The zirconium & zirconium alloy pipe and tube refer to seamless and welded zirconium & zirconium alloy tubes made to ASTM B523 or seamless and welded zirconium & zirconium alloy pipes made to ASTM B658. The same as Zr & Zr alloy bars & wires, there three grades available: Grade R60702: unalloyed zirconium, Grade R60704: zirconium-tin alloy, Grade R60705: zirconium-niobium alloy.

Seamless zirconium & zirconium alloy pipes or tubes may be cold drawn or hot rolled, supplied in annealed condition. Welded zirconium & zirconium alloy pipes or tubes shall be made from ASTM B551 strips, sheets or plates by automatic arc-welding process, furnished with stress-relieving & annealing heat treatment. Specification of Zr & Zr alloy pipes & tubes available with Metals-Piping: size from 1/2″ to 12″, wall thickness covering SCH 5S, SCH 10S, SCH 40S, SCH 80S.

Chemical Composition Requirements

Element	ASTM B523 / B658 Seamless & Welded Pipe and Tubes
	R60702	R60704	R60705
Zirconium(+Hf)	≥99.2	≥97.5	≥95.5
Hafnium	≤4.5	≤4.5	≤4.5
Iron+Chromium	≤0.2	0.2~0.4	≤0.2
Tin	-	1.0~2.0	-
Hydrogen	≤0.005	≤0.005	≤0.005
Nitrogen	≤0.025	≤0.025	≤0.025
Carbon	≤0.05	≤0.05	≤0.05
Niobium	-	-	2.0~3.0
Oxygen	≤0.16	≤0.18	≤0.18

*All values are in weight percentage. Applicable for both ASTM B523 & B658.

Mechanical Properties Requirements

ASTM B550/B658	Tensile Strength, min.		Yield Strength, min.		Elongation
Grade	ksi	MPa	ksi	MPa	min. %
R60702	55	380	30	205	16
R60704	60	415	35	240	14
R60705	80	550	55	380	16

*Applicable for both ASTM B523 & B658, testing at room temperature.

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