EN1.4539-0509_original_Eng
2页1、 VALBRUNA NORDIC AB EN 1.4539 0509 ENG 1. High alloy Austenitic Stainless Steel EN 1.4539 UNS N08904 904L A stainless austenitic steel Typical analysis % C Cr Ni Mo Others EN 1.4539 0,02 20 25 4,2 Cu Delivery condition Solution annealed (EN 1.4539 replaces SS 2562 27) Characteristic temperatures TemperatureC Solidification range Scaling temperature in air 1390-1315 1000 Hot forming Solution annealing Stress relief annealing (max 5h) 1200-900 1050-1150 500 Use in pressure vessels (-60)-400 Mechan
2、ical properties Values for solution annealed condition acc. to EN 10272 Tensile strength Rm N/mm2530-730 Proof strength Rp0,2 N/mm2Min 230 Proof strength Rp1,0 N/mm2Min 260 Elongation A5 % Min 35 (30) Impact energy KV 20C J/cm2 Min 100 (60) Hardness HB Max 230 ( ) 160d250 Physical properties Temperature C 20 100 200 300 400 Density kg/dm3 8,0 - - - - Modulus of elasticity E kN/mm2 195 190 180 172 165 Mean coeff. of therm.expansion 20C Temp. 10-6 K-1 - 15 15,5 16 16 SpecificTherm. Capacity W/m C
3、13 13,5 14 15 16 Electrical Resistivity m 0,85 - - - - Specific heat J/kg C 500 - - - - EN 1.4539 904L is a high alloy austenitic stainless steel with low carbon content. The grade is intended for use under severe corrosive conditions. The steel grade was originally developed to resist corrosion in dilute sulphuric acid. EN 1.4539 is fully austenitic, and is less sensitive to precipitation of ferrite and sigma phase than conventional austenitic grades with high molybdenum content. Due to the com
4、bination of relatively high contents of chromium, nickel, molybdenum and copper, EN 1.4539 has good resistance to general corrosion, particulary in dilute sulphuric acid. It is non-magnetic in the annealed condition but may become slightly magnetic as a result of cold- working or welding. Design features Good resistance to uniform corrosion Good resistance to pitting and crevice corrosion Very good resistance to stress corrosion cracking Good resistance to intercrystalline corrosion Good formabi
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