardness≤26 degrees, non-magnetic, strong rust resistance and good corrosion resistance.

Application:Valves, perfume bottles, medical equipment, nail polish, baby bottles, cosmetic packaging, air conditioners and other household appliances.

316 Stainless steel ball

Grade:G100-G1000

Density:7.98g/cm3

Hardness≤26

Features:Austenitic steel, used in industries with high anti-corrosion requirements, non-magnetic, and strong rust resistance.

Application:Valves, perfume bottles, medical equipment, nail polish, baby bottles, cosmetic packaging, air conditioners and other household appliances.

201 Stainless steel ball

Grade:G100-G1000

Features:Austenitic steel, hardness 26 degrees, non-magnetic after demagnetization, will not rust when placed in water.

Application:Hardware accessories, household appliances, lamps, switches, die-casting parts, plastic products, etc.

420 Stainless steel ball

Grade:G10-G1000

Denstiy:7.75g/cm3

Features:Martensitic steel, commonly known as stainless iron, has a hardness of 50-55 degrees, is magnetic, has good corrosion resistance and toughness.

Applition:All kinds of precision machinery, bearings, electrical equipment, household appliances, auto parts, etc.

440C Stainless steel ball

Grade:G10-G1000

Density:7.75g/cm3

Features:Martensitic steel has high precision, with a hardness of 58-60 degrees. It is magnetic, has good corrosion resistance, and has strong rust resistance and wear resistance.

Application:Bearings, stamping/ hydraulic parts, valves, aerospace, seals, refrigeration equipment, high-precision instruments, etc.

Steel ball composition table

Manufacturing Process of Steel Balls

Application

Specification

item	value
Application	Valves, perfume bottles, medical equipment, nail polish
Steel Grade	201/304/304L/316/316L/420/440C
Surface Finish	Mirror polish
Invoicing	by actual weight
Delivery Time	within 7 days
Material	304/316/420/440 Stainless Steel
Product name	Stainless Steel Ball
Brand Name	PT balls
Standard	AISI
Size range	1mm-100mm
Place of Origin	Shandong,China
Grade	G10-1000
Hardness	HRC≤26;50-55;58-60
MOQ	100 Pieces

Packing & Delivery

Plastic bag+ cardon box+ wooden pallet. Plastic bag+ Iron drums+wooden pallet.

Company Profile

ShanDong PT International Trade Co.,Ltd. is one of famous balls factory from china . We have two factories, one is in Ningyang, Shandong province , another is located in Kaifeng city,Henan province, which mainly produces precision balls in different materials, With over 20 years history,our factory have good reputation from our customers and government. Mainly produce stainless steel ball (201, 304, 316,420,420C,440C,430), chrome steel ball (AISI52100,100CR6,GCR15), carbon steel ball (1015,1010,1045,1085), copper/brass balls, high precision plastic ball(material of POM,PP,PA66 ), glass balls (material of Soda-Lime and Borosilicate), Tungsten carbide ball, flying saucer ball, polishing media ball, ceramic ball, Aluminum ball and other kinds of material ball. Our delivery time:It is 3-5 days if the goods are in stock.or it is 5-25 days if the goods are not in stock,it is according to the quantity.

We stick to the management policy of “Trust and Quality First,Customer supreme” .

Welcome to visit us and send inquiry to us!

Why Choose Us

1.PT Balls are Professional manufacturer with independent export right. 2.Special types of balls supplied. PT Balls offer the complete size, our flying saucer steel ball and other grinding media can meet the needs of various industries. 3.Small quantity of free samples could be provided. 4.Small MOQ with competitive price. 5.Fast delivery based on quality guaranteed. 6.All inquiries and messages will be replied in 24 hours.

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