ASTM B523 / ASME SB523 / Seamless and Welded Zirconium and Zirconium Alloy Tubes supplier & distributor in India

ASTM B-523
SPECIFICATION FOR SEAMLESS AND WELDED ZIRCONIUM AND ZIRCONIUM ALLOY TUBES

1. Scope

1.1 This specification covers three frades of zirconium and zircomium alloy seamless and welded tubes.

1.2 The values stated in inch-pound units are to be regarded as the standard

1.3 The following precautionary caveat pertains only to the test methods portion, Section 13, of this specification : This standard does not purport to address all of the safery problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safery and health practices and determine the applicability of regulatory limitations prior to use.

TABLE1 CHEMICAL REQUIREMENTSA

Element	Composition, %
	UNS Frade Designation
	R60702	R60704	R60705
Zirconium+hafuium, minB	99.2	97.5	95.5
Hafnium, max	4.5	4.5	4.5
Iron + chromiun	0.2 max	0.2 to 0.4	0.2 max
Tin	...	1.0 to 2.0	...
Hydrogen, max	0.005	0.005	0.005
Nitrogen, max	0.025	0.025	0.025
Carbon, max	0.05	0.05	0.05
Nioblum	...	...	2.0 to 3.0
Oxygen, max	0.16	0.18	0.18

ABy agreement between the purchaser and the manufacuturer, analysis may be required and limits established for elements and compounds not specified in the table of chemical composition.
BThe value for zirconium+hafnium, min, is a warranted byt not a measured value.

TABLE2 PERMISSIBLE VARIATION IN PRODUCT ANALYSIS BETWEEN DIFFERENT LABORATORIES

Element	Permissible Variation in Product Analysis, %
Hydrogen	0.02
Nitrogen	0.01
Carbon	0.01
Hafnium	0.1
Iron+chromiun	0.025
Tin	0.05
Niobium	0.05
Oxygen	0.02

TABLE3 TENSILE REQUIREMENTS

	UNS Grade Designation
	R60702	R60704	R60705
Tensile strength min, ksi(MPa)	55(379)	60(413)	80(552)
Yield Strength, min,ksi(MPa)	30(207)	35(241)	55(379)
elongation in 2 in. or 50mm, min, %	16	14	16

TABLE4 PERMISSIBLE VARIATION IN OUTSIDE DIMENSIONS BASED ON INDIVIDUAL MEASUREMENTS

Outside Diameter, in.(mm)	Diameter Tolerance, in (mm)A, B	Permissible VarationC in Wall Thickness, t, %
Under 1(25.4), excl	±0.004(±0.102)	10
1 to 1 1/2(25.4 to 38.1), excl	±0.005(±0.127)	10
1 1/2 to 2(38.1 to 50.8), excl	±0.006(±0.152)	10
2 to 2 1/2(50.8 to 63.5), excl	±0.007(±0.178)	10
2 1/2 to 3 1/2(63.5 to 88.9), excl	±0.010(±0.254)	10

AThese permissible variations in outside diamter apply only to tubes as finished at the mill before subsequent swaging, expanding, bending, polishing, or other fabricating operations.

BOvality is the maximum and minimum outside diameter of a tube measured at any one cross section. if the measurement is made with a ring gage the following formula shall apply: Ovality = specified OD tube+diameter tolerance+0.002 in.(length of fing gage, 1 in)×specified tube OD. CWhen minimum wall tubes are ordered, tolerances are all plus and shall be double the values shown.

TABLE5 STRAIGHTNESS

Length, ft(m)	Maximum Curvature Depth of Arc
Over 3 to 6(0.91 to 1.83), incl	1/8 in.(3.2mm)
Over 6 to 8(1.83 to 2.44). incl	3/16 in.(4.8mm)
Over 8 to 10(2.44 to 3.05), incl	1/4 in.(6.4mm)
Over 10(3.05)	1/4 in./any 10 ft(2.1mm/m)

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