Products

Zirconium 702

UNS R06702

Stock program: Available on request

Specification: ASTM B 523 / ASME SB 523

Maximum service temperature: 550°C / 1020°F


Zirconium 702 is a commercially pure zirconium, well known for its immunity to stress corrosion cracking and its resistance to pitting and crevice corrosion. Zirconium is a reactive metal that has a high affinity for oxygen resulting in the formation of a protective oxide layer at room temperature. A heat treating process enhanced this oxide layer, which serves as an excellent bouncing surface against a variety of corrosions in certain aggressive environments. The zirconium is used in applications where even the best stainless steels and nickel alloys are not sufficiently corrosion resistant.


Characteristics

  • Excellent corrosion resistance to organic and mineral acids
  • Good ductility even at cryogenic temperatures
  • Very good resistance to corrosion in strong alkalis
  • High strength capability
  • Low thermal conductivity

Market applications:

  • Chemical engineering
  • (Nuclear) power plants
  • Cooling system parts
  • Heat exchanges
  • Automotive components

Technical details

Technical composition (%)
N
C
O
H
Zr
Hf
Fe + Cr
Zirconium 702 min
-
-
0.16
-
99.2
-
-
  max
0.026
0.060
-
0.006
-
4.6
0.2
Mechanical properties
Zirconium 702
Tensile strenght (mpa, min)
380 - 620
Yield strength (0.2% offset mpa, min)
180 - 250
Elongation (%, min)
18
Density / weight (g / cm3 / kg)
6.5

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