24 July 2021 400 Series Stainless Steel
430 Stainless Steel Plate
430 stainless steel is a ferritic, straight chromium, non-hardenable grade, combining good corrosion resistance and formability characteristics with useful mechanical properties. Its ability to resist nitric acid attack permits its use in specific chemical applications but automotive trim and appliance components represent its largest fields of application.
430 stainless steel is a kind of stainless steel with good corrosion resistance. It has better thermal conductivity than austenitic stainless steel, thermal expansion coefficient smaller than austenitic stainless steel, heat fatigue resistance, addition of stabilizing element titanium, and good mechanical properties of welded joints. 430 stainless steel is used for building decoration, fuel burner parts, household appliances, and home appliance parts. 430F is a steel grade with free-cutting performance added to 430 steel. It is mainly used for automatic lathes, bolts and nuts. 430LX adds Ti or Nb to 430 steel to reduce the C content, which improves the processing performance and welding performance. It is mainly used in hot water tanks, hot water supply systems, sanitary appliances, household durable appliances, bicycle flywheels, etc. Because its chromium content is 18%, it is also called 18/0 or 18-0. Compared with 18/8 and 18/10, it contains slightly less chromium, and the hardness is correspondingly lower.
Grade 430F is the free-machining version of this grade, available in bar form for use in automatic screw machines. Grade 434 is the molybdenum bearing version of Grade 430 and has the same useful combination of properties. Its molybdenum addition improves corrosion resistance.
These properties for 430 are specified for flat rolled product (plate, sheet and coil) in ASTM A240/A240M. Similar but not necessarily identical properties are specified for other products such as forgings and bar in their respective specifications. Properties of Grade 430F are specified for bar in ASTM A582.
Chemical Composition:
Carbon (C): ≤0.12%
Silicon (Si): ≤0.75%
Manganese (Mn): ≤1.00%
Phosphorus (P): ≤0.040%
Sulfur (S): ≤0.030%
Nickel (Ni): ≤0.60%
Chromium (Cr): 16.00~18.00%
Mechanical Properties:
Density: 7.75g/cm³
Melting point: 1427℃
Expansion coefficient: mm/℃(at 20-100℃)
Young's modulus: kN/mm²
Rigid modulus: kN/mm²