Stainless Steel 430

430 stainless steel is a general-purpose steel with good corrosion resistance. It has better thermal conductivity than austenite, a smaller thermal expansion coefficient than austenite, heat fatigue resistance, addition of stabilizing element titanium, and good mechanical properties at the weld. 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, reduces C content, improves processing performance and welding performance, and is mainly used for hot water tanks, hot water supply systems, sanitary appliances, household durable appliances, bicycle flywheels, etc.

Because of its chromium content, 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.

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% (may contain)
• 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
• Application standard: n/a (UNS)

The Product Specifications Of 430

product name	Specification/mm	Material
Cold round	Ф5.5-30	430Stainless steel
Cold drawn light circle	Ф3.0-100	430Stainless steel
Hot rolled plate	5-100	430Stainless steel
Hot rolled round steel	Ф100-200	430Stainless steel
Hot rolled round steel	Ф20-100	430Stainless steel
Hot rolled steel sheet	1-100	430Stainless steel
Hot rolled round steel	Ф200-400	430Stainless steel
Hot rolled steel sheet	4-180	430Stainless steel

The Classification And Process Of 430

Surface grade

430 stainless steel has the following states, the state is different, the dirt resistance and corrosion resistance are also different.
NO.1, 1D, 2D, 2B, No. 4, HL, BA, Mirror, and various other surface treatment states.

Feature processing technology

• 1D—The surface has discontinuous granular shape, also called matte surface. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
• 2D—Slightly shiny silver-white. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling.
• 2B—Silver white and better gloss and flatness than 2D surface. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling + tempering rolling.
• BA—The surface has excellent gloss and high reflectivity, just like the surface of a mirror. Processing technology: hot rolling + annealing shot peening pickling + cold rolling + annealing pickling

Surface polishing + tempering rolling.

• No.3—has good gloss and rough surface. Processing technology: 100~120 abrasive materials (JIS R6002) for 2D or 2B products are polished and tempered and rolled.
• No.4—has good gloss and fine lines on the surface. Processing technology: polishing and tempering rolling of 150~180 abrasive materials (JIS R6002) for 2D or 2B products.
• HL—Silver gray with hairline stripes. Processing technology: 2D or 2B products are polished with an abrasive material of appropriate granularity to make the surface continuous.
• MIRRO—in a mirror surface state. Processing technology: Grind and polish 2D or 2B products with an abrasive material of appropriate grain size to a mirror surface effect.

The Material Characteristics Of 430

• 430 stainless steel has the ability to resist oxidation to corrosion, but has a tendency to intergranular corrosion.
• 430 stainless steel wire is widely used in the axis.Because it is safe and non-toxic, it is widely used in food tableware.