EN 1.4016—also known as AISI 430 and X6Cr17—is one of the most widely used ferritic stainless steels worldwide. It is a medium-chromium, nickel-free stainless steel designed for good corrosion resistance in indoor and mildly corrosive environments, combined with excellent formability and an attractive surface finish for visible parts.
With a typical chromium content around 16–18%, 1.4016 offers better corrosion resistance than standard carbon steels and many low-alloy steels, while remaining a cost-effective alternative to nickel-alloyed austenitic grades. The material is magnetic (as typical for ferritic stainless steels) and is naturally resistant to chloride stress corrosion cracking, which can be beneficial in certain applications.
1.4016 is commonly specified across multiple standards and naming systems, including W.Nr. 1.4016, BS 430S17, SIS 2320, AFNOR Z8C17 and JIS SUS430. Final chemical limits and mechanical properties depend on the applicable product standard and are confirmed on the EN 10204 / 3.1 inspection certificate.
| Element | Typical range (wt. %) |
|---|---|
| C | ≤ 0.08 (typical) / per standard |
| Si | ≤ 1.00 |
| Mn | ≤ 1.00 |
| P | ≤ 0.04 |
| S | ≤ 0.015 |
| Cr | 16.0 – 18.0 |
| Ni | ≤ 0.75 |
| N | ≤ 0.03 |
| Fe | Balance |
Note: Older or alternative references may show different chromium ranges. The applicable product standard and the EN 10204 / 3.1 certificate are decisive.
| Property | Typical value (annealed) |
|---|---|
| Tensile strength (Rm) | 450 – 600 MPa |
| Yield strength (Rp0.2) | ≥ 280 MPa |
| Elongation (A5) | ≥ 20 % |
| Hardness | ≤ 200 HB |
| Impact toughness | per standard / see EN 10204 3.1 certificate |
Exact values are stated on the material certificate EN 10204 / 3.1.
1.4016 / AISI 430 is supplied in sheet, plate, strip and bar. It is often selected for formed parts, panels and components requiring good surface quality and moderate corrosion resistance. Steelinox can also supply bright drawn and ground round bar for tighter tolerances and improved surface finish.
Round bar (bright drawn / ground): tolerance h9 according to DIN EN 10278 (formerly DIN 671), length 3 m
Stock sizes (round bar): Ø 8, 10, 12, 14, 15, 16, 18, 20, 22, 25, 28, 30, 33, 35, 40, 45, 50, 60, 70, 80 mm
Sheets / plates: thickness 3 – 12 mm
Cutting options: plasma cutting, water-jet cutting, laser cutting and sawn cuttings (on request)
Centerless grinding available on request. Provide target diameter, tolerance class, straightness and surface finish requirements for precision shafts or mechanical parts.
Because 1.4016 combines good corrosion resistance with formability and an attractive surface appearance, it is widely used for:
Yes. 1.4016 (AISI 430) is a ferritic stainless steel and is therefore magnetic. This is a normal characteristic of ferritic grades and does not indicate lower quality. Magnetism can be advantageous in certain industrial and separation applications.
1.4016 offers good corrosion resistance in indoor and mildly corrosive environments. For outdoor exposure, frequent condensation, or chloride-containing conditions, austenitic grades such as 1.4301 (304) or 1.4404 (316L) are often preferred. The right choice depends on the actual environment, cleaning agents and expected lifetime.
Yes. 1.4016 has excellent formability and is widely used for bending and deep drawing with appropriate tooling and process control. For demanding forming operations, attention should be paid to surface condition, lubrication and forming radii to avoid surface defects.
Welding is possible, but ferritic stainless steels require control of heat input and appropriate welding procedures to maintain properties and corrosion performance. For applications with extensive welding or higher corrosion demands, stabilized ferritic grades (e.g., 1.4509) may be considered. Post-weld cleaning and passivation improve surface corrosion resistance.
Steelinox can supply 1.4016 as sheets/plates and as round bar. Plate cutting can be provided via plasma cutting, water-jet cutting, laser cutting or sawn cuttings, depending on thickness and required edge quality.
Yes. Precision round bar and centerless ground shafts are available on request. A common specification is bright drawn / ground round bar in tolerance h9 according to DIN EN 10278, supplied in 3-meter lengths. Provide your dimensional and surface requirements when requesting a quote.
Yes. Certificates are available according to EN 10204 / 3.1. The certificate confirms the chemical analysis, mechanical test results and traceability for the delivered batch.
Certificates: EN 10204 / 3.1
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