AISI 304CU / 302HQ | 1.4567 | BS 394S17 | X3CrNiCu18-9 | Austenitic stainless steel
Data sheet according to DIN EN 10088-3 for material number 1.4567
Austenitic chromium-nickel steel AISI 304CU is also known under the designations AISI 302HQ, 1.4567, BS 394S17 and X3CrNiCu18-9. The properties of this stainless steel grade include excellent corrosion resistance (except to salt water), which is characterised by a PREN value of approximately 17.0 to 20.7. AISI 304CU / AISI 302HQ stainless steel has a tensile strength of 450 to 650 N/mm² and a hardness of ≤ 215 HB. The density of the material is around 7.9 kg/dm³ (at 20 °C). The material has average mechanical properties. It differs from the otherwise similar material AISI 304 / 1.4301 in its copper content of 3–4%, which makes stainless steel 304Cu ideal for cold forming. The material is also suitable for cold upsetting and rolling and offers good forging and welding properties, but poor machinability. It can be used at low temperatures as well as at temperatures of up to 350 °C. Like many austenitic stainless steels, 304Cu (394S17, 1.4567) is non-magnetic (amagnetic - μr ≤ 1.3) and exhibits only very weak magnetisability. The material has good polishing properties (bright polishing is possible) and is also well suited for grinding and brushing. Applications include the automotive industry and the manufacture of screws.
Specifications of the material
EN material number: 1.4567
EN short name: X3CrNiCu18-9
EN standard: 10088-3
Microstructure class: Austenitic stainless steel
Comparable standards and designations
AFNOR Z3CNU18-10
AFNOR Z3CNU18-09FF
AFNOR Z3CNU18-10FF
AISI 302HQ
AISI 304Cu
ASTM 304Cu
B.S. 394S17
JIS SUSXM7
RVS 302HQ
RVS 304Cu
UNS 30430
Properties and chemical composition of stainless steel AISI 304Cu / 1.4567
C | Mn | P | S | N | Cr | Cu | Mo | Ni | Ti | Si |
|---|---|---|---|---|---|---|---|---|---|---|
≤ 0,04 | ≤ 2,00 | ≤ 0,045 | ≤ 0,03 | ≤ 0,10 | 17,0 - 19,0 | 3,0 - 4,0 | - | 8,5 - 10,5 | - | ≤ 1,00 |
Mass fraction in % according to DIN EN 10088-3
Abbreviations: C = carbon, Cr = chromium, Cu = copper, Mn = manganese, Mo = molybdenum, N = nitrogen, Ni = nickel, P = phosphorus, S = sulphur, Si = silicon, Ti = titanium
Physical properties
Magnetisability: low
Density (kg/dm³): 7.9
Thermal conductivity (at up to 20°C): 15
Electrical resistance at room temperature (in Ω mm²/m): 0.75
Mechanical properties
The values given refer to the diameter range ≤ 160 (Ø in mm)*
Hardness in HB: ≤ 215
Yield strength Rp0.2 in Mpa: ≥ 175
Yield strength Rp1.0 in MPa: ≥ 210
Tensile strength Rm in MPa: 450-650
Elongation at break A in % (longitudinal): 45
* These figures refer to mechanical properties at room temperature in the solution-annealed state (according to EN 10088-3)
Stainless steel AISI 304CU (1.4567, X3CrNiCu18-9) has good weldability and can be used with many common welding processes such as TIG welding and MIG welding. It can also be used for arc welding, but this should be carried out with appropriate welding parameters to avoid overheating and distortion. To reduce tension and maintain the mechanical properties, the material should be allowed to cool in the air after welding. No heat treatment is required.
Forgeability
Stainless steel AISI 304CU (BS 394S17, 1.4567) has good weldability and can be used with many common welding processes such as TIG welding and MIG welding. It can also be used for arc welding, but this should be carried out with appropriate welding parameters to avoid overheating and distortion. To reduce tension and maintain mechanical properties, the material should be cooled in air after welding. No heat treatment is required.
Heat treatment and hot forming
Solution annealing (+AT) (cooling with air or water): 1000-1100 °C
Hot forming (cooling with air): 1200-900 °C
Machinability
AISI 304CU (1.4567) stainless steel is generally machinable, but this material hardens during machining. Therefore, care must be taken to select a sufficient cutting depth. In addition, suitable tools and coolants should be used to prevent overheating and extend tool life.
Corrosion resistance
Austenitic stainless steel 304CU (1.4567) has very good corrosion resistance to natural environmental influences such as rain and humidity. However, the material can be susceptible to pitting corrosion at high chloride concentrations, e.g. in swimming pools. In addition, stainless steel 304Cu/302 HQ is susceptible to intergranular corrosion when welded, especially if it is not sufficiently heat treated. In contact with salt water (sea water), pitting corrosion may occur.
Applications of stainless steel AISI 304Cu / BS 394S17
Stainless steel AISI 304CU (1.4567, X3CrNiCu18-9) is used in various industrial sectors that require high corrosion resistance. These sectors include:
Automotive industry: Stainless steel 304Cu is frequently used in the automotive industry for components that require both corrosion resistance and strength. These include fasteners such as screws, bolts and washers. Stainless steel wire is used to manufacture various items such as cable ties.
Chemical industry: In the chemical industry, this material is used to manufacture containers, pipes and reactors that come into contact with aggressive chemicals.
Construction industry: Stainless steel AISI 304CU (BS 394S17, 1.4567) is used in the construction industry for a wide range of applications due to its excellent corrosion resistance. Wire is used to manufacture reinforcing wires in concrete structures, suspension elements or filter elements such as stainless wire mesh.
Mechanical engineering: In mechanical engineering, this material is used to manufacture components for pumps or gear wheels. Wire is used to produce wire loops or rings, machine screws or mechanical fasteners, for example.
Kitchen fittings: In the kitchen fittings sector, this material is used for sinks and worktops. Stainless steel wire 304Cu / 1.4567 is used to manufacture basket grids or wire racks, for example.
Manufacture of screws: Austenitic stainless steel 304Cu / 1.4567 is regularly used for the manufacture of high-quality, corrosion-resistant screws and fasteners for use in various industries.
The data provided in this data sheet or material information sheet has been compiled to the best of our knowledge and is based on the current version of the relevant standard. We do not accept any liability for any errors.
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