430 ss round bar

430 stainless steel round bar is manufactured from 430 stainless steel (Chinese grade: 1Cr17) through processes such as hot rolling or cold drawing. It represents the economical and practical option within the stainless steel round bar family. Being nickel-free with chromium as its primary alloying element, it is also known as 'stainless iron'. Offering excellent corrosion resistance, machinability and relatively low cost, it is widely used in stainless steel round bar applications.

Surface Condition:

• Black-skinned bar (hot-rolled): Surface exhibits scale, rough texture, and wider dimensional tolerances, offering lower cost.
• Pickled bar (hot-rolled followed by acid pickling): Surface appears silvery-white, free of scale, and relatively smooth.
• Bright bar (cold-drawn/ground): Features a smooth surface, precise dimensions, and high finish, suitable for direct machining.

Specification Range:

Diameter range is extensive, typically from Φ1.0mm to Φ300mm or larger, customisable to requirements. 

Chemical composition % by mass MAX unless otherwise stated

• Excellent corrosion resistance

Containing approximately 16–18% chromium, it forms a dense chromium oxide passivation layer on its surface, providing good resistance to atmospheric exposure, water vapour, numerous organic acids, and oxidising media such as nitric acid.

Note: Its corrosion resistance surpasses that of carbon steel but falls significantly short of austenitic stainless steels like 304, particularly in chloride-containing environments (e.g., saltwater) and strongly acidic conditions.

• Excellent workability (formability)

430 stainless steel possesses moderate strength and hardness, exhibiting outstanding cold working properties such as deep drawing and bending. It lends itself readily to forming into components of diverse shapes.

• Good thermal conductivity

As a ferritic stainless steel, its thermal conductivity is approximately 30%-50% higher than that of austenitic stainless steels (e.g., 304), making it highly suitable for components requiring efficient heat transfer, such as cookware and heat exchangers.

• Low Thermal Expansion Coefficient

Its thermal expansion coefficient is comparable to that of ordinary carbon steel, resulting in minimal dimensional changes when heated. This property is advantageous for precision components subject to temperature variations or those used in conjunction with carbon steel.

• Magnetic Properties

430 stainless steel is a ferromagnetic material and can be attracted by magnets. This property enables its widespread application in motors, electrical components, and other fields requiring magnetic properties.

• High Cost-Effectiveness

This represents one of 430 stainless steel's most prominent advantages. Due to the absence of expensive nickel, its price is significantly lower than that of austenitic stainless steels like 304 or 316. Provided performance requirements are met, it can effectively reduce product costs.

• Architecture and Decoration: Door and window hardware, interior trim strips, stair handrails, and other applications where high corrosion resistance is not required.
• Household Appliances and Kitchenware: Gas hob components, cutlery, kitchen sinks, knives, etc. Its magnetic properties also render it suitable for the base layer of induction cookware.
• Automotive exhaust systems: Primarily employed in mufflers and other high-temperature components where extreme corrosion resistance is not paramount.
• Hardware and structural components: Standard fasteners including bolts, nuts, shafts, pins, and general structural elements.
• Electrical engineering: Leveraging its magnetic properties for manufacturing magnetic components within motors and transformers.

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