SKD11 steel workpiece stainless steel

Stainless steel alloy has high strength, high ductility, excellent wear resistance, and corrosion resistance, and is easy to weld, machine, and polish. According to their composition, they can be (basically) non-magnetic or magnetic.

There are many kinds of stainless steel. It is called stainless steel because it contains chromium that helps prevent oxidation (rust). Because all stainless steels look the same, it is necessary to use modern measuring equipment (such as an oes tester) to test the incoming raw materials very carefully to confirm the characteristics of the steel used.

Stainless steel 303

In the case of 303, sulfur is also added. This sulfur helps make 303 the easiest stainless steel to process, but it also reduces its corrosion resistance to a certain extent.

303 is not a good choice for cold forming (bending), nor can it be heat treated. The presence of sulfur also means that it is not suitable for welding. It does have excellent machining performance, but you must pay attention to the speed/feed rate and sharpness of the cutting tool.

303 is commonly used for stainless steel nuts and bolts, fittings, shafts, and gears. However, it should not be used for marine-grade accessories.

Stainless steel 304

It is the most common stainless steel alloy with excellent mechanical properties and good machinability. It can resist most environmental conditions and corrosive media.

This is the most common form of stainless steel found in a variety of consumer and industrial products. Usually called 18/8, it refers to the alloy with 18% chromium and 8% nickel added. It is the most common form of stainless steel.

304 is very hard, non-magnetic, easy to process, and usually corrosion resistant, so it is very suitable for kitchen accessories, storage tanks, and pipes used in industry, construction, and automotive industries.

304 is easy to process, but unlike 303, it can be welded. It is also more corrosion resistant in most normal (nonchemical) environments. Machinists, use very sharp knives for processing and do not be contaminated by other metals.

Stainless steel 316

It is another common stainless steel alloy with mechanical properties similar to 304. Generally considered marine grade stainless steel, it is tough and easy to weld. This material is very corrosion-resistant, and for salt solutions (such as seawater), it is very suitable for construction, ship accessories, industrial pipelines, and automotive applications.

Stainless steel 2205

Stainless steel 2205 duplex stainless steel is the strongest stainless steel alloy (twice that of other ordinary stainless steel alloys) and has excellent corrosion resistance. It is used in harsh environments and has many applications in the oil and gas industry.

17-4 stainless steel

The mechanical properties of 17-4 stainless steel (SAE grade 630) are equivalent to those of 304. It can be highly precipitation hardened (compared with tool steel) and has excellent chemical resistance, making it suitable for very high-performance applications, such as the manufacture of turbine blades.

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