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Credibility ,Yaang™ Stainless inventory includes Alloy 430 (UNS S43000) in Stainless Steel Pipes. Other product forms such as Stainless Steel Flanges, Stainless Steel Pipe Fittings.
Overview
Grade 430 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 represents its largest fields of application.
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.
Typical applications for 430 grade include:
Typical applications for 430F grade include:
Resistance
Grade 430 has good resistance to a wide variety of corrosive enviornments, including nitric acid and some organic acids. It attains its maximum corrosion resistance when in the highly polished or buffed condition. In general its resistance to pitting and crevice corrosion resistance is close to that of grade 304. Stress corrosion cracking resistance of Grade 430 is very high, as it is for all ferritic grades.
Like other high-sulphur free machining grades 430F has much reduced resistance to pitting and crevice corrosion compared to its non-free machining equivalent.
Grade 430 resists oxidation in intermittent service up to 870°C and to 815°C in continuous service. This grade may become brittle at room temperature after prolonged heating in the 400-600°C range. This effect can be eliminated by annealing.
Processing
Properties
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
|
---|---|---|---|---|---|---|---|---|---|---|
430 |
min. max. |
- 0.12 |
- 1.00 |
- 1.00 |
- 0.040 |
- 0.030 |
16.0 18.0 |
- |
- 0.75 |
- |
430F |
min. max. |
- 0.12 |
- 1.25 |
- 1.00 |
- 0.06 |
0.15 - |
16.0 18.0 |
- |
- |
- |
Grade |
Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness |
|
---|---|---|---|---|---|
Rockwell B (HR B) max |
Brinell (HB) max |
||||
430 |
450 |
205 |
22 |
89 |
183 |
430F |
552 typical |
379 typical |
25 typical |
- |
262 |
Grade |
Density (kg/m3) |
Elastic Modulus (GPa) |
Mean Coefficient of Thermal Expansion |
Thermal Conductivity |
Specific Heat 0-100°C (J/kg.K) |
Electrical Resistivity (nW.m) |
|||
---|---|---|---|---|---|---|---|---|---|
0-100°C |
0-315°C |
0-538°C |
at 100°C |
at 500°C |
|||||
430 |
7750 |
200 |
10.4 |
11.0 |
11.4 |
23.9 |
26.0 |
460 |
600 |
430F |
7750 |
200 |
10.4 |
11.0 |
11.4 |
26.1 |
26.3 |
460 |
600 |
In the table below are a list of possible alternative grades to Grade 430.
Reason it may be chosen instead of 430 | |
---|---|
430F |
Higher machinability than 430 is needed in bar product, and reduced corrosion resistance is acceptable. |
434 |
Better pitting resistance is required |
Slightly higher corrosion resistance is needed, together with greatly improved ability to be welded and cold formed | |
Much better corrosion resistance is needed, together with greatly improved ability to be welded and cold formed | |
3CR12 |
A lower corrosion resistance is acceptable in a cost-critical application |
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Yaang Pipe Industry Co., Ltd. is an international supplier of piping solutions for flange, butt welding fittings, socket welding fittings and threaded fittings. Our products are widely used in different industrial fields, including oil and gas, chemical industry, petrochemical industry, power plant, pulp and paper industry, environmental and water conservancy engineering, engineering projects, etc.