ASTM B523 Zirconium And Zirconium Alloy Tubes
Seamless: 0.5-6*6-133*13000mm
Welded: 100-1200*5.0-12.0*13000mm
Extruded tube: 45-219*5.0-30.0*13000mm
Surface: pickling surface, polishing surface
Zirconium (Zr) alloys are composed of more than 95% zirconium and less than 2% tin, niobium, iron, chromium, nickel and other metals to improve mechanical properties and corrosion resistance. Zirconium alloy has good corrosion resistance, especially in high-temperature and high-pressure steam and water at 300 to 400 ℃, moderate mechanical properties, the atom's thermal neutron absorption cross-section is low, in addition, zirconium is also resistant to a variety of acids, alkalis and corrosion. Salt, with oxygen, nitrogen and other gases have a strong affinity, has been used in water-cooled nuclear reactors and corrosion-resistant parts and pharmaceutical machinery parts. In addition, it is also used in pharmaceutical, heating, water supply systems, paper and pulp industries.
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ASTM B523 R60702 chemical composition
|
Alloy |
Zr+Hf |
Fe+Cr |
Hf |
C |
N |
H |
O |
|
R60702 |
≥99.3 |
0.2 |
4.5 |
0.05 |
0.025 |
0.005 |
0.16 |
ASTM B523 R60702 mechanical property
|
Tensile strength, min |
Yield strength, 0.2% offset, min, Mpa |
Elongation at Break, % |
Hardness |
|
380 MPa |
205 MPa |
16 |
266 HV |
This specification covers three grades of zirconium and zirconium alloy seamless and welded tubes. These tubes are categorized into three grades: Grade R60702 (unalloyed zirconium), Grade R60704 (zirconium-tin alloy) and Grade R60705 (zirconium-niobium alloy). Seamless pipes shall be manufactured by any seamless method. Welded tubes shall be made from plate or strip by the automatic arc welding process or other welding methods. Filler metals shall not be used. The material shall conform to the chemical composition requirements for zirconium, hafnium, iron, chromium, tin, hydrogen, nitrogen, carbon, niobium and oxygen. The material shall conform to the required tensile properties such as tensile strength, yield strength and elongation.
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