Stainless Steel: Grade 430

Stainless steel type 1.4016 is also commonly known as grade 430. Stainless steel 430 combines good corrosion resistance with good formability and ductility.

It is a ferritic, non-hardenable plain Chromium stainless steel with excellent finish quality.

Stainless steel 430 also has excellent resistance to nitric attack, which makes it well suited to use in chemical applications. The most popular applications for 430 are in domestic appliances and decorative trim.

ASTM A240/A240M

Property data given in this document is typical for bar products covered by EN 10088-3:2005. ASTM, EN or other standards may cover products sold. It is reasonable to expect specifications in these standards to be similar but not necessarily identical to those given in this datasheet.

Chemical Composition of Stainless steel 430

Table 1. Typical chemical composition for 430 stainless steel alloys

Properties of Stainless steel 430

Mechanical Properties of Stainless steel 430

Table 2. Mechanical properties of 430 stainless steel alloys

Physical Properties of Stainless Steel 430

Table 3. Physical properties of 430 stainless steel alloys

Alloy Designations

Stainless steel 430 also corresponds to the following standard designations and specifications:

Corrosion Resistance of Stainless steel 430

Stainless steel 430 has good corrosion resistance to a large variety of media including nitric acid and some organic acids. The corrosion resistance of type 430 is optimal when it has a highly polished surface. As with other ferritic grades, resistance to stress corrosion cracking is very high.

Heat Resistance of Stainless steel 430

Stainless steel 430 has good resistance to oxidation in intermittent service to 870°C and in continuous service to 815°C. After prolonged heating at 400-600°C, Stainless steel 430 may become brittle and require annealing.

Fabrication of Stainless steel 430

Fabrication of all stainless steel should be done only with tools dedicated to stainless steel materials. Tooling and work surfaces must be thoroughly cleaned before use. These precautions are necessary to avoid cross contamination of stainless steel by easily corroded metals that may discolour the surface of the fabricated product.

Cold Working of Stainless steel 430

Stainless steel 430 is readily cold workable but is not quite as ductile as 304 stainless. The advantage of 430 over 304 is that the 430 does not work harden to the same extent.

Hot Working of Stainless steel 430

Fabrication methods, like forging, should occur after uniform heating to 816-1038°C. The component should then be air cooled to room temperature and annealed. Grain growth will occur due to prolonged exposure to forming temperatures. This should be avoided as excessive grain growth can cause an ‘orange peel’ texture on the surface of the material. As grade 430 is commonly used in aesthetic applications, surface finish is extremely important.

Heat Treatment of Stainless steel 430

Stainless steel 430 cannot be hardened by heat treatment.

Annealing is done by heating to 815°C, soaking for 30minutes per 25mm of thickness, furnace cooling to 600°C, then quickly air-cooling.

The component will become brittle if slow cooled from 540-400°C.

Machinability

Stainless steel 430 is relatively easily machined. Machining can be enhanced if the following rules are adhered to:

• Cutting edges must be kept sharp. Dull edges cause excess work hardening.
• Cuts should be light but deep enough to prevent work hardening by riding on the surface of the material.
• Chip breakers should be employed to assist in ensuring swarf remains clear of the work
• Low thermal conductivity of austenitic alloys results in heat concentrating at the cutting edges. This means coolants and lubricants are necessary and must be used in large quantities.

Welding of Stainless steel 430

Stainless steel 430 can be readily welded by all fusion methods but preheating to 150-200°C is recommended. Annealing at 790-815°C can relieve embrittlement of the heat-affected zone.

Depending on the application, recommended filler rods or electrodes are grades 430, 308L, 309 310, or 312 stainless steels.

Applications of Stainless steel 430

Stainless steel 430 is typically used in:

• Low cost sinks
• Decorative trim
• White & Brown Goods (washing machines, dishwashers, cookers)
• Refrigerators
• Stove element supports
• Scientific apparatus
• Fasteners
• Flue linings

Supplied Forms

Stainless steel 430 stainless steel is typically supplied by Aalco as:

• Sheet
• Strip
• Tube
• Bar
• Fittings & Flanges
• Pipe
• Plate

Source: Aalco

For more information on this source please visit Aalco

DISCLAIMER

This Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the mechanical property requirements vary widely with temper, product and product dimensions. The information is based on our present knowledge and is given in good faith. However, no liability will be accepted by the Company is respect of any action taken by any third party in reliance thereon.

As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose.

Any advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. Any contract between the Company and a customer will be subject to the company’s Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.

This information has been sourced, reviewed and adapted from materials provided by Aalco - Ferrous and Non-Ferrous Metals Stockist.

For more information on this source, please visit Aalco - Ferrous and Non-Ferrous Metals Stockist.