SS 430 Stainless Steel Price per kg in 2025: Forms, Cost Factors and Weight Calculation

What Drives the SS 430 Price per kg in 2025

Grade 430 (EN 1.4016, X6Cr17) is a ferritic stainless steel with roughly 16-18% chromium and no deliberate nickel addition. That composition is the reason its price behaves differently from the austenitic grades: because nickel is the most volatile element in the alloy cost basket, a nickel-free grade tracks iron and chromium rather than the nickel curve, and its per-kilogram price is therefore far more stable across a year.

For indoor panels, appliance trim, decorative sheet and non-aggressive process equipment, 430 delivers the stainless appearance and the corrosion resistance that the application actually needs at a materially lower cost than 304, which is why buyers use it as a value engineering substitute wherever chlorides are absent.

Indicative 2025 Price Ranges by Product Form

Across global trade in 2025, the SS 430 price per kg falls in the ranges below. Treat them as order-of-magnitude planning figures: the final number depends on finish, certification, quantity and freight, and each of those factors is discussed underneath.

Product form	Indicative price (USD/kg)	Typical specification
430 sheet, 2B or BA finish	1.40 - 2.10	0.4-6.0 mm, the most common decorative thickness band
430 cold-rolled coil	1.30 - 2.00	Lowest per-kg cost because mill handling is minimised
430 round bar	1.70 - 2.50	Peeled or ground finish raises the price
430 welded pipe and tube	2.00 - 3.00	Round, square and rectangular hollow sections

The Five Cost Factors Behind a Quotation

Raw material cost. Low nickel content means the alloy basket moves with chromium and scrap, not with the nickel curve, so 430 prices are noticeably steadier than 304 or 316.

Processing route. Cold-rolled and bright annealed (BA) sheet costs more per kg than hot-rolled material because of the extra rolling, annealing and pickling passes.

Surface finish. Mirror-polished or No.4 brushed finishes add polishing labour and yield loss on top of the base price.

Certification level. Material supplied with an EN 10204 3.1 inspection certificate, or meeting Pressure Equipment Directive requirements, carries a premium for testing and traceability.

Order size and logistics. Small quantities, non-standard widths and air freight all push the per-kg price up, often by more than the mill price movement over the same period.

Density, Magnetism and Weight Calculation

Grade 430 is ferritic, so it is magnetic in the annealed condition, unlike 304 and 316 which are essentially non-magnetic when annealed. Its density is approximately 7.7 g/cm3, which is lower than the 7.9-8.0 g/cm3 of the austenitic grades and slightly reduces the weight of an equivalent part. These formulas give a close estimate of mass in kilograms.

Sheet and plate: weight (kg) = length (mm) x width (mm) x thickness (mm) x 7.7 x 10 to the power of minus 6.

Round bar: weight (kg/m) = (pi x diameter squared / 4) x 7.7 x 10 to the power of minus 6 x 1000, which simplifies to diameter squared x 0.00604.

Welded pipe: weight (kg/m) = (outside diameter - wall thickness) x wall thickness x 0.02466 x (7.7 / 7.85), which simplifies to about 0.0242 for this grade.

The 0.02466 coefficient in the pipe formula is the standard mild steel constant for a density of 7.85 g/cm3, so it is scaled by the ratio 7.7 / 7.85 to suit 430. Comparing a calculated weight with the actual piece weight on the packing list is the quickest way to confirm that the wall thickness delivered matches the wall thickness ordered.

Availability and Fabrication Notes

Common supply covers 430 sheet and plate in 2B, BA and No.4 finishes, cold-rolled and hot-rolled coil, welded round, square and rectangular tube, and flat and round bar. Orders are typically certified to EN 10088, ASTM A240 or JIS G4305 depending on the destination market.

Two fabrication points are worth planning for. First, grade 430 is less weldable than the austenitic grades: welded assemblies intended for damp service are better made from a stabilised ferritic such as 430Ti or from 439, which resist sensitisation in the heat-affected zone. Second, ferritic sheet has lower formability than 304, so tight bend radii and heavy deep drawing should be checked against the actual temper before production. Where chloride exposure is expected, moving to a molybdenum-bearing austenitic grade is the correct answer rather than upgrading the finish.

Frequently Asked Questions

Q: Is 430 stainless steel magnetic?
Yes. Grade 430 is ferritic and therefore magnetic in all normal conditions, whereas 304 and 316 are essentially non-magnetic when annealed.

Q: What is the density of 430 stainless steel?
Approximately 7.7 g/cm3, slightly lower than the 7.9-8.0 g/cm3 of austenitic grades, which is why weight conversions use the 7.7 factor.

Q: Why is 430 cheaper per kg than 304?
Because it contains no deliberate nickel addition. Nickel is the most volatile element in the stainless cost basket, so removing it makes both the price level and the price trend far more stable.

Q: Where should 430 not be used?
In chloride-bearing or continuously damp service, and in welded assemblies that will see moisture. Use a stabilised ferritic or a molybdenum-bearing austenitic grade there instead.

Q: How do I convert a sheet size into a price?
Calculate the mass with the sheet formula, then multiply by the quoted price per kg for that finish and certification level. Mill price plus processing, packing and freight is what reaches your door.

Q: Which finishes are normally stocked?
2B cold-rolled, bright annealed (BA) and No.4 brushed sheet, plus hot-rolled coil and welded tube in round, square and rectangular sections.