STAINLESS STEEL 304 VS 304L VS 316 VS 316L
What are “steel” and “iron”? What are their characteristics and relations? How do the 304, 304L, 316, and 316L seen in ordinary times come from? What’s the difference between them?
Steel: Material consisting mainly of iron, generally containing less than 2% carbon, and containing other elements.– GB/T13304-91 Classification of Steel
Iron: Metallic element, atomic number 26. Iron materials are ferromagnetic and have good plasticity and thermal conductivity.
Stainless steel: air, steam, water, and other weak corrosive medium or stainless steel. Usually used for 304, 304L, 316, 316L, is austenitic stainless steel 300 series of steel.
304 STAINLESS STEEL
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PERFORMANCE IS INTRODUCED
304 stainless steel is the most common, as a widely used steel, with good corrosion resistance, heat resistance, low-temperature strength, and mechanical properties. Stamping, bending, and other heat processing good, no heat treatment hardening phenomenon (no magnetic, then use temperature -196℃ ~ 800℃).
SCOPE OF APPLICATION
Household items (1, 2 types of tableware, cabinets, indoor plumbing, water heater, boiler, bathtub). Auto parts (windshield wipers, mufflers, molds). Medical equipment, building materials, chemistry, food industry, agriculture, ship parts, etc.
304L STAINLESS STEEL (L IS LOW CARBON)
PERFORMANCE IS INTRODUCED
As a low-carbon 304 steel, its corrosion resistance is similar to that of 304 steel in general condition, however, after welding or stress relief, it has excellent resistance to grain boundary corrosion. It can also maintain good corrosion resistance without heat treatment at -196℃ ~ 800℃.
SCOPE OF APPLICATION
Open field machines for chemical, coal, and petroleum industries with high requirements for corrosion resistance at the grain boundary, heat-resistant parts of building materials, and parts with difficulty in heat treatment.
316 STAINLESS STEEL
Stainless steel Mic Pendant
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PERFORMANCE IS INTRODUCED
316 stainless steel because of the addition of molybdenum, so its corrosion resistance, atmospheric corrosion resistance, and high-temperature strength are particularly good, can be used under harsh conditions; Work hardening excellent (non – magnetic).
SCOPE OF APPLICATION
Seawater equipment, chemical, dyestuff, papermaking, oxalic acid, fertilizer, and other production equipment; photography, food industry, coastal facilities, ropes, CD rods, bolts, nuts.
316L STAINLESS STEEL (L IS LOW CARBON)
PERFORMANCE IS INTRODUCED
As a kind of 316 steel, the low carbon series has the same characteristics as 316 steel and has excellent corrosion resistance to the grain boundary.
SCOPE OF APPLICATION
Products with special requirements against grain boundary corrosion.
THE PERFORMANCE COMPARISON
Chemical composition
316 and 316L stainless steel belong to the category of molybdenum-containing stainless steel. The molybdenum content in 316L stainless steel is slightly higher than that in 316 stainless steel. Due to the molybdenum in the steel, the total performance of the steel is better than 310 and 304 stainless steel. Under high-temperature conditions, when the concentration of sulfuric acid is lower than 15% and higher than 85%, 316 stainless steel has a wide range of USES. 316 stainless steel also has good chloride erosion properties, so it is commonly used in the Marine Environment. The maximum carbon content of 316L stainless steel is 0.03 and can be used after welding where annealing is not possible and maximum corrosion resistance is required.
To sum up, based on all the factors, I think the best choice of jewelry material is 316L stainless steel, which has excellent corrosion resistance, heat resistance, welding, and mechanical properties. Low carbon stainless steel – 316L stainless steel is the best choice.
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