430
430 properties and heat treatment forged piece, Including 430 application and specifications, We have all specifications，Including 430 steel plate, 430 sheet, 430 square steel, 430 flat bar,430 round bar,430 forgings, we can own production and sales.
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We can produce the 430 has the following specifications:
Round bar steel: 1mm to 3000mm
Square-shape steel: 1mm to 2000mm
Plate steel:0.1mm to 2500mm
Width: 10mm to 2500mm
Lenth: We can supply any lenth based on the customer's requirement.
Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes
Tubings: OD: φ6-219 mm, with wall thickness ranging from 1-35 mm.
Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement
Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
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Chemical composition % of the ladle analysis of grade 430 and Standards
Product Description:
SX 430 Stainless Steel
SX 430 Technical Data
Summary
SX 430 Stainless Steel
SX 430 Technical Data
Summary
SX430 is a low-carbon plain chromium ferritic Stainless Steel. The steel has good corrosion resistance in mildly corrosive environments and good resistance to oxidation at elevated temperatures. In the annealed condition the steel is ductile, does not harden excessively during cold work and can be formed using a large variety of roll forming or mild stretch-bending operations, as well as the more common drawing and bending processes. The steel has limited weldability and should not be used in the as welded condition for dynamic or impact loaded structures. Being a ferritic material, 430 is liable to brittle fracture at sub-zero temperatures, and cannot be used in cryogenic applications. As the steel does not contain nickel or molybdenum, it is cheaper than any of the 300 series steels.
Typical Applications
430 is a simple corrosion and heat-resisting grade and finds application in areas where mildly corrosive conditions occur or where scaling resistance at moderate temperatures is required. Typical applications include: Automotive trim, architectural applications such as industrial roofing and wall cladding, kitchen utensils, sinks, washing machine parts and industrial pipe and tube. Materials handling equipment in the mining and sugar industry. Heat resisting applications up to 759oC.
Chemical Composition
| Analysis % | oC | Mn | P | S | Si | Cr |
| ASTM A 240 | 0.12 max | 1.0 max | 0.045 max | 0.03 max | 1.0 max | 16.0-18.0 |
| Typical | 0.05 | 0.7 | 0.021 | 0.024 | 0.6 | 17 |
Typical properties in the annealed condition
The properties quoted in this publication are typical of mill Product and unless indicated should not be regarded as guaranteed minimum values for design purposes. For these purposes refer to the relevant specification.
1. Mechanical properties at room temperature
| Typical | Minimum | |
| Tensile Strength, MPa | 530 | 450 |
| Proof Strength, 0.2 % , MPa | 360 | 205 |
| Elongation (Percent in Lo=5.65 So) MPa | 25 | 22 |
| Hardness | 160 | - |
2. Properties at elevated temperatures
Short time elevated temperature tensile strength
| Temperature, oC | 300 | 400 | 550 | 650 | 750 |
| Strength, MPa | 450 | 430 | 220 | 120 | 50 |
Creep data
Stress for a creep rate of 1% in 10 000 h
| Temperature, oC | 550 | 600 | 650 | 700 | 750 |
| Stress, MPa | 50 | 30 | 15 | 5 | 3 |
Recommended maximum service temperature
(Oxidising Conditions)
Continuous Service 750 oC
Intermittent Service 850 oC
Note: Service in the temperature range 425 -525 oC for over 100 hours will cause the steel to be brittle on cooling to room temperature.
3. Corrosion resistance
3.1 Aqueous
| Temperature oC | 20 | 80 |
| Concentration, % mass | 1 5 10 20 80 100 | 1 5 10 20 80 100 |
| Sulphuric Acid | 2 2 2 2 2 1 | 2 2 2 2 2 2 |
| Nitric Acid | 0 0 0 0 1 2 | 0 0 0 1 1 2 |
| Phosphoric Acid | 0 0 2 2 1 0 | 0 0 2 2 1 1 |
| Acetic Acid | 0 0 1 1 1 0 | 0 2 2 2 2 0 |
Key: 0 = resistant - corrosion rate less than 100 m/year
1 = partly resistant - corrosion rate less than 1000 m/year
2 = non resistant - corrosion rate more than 1000 m/year
3.2 Atmospheric
The performance of 430 compared with other metals in various environments is shown in the following table. The corrosion rate is based on a 10 year exposure.
| Environment | Corrosion Rate (um/year) | ||
| SX 430 | Aluminium-3S | Mild steel | |
| Rural | 0.0025 | 0.028 | 4.3 |
| Marine | 0.0381 | 0.424 | 25.7 |
| Marine-Industrial | 0.0406 | 0.546 | 37.1 |
430 has adequate weldability for many applications. However it is prone to embrittlement in the weld/haz. The fatigue properties of 430 in the welded condition are poor and it is not recommended for applications where applied tensile or impact loading will be experienced.
Thermal Processing
1. Annealing
Annealed 430 is in the softest and most ductile condition, and may be used for cold-working operations. The annealing temperature range is 760oC followed by cooling in air.
2. Stress relieving
Stress relief after Welding is not usually required, although 200-300oC is the recommended stress relieving temperature range.
3. Hot working
Initial forging and pressing temperature range: 1100 - 1150oC
Finishing temperature: below 750oC
Avoid extended holding times above 1000oC as excessive grain growth takes place, which severally reduces ductility
Note: Soaking times to ensure uniformity of temperature are longer for Stainless Steels than for carbon steels. Use up to 1/2 times the time employed for the same thickness of mild steel.
Cold Working
430 can readily be fabricated by cold working. Typical operations include bending, forming, deep drawing and upsetting.
Machining performance
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Principal Design Features
One of the most widely used precipitation hardening grades in the business. While soft and ductile in the solution annealed condition, it is capable of high properties with a single precipitation or aging treatment. Characterized by good corrosion resistance, high harness, toughness and strength.
Machinability
Long, gummy chips characterize this alloys machinability. It can be machined in the annealed condition, however condition H1150M will yield best results. Post machining solution treatment of parts will be required prior to final hardening if machining in this condition.
Heat Treatment
CONDITION A--Soak at 1900 F (1038 C) for 30 minutes and cool below 60 F (16 C) for complete martensite transformation. CONDITION H 950- Treat Condition A material at 900 F(482 C) for 1 hour, air cool.. CONDITION H925, H1025, H1075, H1100, H1150- Soak solution treated material for 4 hours at specified temperature, air cool, CONDITION H1150M- Soak solution treated material at 1400 F (760 C) for 2 hours, air cool, then re-heat to 1150 F (620 C) for 4 hours and air cool.
Welding
Successfully welded by common fusion and resistance methods, this alloy should not be joined by oxyacetylene welding. AWS E/ER630 filler metal is recommended if required.
Forging
Soak for 1 hour at 2150 F (1177 C) prior to forging. Do not work below 1850 F (1010 C). Post-work solution treatment is required prior to final hardening.