Difference between 430 and 304 Stainless Steel

Find The Difference Between Stainless Steel 304 and 430?

One of the most popular grades of ferritic stainless steel with magnetic characteristics is 430. The most popular grade of stainless steel with non-magnetic characteristics is 304. The 430 composition has less than 1% nickel and up to 18% chromium in addition to carbon, manganese, silicon, phosphorus, sulphur, and iron. With 18% chromium, carbon, manganese, silicon, phosphorus, sulphur, nitrogen, and iron, the 304 has 8% nickel in its composition. The 304 materials have a minimum yield strength and tensile strength of 215 MPa and 505 MPa, respectively, thanks to this chemical composition. The minimum yield strength and tensile strength of material 430 are up to 260 MPa and 600 MPa, respectively. 430 has a melting point that can reach 1510 degrees Celsius. Denser than the 430 substance is the 304 material.

430 And 304 Stainless Steel Machinability

Compared to stainless steel grade 304, the 430 material is far more machinable. The absence of nickel also gives the 430 material greater ductility. It can be machined more quickly than material 304. Additionally, food-grade applications use the 430 material. Similar to 430, the 304 material is utilised in grills and barbecues, but 304 has greater corrosion resistance. Nitric acid components don't corrode the 430 material, but other corrosive chemicals do so more readily. With regard to the majority of reducing and oxidising chemicals, including mild acids, the 304 material exhibits general corrosion resistance.

Magnetic Properties of 304 and 430 Stainless Steel

The ferritic and magnetic substance 430. It is categorised as a soft ferritic substance since it could be easily demagnetized. The austenitic, non-magnetic substance in 304 is. These materials' magnetic and non-magnetic properties help them deal with magnetic and electric fields. The 430 material's magnetic characteristics can be altered by heat treatment, heat hardening, or elevated temperatures, whereas the 304 material cannot; it is always non-magnetic.

Price of 430 Vs 304 Stainless Steel

Due to two factors, the 304 evaluation typically costs more than the 430 evaluation. One is that the nickel concentration of the 304 material is higher. The 304 becomes more expensive than the 430 material since nickel is an expensive substance. The second justification is the materials' widespread application or familiarity. Of all the stainless steel grades, 304 is the one that is used the most. This also increases the price's demand. Although there are pricey 430 versions with minor compositional differences, the 304 is still the more expensive of the two.

Stainless Steel 304 Vs 430 Weldability

Due of its low nickel concentration, the 430 material may be easily welded, machined, and shaped. The 304 material is more difficult to shape and weld than the 430 material due to its greater hardness. The 430 can also be heat treated after welding to increase strength because it is a strain-hardenable material. Heat treatment cannot be used to increase the strength of 304. However, several heat treatment techniques can increase the 304 material's hardness.

 

 

 

 

 

 

 

• Oxidation resistance & heat up to 1500 °F (816 °C) 
• Good corrosion resistance

 

 

• Dish washer linings
• Utensils
• Automotive trim
• Range hoods
• Refrigerator cabinet panels
• Chimney liners
• Stove trim rings
• Formed / Drawn parts
• Handling equipment for mining
• Industrial roofing & wall cladding
• Grade 430F used in machined parts
• and other Heat-resisting applications

 

 

 

Most 430 is used in the BA of N4 finishes. Flat products surface are protected with a white polyethylene (PE) film.

• BA (bright annealed)
• N4 (polished)
• 2B (cold rolled, skin passed)