What is the mechanical properties of X2CrNi18-9 ?
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What material is X2CrNi18-9 ?
X2CrNi18-9 (material number 1.4307) is a low-carbon, austenitic stainless steel commonly known as AISI 304L. It is an 18/8 stainless steel (approx. 18% chromium, 8-10% nickel) designed for superior corrosion resistance and excellent weldability. It is non-magnetic, easy to polish, and used in chemical, food, and petrochemical industries.
What material is X2CrNi18-9 equivalent to?
X2CrNi18-9 (material number 1.4307) is primarily equivalent to AISI 304L. It is a low-carbon, austenitic chromium-nickel stainless steel often referred to as a "304L variant" or "V2A steel".
X2CrNi18-9 Chemical Composition (%)
| Element | C (Carbon) | Si (Silicon) | Mn (Manganese) | P (Phosphorus) | S (Sulfur) | Cr (Chromium) | Ni (Nickel) | N (Nitrogen) |
|---|---|---|---|---|---|---|---|---|
| Min (%) | - | - | - | - | - | 17.5 | 8.0 | - |
| Max (%) | 0.03 | 1.00 | 2.00 | 0.045 | 0.015 | 19.5 | 10.5 | 0.11 |
X2CrNi18-9 Mechanical Properties
| Condition | Tensile Strength σb / MPa | Yield Strength σs / MPa | Elongation after Fracture δ / % |
|---|---|---|---|
| Steel Tubes | ≥ 470 | Rp0.2: ≥ 180Rp1.0: ≥ 215 | l (Longitudinal): ≥ 40t (Transverse): ≥ 35 |
X2CrNi18-9 Stainless Steel: Corrosion Resistance
X2CrNi18-9 stainless steel exhibits exceptional corrosion resistance, primarily attributed to its high chromium and nickel content. The chromium element forms a dense oxide film (passive film) on the surface, which effectively resists the intrusion of corrosive media. It outperforms standard 304 stainless steel in environments containing chloride ions (such as seawater); however, it should be noted that stress-relief treatment is required in environments where the chloride ion concentration exceeds 200 ppm and the temperature exceeds 60°C.
X2CrNi18-9 Stainless Steel: Processing Characteristics
X2CrNi18-9 possesses excellent cold formability and a low work-hardening rate, making it suitable for processes such as deep drawing and spin forming-for instance, in the stamping and forming of kitchenware. For machining operations, the use of carbide cutting tools is recommended, employing low cutting speeds and high feed rates to minimize work hardening.
X2CrNi18-9 Stainless Steel: Welding Performance
X2CrNi18-9 demonstrates outstanding weldability and is compatible with various welding methods, including TIG, MIG, and laser welding; post-weld heat treatment is generally not required. For filler material, the use of ER308L welding wire (AWS standard) is recommended to ensure that the corrosion resistance of the weld seam matches that of the base metal. During welding, careful control of welding parameters is essential to prevent weld cracking and avoid degradation of mechanical properties within the heat-affected zone.
X2CrNi18-9 Stainless Steel: Heat Treatment
Solution treatment is the primary heat treatment method applied to X2CrNi18-9 stainless steel. The treatment temperature typically ranges from 1010°C to 1150°C, followed by rapid cooling (either water quenching or air cooling) to achieve a uniform austenitic microstructure. This treatment process enhances the material's strength and toughness while simultaneously improving its corrosion resistance. Following solution treatment, the material's hardness typically falls within the range of HBW ≤ 187 or HRB ≤ 90.
| Steel grade | Heat treatment during fabrication and further processing |
Hot working during further processing e.g. hot bending |
|||
| Name | Number | Solution anneailing Temperature ℃ ① |
Type of cooling ② |
Temperature ℃ |
Type of cooling |
| X2CrNi18-9 | 1.4307 | 1000 to 1100 | w or a or g | 1150 to 850 | a or g |
X2CrNi18-9 Stainless Steel Applications
Chemical Industry: Used in the manufacture of chemical equipment, piping, vessels, etc.
Food Processing: Suitable for food processing equipment, storage tanks, transfer pipelines, etc.
Medical Equipment: Used for medical instruments, surgical tools, etc.
Architecture and Decoration: Used for architectural ornamentation, railings, handrails, etc.
Shipbuilding: Used for structural components, decks, piping, etc., in marine vessels.
X2CrNi18-9 vs. X5CrNi18-10: Key Differences
Both X2CrNi18-9 (1.4307, 304L) and X5CrNi18-10 (1.4301, 304) are austenitic stainless steels that exhibit similar corrosion resistance; however, their key difference lies in their carbon content. X2CrNi18-9 features a lower carbon content (≤ 0.03%), resulting in superior resistance to intergranular corrosion following welding, whereas X5CrNi18-10 (≤ 0.07% C) offers slightly higher strength and is typically more readily available.
X2CrNi18-9 (1.4307 / 304L) Product Range from GNEE
Sheets & Plates:
Cold Rolled (CR): 0.3mm – 6.0mm
Hot Rolled (HR): 3.0mm – 120mm
Pipes & Tubes:
Seamless: Suitable for high-pressure environments.
Welded: Decorative tubing, large-diameter industrial welded pipes.
Bars & Sections:
Round bars, square bars, hexagonal bars, angles, channels.
Strips / Coils:
Precision-slit strips, available in various hardness specifications.
We maintain a warehouse inventory of tens of thousands of tons of stainless steel. For 1.4307 stainless steel-specifically standard-specification plates and coils-we offer rapid delivery within 3 to 7 days. Leveraging established international packaging standards (including wooden crates for sea freight and steel strapping reinforcement), we ensure that shipments remain free from rust and damage during long-distance ocean transit.
