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Industrial Equipment

June 16, 2022
Latest company case about Industrial Equipment

Stainless steel is an alloy of iron that is resistant to rusting and corrosion. It contains at least 11% chromium and may contain elements such as carbon and other nonmetals to obtain other desired properties. Stainless steel's resistance to corrosion results from the chromium, which forms a passive film that can protect the material and self-heal in the presence of oxygen.

The alloy's properties, such as luster and resistance to corrosion, are useful in many applications. Stainless steel can be rolled into sheets, plates, bars, wire, and tubing. These can be used in cookware, cutlery, surgical instruments, major appliances, vehicles, construction material in large buildings, industrial equipment (e.g., in paper mills, chemical plants, water treatment), and storage tanks and tankers for chemicals and food products.

The biological cleanability of stainless steel is superior to both aluminium and copper, and comparable to glass. Its cleanability, strength, and corrosion resistance have prompted the use of stainless steel in pharmaceutical and food processing plants.

Different types of stainless steel are labeled with an AISI three-digit number.The ISO 15510 standard lists the chemical compositions of stainless steels of the specifications in existing ISO, ASTM, EN, JIS, and GB standards in a useful interchange table.


Stainless steel is a highly durable metal known for its impressive hardness. This quality is primarily due to the presence of two key components: chromium and nickel. Chromium forms an oxide layer on the metal's surface, protecting it from corrosion and wear. Meanwhile, nickel contributes to the metal's strength and ductility, enhancing its overall hardness. Stainless steel can also be hardened through heat treatment processes such as annealing or quenching, further improving its hardness.

Thermal Conduction

The thermal conductivity of stainless steel depends on its composition and structure. Typically, stainless steel has a thermal conductivity ranging from 15 to 20 W/mK (watts per meter Kelvin). Due to this, it keeps more energy that stabilizes the surrounding temperature.


The density of stainless steel can be somewhere between 7,500kg/m3 to 8,000kg/m3 depending on the alloy.

Stainless Steel (ASTM) Density (kg/m3)
304, 304L, 304N 7930
316, 316L, 316N 8000
201 7800
202 7800
205 7800
301 7930
302, 302B, 302Cu 7930
303 7930
305 8000
308 8000
309 7930
310 7930
314 7720
317, 317L 8000
321 7930
329 7800
330 8000
347 8000
384 8000
403 7700
405 7700
409 7800
410 7700
414 7800
416 7700
420 7700
422 7800
429 7800
430, 430F 7700
431 7700
434 7800
436 7800
439 7700
440 (440A, 440B, 440C) 7700
444 7800
446 7600
501 7700
502 7800
904L 7900
2205 7830
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