Stainless Steel Ball Factory offers rust-resistant, high-hardness, wear-resistant 201 stainless steel beads in sizes ranging from 0.3mm to 60mm.

Application Fields201 stainless steel balls are widely used in various hardware industries, crafts, plastic products, such as lighting fixtures, switches, motorcycle accessories, bags, bearings, and die castings.

FeaturesNickel-saving steel grade, Austenitic type, non-magnetic, with low price and excellent performance. Can be machined, welded, and drilled, hardness HRC≤28. The 201 stainless steel ball is not suitable for industries with high requirements for rust and corrosion resistance, such as seawater or acidic substances.

Magnetic 
All Austenitic stainless steel balls are typically non-magnetic; after cold working, some magnetism may be noticeable. Standard:ISO3506 GB/T 
Characteristics of various materials' magnetic permeability, also applicable to stainless steel. Only in a vacuum state can it be completely non-magnetic. Materials in a magnetic fieldThe measurement of the permeability is relative to the material's permeability in a vacuum.μr stands for relative permeability. If μr is close to 1, the material has a low permeability.

In everyday life, we often encounterUsing a magnet to determine if a material is stainless steel is actually a very incorrect method of judgment.。

Stainless steel is categorized intoAustenitic stainless steel and Martensitic stainless steel, wherein201, 304, 316, and 316L are Austenitic stainless steels without magnetic properties; whereas 420, 430, 440, and 440C represent Martensitic stainless steels, commonly known as "rustproof iron" in our country. The reason for the name is due to their magnetic nature. However, not all magnetic corrosion resistance is poor, let alone that magnetic is the same as iron. Among them, 440 and 440C are top-performers in stainless steels, referred to as special steel. They offer excellent corrosion resistance and high hardness, making them known as stainless steel bearing steels and are widely used in high-precision manufacturing industries.

Therefore, we cannot simply judge whether it is stainless steel based on whether a magnet sticks or not. So 440 Stainless Steel BallOf course, it's made of stainless steel, and it's high-quality stainless steel, too.

Your concerns and questions, we address one by one here:

How to select steel balls?

(1). If you're looking for high hardness and wear resistance, opt for the bearing steel ball with wear resistance, followed by the carbon steel ball after heat treatment.

(2). If you require welding a low-hardness steel, it should be carbon steel balls without heating, commonly known as iron balls.

(3). For superior rust prevention, opt for stainless steel balls, available in grades 304, 316, and 316L, with increasing rust prevention effectiveness.

(4). For excellent rust prevention and high hardness, opt for 440 stainless steel balls.

(5). For high precision, choose a higher grade. The smaller the number, the higher the grade, and the better the precision.

 If the above does not resolve your doubts or you're still unsure about the type of steel ball you need, please contact our customer service and clearly explain your application. Our professional staff will provide you with a specialized solution to ensure your satisfaction!

2. Quality Assurance

(1). Raw Material Assurance: sourcing steel billets directly from major steel mills.

(2). Production Equipment Assurance: Introduction of production equipment and testing instruments.

(3). Technical Staff Support: Over a decade of technical staff operate around the clock, rotating shifts to ensure production control.

(4). Strict and rigorous production management system: Strictly manage, adhere to production regulations, and ensure traceability through reverse responsibility.

(5). A sealed and tidy clean room: Ensures high precision production of precision steel balls.

3. Shipping Information

（1). Samples via SF Express: A limited number of samples are available free of charge, with shipping fees to be paid by the recipient.

(2) Shipments under 300 kg are handled via Yousu Express, Best Express, Deppon Logistics, Jiayi Logistics, Shangqiao Logistics, and others.

(3). Shipping over 300 kg via dedicated logistics; generally, pick up at city logistics; if pick-up at the county/district is required, please specify; additional delivery fee applies for delivery service.

4. Packaging

We offer a variety of packaging options, including woven bags, cardboard boxes, pallets, steel drums, bottled, and ton bags, and can customize packaging to meet customer requirements.

5. Where is the shipment from?

Due to our factory being located in a rural area, logistics and express delivery are not convenient. Therefore, we lease a large warehouse in a large logistics park in Liaocheng City to store goods and ship them to our customers.

6. Returns & Exchanges

If it's our responsibility, and the quality does not meet the standard, we will cover the round-trip shipping costs for returns and exchanges. If it's the buyer's responsibility, returns and exchanges are possible as long as they do not affect resale, with the buyer covering the shipping costs both ways.