X4CrNi18-12 /1.4303 / 305 stainless steel
Jun 16, 2025
Leave a message
When sourcing stainless steel for deep drawing or high-formability applications, you may encounter the grade X4CrNi18-12, also known as EN 1.4303 or AISI 305. But what exactly is it, and when should you choose it over standard 304 or 316 stainless steel?
In this article, we explain the chemical composition, key properties, application scenarios, and common buyer FAQs related to 1.4303 stainless steel, helping you make an informed procurement decision.
What is X4CrNi18-12 / 1.4303 / 305 Stainless Steel?
X4CrNi18-12 is the material name under DIN EN 10088.
1.4303 is the EN numeric designation.
AISI 305 is the ASTM/AISI equivalent grade.
This stainless steel grade belongs to the austenitic family, similar to 304 (1.4301), but with higher nickel content to improve cold workability and deep-drawing performance.
Chemical Composition of 1.4303 / AISI 305
Higher nickel content than 304 (~8–10%) significantly improves formability, especially in cold forming operations.
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 10.5 – 13.0 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.015 |
305 stainless steel Mechanical & Physical Properties
These characteristics make 1.4303 ideal for deep-drawn parts, such as kitchen sinks, housings, and instrument covers.
| Property | Typical Value |
|---|---|
| Yield Strength (Rp0.2) | ~200 MPa |
| Tensile Strength | 500–700 MPa |
| Elongation (A5) | ≥ 40% |
| Density | ~8.0 g/cm³ |
| Magnetism | Non-magnetic |
What is the difference between 1.4303 and 1.4301 (304)?
| Feature | 1.4301 (304) | 1.4303 (305) |
|---|---|---|
| Nickel (%) | 8.0–10.5 | 10.5–13.0 |
| Formability | Good | Excellent |
| Deep Drawability | Moderate | High |
| Cost | Slightly lower | Slightly higher |
Applications of 1.4303 / AISI 305 Stainless Steel
Deep-drawn and spun components
Automotive interior parts
Appliance housings and panels
Kitchen equipment and cookware
Electronic enclosures and shells
Is 1.4303 the same as 304 stainless steel?
No. While both are austenitic and similar in corrosion resistance, 1.4303 has higher nickel content, giving it better formability than 304 (1.4301).
Can 1.4303 stainless steel be welded?
Yes. It has excellent weldability, but post-weld annealing is recommended for critical components to reduce stress and restore corrosion resistance.
We offer 1.4303 in standard product forms including tubes, pipes, plates, strips, sheets, round bars, flat bars, forgings, hexagonal bars and wires. These products are available in a wide variety of sizes. For detailed specifications and product information, please visit the following website.
| Parameter | Value |
|---|---|
| Standard Name | X4CrNi18-12 / 1.4303 / AISI 305 |
| Type | Austenitic stainless steel |
| Corrosion Resistance | Comparable to 304 |
| Formability | Superior (deep drawing & bending) |
| Surface Finishes Available | 2B, BA, No.4, mirror |
| Common Forms | Coil, sheet, strip, pipe, bar |
Send Inquiry