Differences in Stainless Steel Alloys

Posted by TheCornerGuardStore on 20th Jul 2021


The Corner Guard Store is a wall protection warehouse where you can buy corner guards made of materials such as aluminum, stainless steel, brass, plastic, foam rubber, and rubber. We provide ideal impact protection for all your wall corners as well as for high traffic areas. You can coordinate your corner guards to match your interior, or use them as a design element. Here, we will discuss stainless steel and its different alloys.


Stainless Steel 3-Sided Corner Guard

 Stainless Steel 3-Sided Corner Guard

Stainless steel is a group of iron alloys that contain a minimum of approximately 11% chromium, a composition that prevents the iron from rusting and also provides heat resistant properties. Different types of stainless steel include the elements carbon, nitrogen, aluminum, silicon, sulfur, titanium, nickel, copper, selenium, and molybdenum. Specific types of stainless steel are often designated by their AISI (American Iron and Steel Institute) three digit number, such as stainless steel 304, 316, 430, and 410.



Stainless steel grade 430 is a low carbon, non hardenable steel containing straight chromium, and belongs to the ferritic group of steels. This steel is known for its formability and practical mechanical properties. It can be used in certain chemical applications due to its resistance to nitric acid.

Stainless steel 430 does not have good anti-corrosion properties. Its applications include kitchen grade tables and utensils, dishwasher linings, automotive trims, range hoods, industrial roofing and wall cladding, and handling equipment for mining.


Stainless steel 420 is a martensitic higher carbon steel that provides good corrosion resistance with the benefit of increased strength and hardness. It is magnetic in both annealed and hardened conditions.

Stainless steel 420 should not be used at sub-zero temperatures where heavy stresses are involved. It is most commonly used in molds, ball bearings, dental and surgical instruments, cutlery, scissors, gears, shafts, cams, and pivots. It may also be used at moderately elevated temperatures for valve parts and springs.


Stainless steel 316 is generally composed of 16-18% chromium, 10-14% nickel, 2-3% molybdenum, and about 0.08% carbon. They achieve their austenitic microstructure through the addition of nickel and the added molybdenum makes this grade more corrosion resistant than the other types.


Stainless Steel_316

Stainless steel 316


When you are using stainless steel in a corrosive environment (e.g. pools with chlorine, outdoors where salt is used in the winter for the roads, anywhere near the ocean, etc.) you need to use Type 316 stainless steel . This is the type of stainless steel used by NASA and in medical devices. It is extremely stainless and rustproof. It is also the most expensive of the grades discussed here.



Stainless Steel 304 Heavy Duty Corner Guard

Stainless Steel 304 Heavy Duty Corner Guard

Stainless steel 304 is the most common type of stainless steel. The steel contains both chromium (18-20%) and nickel (8-10.5%) metals as the main non-iron constituents. It has a higher corrosion resistance than regular steel and is widely used because of the ease with which it is formed into various shapes.

Type 304 stainless steel can resist the corrosive action of acids found in fruits, milk, meat, and vegetables and is fairly resistant to abrasion. Therefore, it is commonly used in the food industry. It is ideal for brewing, milk processing, and wine making. It is also suitable for pipelines, fermentation vats, yeast pans, and storage tanks.

Type 430 stainless steel is a substandard material and will exhibit the start of rusting almost immediately. The Corner Guard Store uses Type 304 stainless steel in about 80% of the products that we make. More corrosive and harsh environments require Type 316 stainless steel. Anything less than 316 in any of those environments will result in a very disappointed customer, which is something we bend over backward to avoid. For other products available at The Corner Guard Store , visit our website. For further inquiries feel free to contact us.