316L is the low carbon version of 316 stainless steel. Covered in thsi document are the physical and mechanical properties of 316L stainless steel. Other areas such as heat treatment, welding, machining, hot and cold working, hardening, work hardening and applications are also outlined.
410 is the basic martensitic grade stainless steel. They are optimised for high hardness, although other properties can be compromised. Corrosion resistance is aided by hardening. Typical applicatiosn include fasteners, bushings, pumps and valves, steam and gas turbine parts and petroleum refineries
321 is similar to 304, but uses titanium as a stabiliser. They differ in that they are resistant to intergranular corrosion after heating to temperatures in the carbide precipitation range. Applications include aircraft exhaust manifolds, furnace parts, heat exchangers, furnace parts etc.
302HQ is a specialised wire grade finding very wide usage for manufacture of stainless steel fasteners. 3% copper in the composition reduces the cold work hardening rate compared to Grade 304. 302HQ is the standard material for self-tapping screws, light machine screws as well as some bolts, etc.
The 316 family is a group of austenitic stainless steels with superior corrosion resistance to 304 stainless steels. They also have excellent toughness and can be used in the food, marine, chemical and architectural fields. Other applications include fasteners and screens for the mining industry.
This article discusses the properties and applications of stainless steel grade 304 (UNS S30400).
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