For welding – zirconium and zirconium alloy wire

Brand:ERZr2
ERZr4
Size:Φ(0.5-6)✕ Lmm
Shape:Straight wire;Wire rod
Standard: AWS A5.24/A5.24M:2005
ASME SFA-5.24/SFA-5.24M
Chemical composition%

AWS category Brand Zr+Hf Hf(max) Fe+Cr(max) O H(max) N(max) C(max) Nb
ERZr2 R60702 ≥99.0 4.5 0.2 0.11-0.15 0.005 0.015 0.03 /
ERZr4 R60705 ≥95.5 4.5 0.2 0.11-0.16 0.005 0.015 0.03 2.0-3.0

Zirconium wire for plasma cutting or evaporation

Brand:R60702
Size:Φ(0.5-6)✕ Lmm
Shape:Particle;Wire rod
Standard: ASTM B550/B550M-07(2012)
GB/T 8769-2010
Chemical composition%

Brand Zr+Hf Hf(max) Fe+Cr(max) O(max) H(max) N(max) C(max)
R60702 ≥99.2 4.5 0.2 0.16 0.005 0.025 0.05

1. The corrosion rate of industrial pure zirconium in all boiling concentrations of hydrochloric acid is less than 0.025mm/a.

Table 1 comparison of corrosion rates of zirconium and other metallic materials in 20% hydrochloric acid

material The experimental time/h Corrosion rate
zirconium 28 0.018
304 0.5 >8890
316 0.5 1145
B-2 28 0.43
C-276 28 0.9

2. Zirconium has excellent corrosion resistance in sulfuric acid with a concentration of less than 70%.In addition, because stainless steel and nickel alloy can not be used in high temperature, 20% sulfuric acid and 40-60% of the boiling temperature of sulfuric acid range, zirconium in sulfuric acid environment has an irreplaceable role.

Table 2 comparison of corrosion rates between zirconium and stainless steel and nickel alloys

H₂SO₄Percent content centigrade temperature corrosion rate(mm/a)
Zr 304 316 B-2 C-276
10 102 0.0025 52 14.2 0.025 0.018
30 108 0.0025 >127 >127 0.053 1.4
55 132 0.0025 >104 >104 0.048 7.5
55 168 0.5 / / 0.94 54
2 225 0 / / 0.38 1
5 232 0.0025 / / 2.8 3.9
10 225 0.018 / / 26 16.8
15 225 0.06 / / / /

3.below 200℃, not more than 90% of nitric acid, zirconium has good corrosion resistance.

4.Zirconium is more resistant to corrosion in all concentrations, even boiling caustic solutions, than tantalum, niobium, and titanium

 

Crystallization of hafnium

Crystalline hafnium is a high purity hafnium produced by iodization

Purity Hf+Zr≥99.99%, diameter 20-40mm.The length can be cut according to customer’s request

Chemical composition                
Element Fe Cr Mo Al Ti Mn Ni U
Max(ppm) 100 5 10 5 10 5 12 1
Element Cu Sn Sb W Pb Bi Mg P
Max(ppm) 5 5 5 5 5 5 5 5
Element Si S Nb B Cd Be Ca Li
Max(ppm) 10 5 5 5 1 5 5 5
Element Zn Na V K N C H O
Max(ppm) 5 5 5 5 50 50 20 100
Element Zr
Max(ppm) Zr≤0.2% or Zr≤0.3% or Zr≤0.5% 

 

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