ASTM B550/B550M-01

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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Designation: B 550/B 550M – 01
Standard Specification for
Zirconium and Zirconium Alloy Bar and Wire
This standard is issued under the fixed designation B 550/B 550M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope ingot or powder blend by the same reduction schedule and the
same heat treatment parameters. Unless otherwise agreed
1.1 This specification covers three grades of zirconium and
between manufacturer and purchaser, a lot shall be limited to
zirconium alloy bar and wire.
the product of an 8 h period for final continuous anneal, or to
1.2 Unless a single unit is used, for example corrosion mass
a single furnace load for final batch anneal.
gain in mg/dm , the values stated in either inch-pound or SI
3.2.4 sponge—a lot shall consist of a single blend produced
units are to be regarded separately as standard. The values
at one time.
stated in each system are not exact equivalents; therefore each
3.2.5 weld fittings—definition is to be mutually agreed upon
system must be used independently of the other. SI values
between manufacturer and the purchaser.
cannot be mixed with inch-pound values.
1.3 The following precautionary caveat pertains only to the
4. Classification
test methods portions of this specification. This standard does
4.1 The bar or wire is to be furnished in three grades as
not purport to address all of the safety concerns, if any,
follows:
associated with its use. It is the responsibility of the user of this
4.1.1 Grade R60702—Unalloyed zirconium.
standard to establish appropriate safety and health practices
4.1.2 Grade R60704—Zirconium-tin.
and determine the applicability of regulatory limitations prior
4.1.3 Grade R60705—Zirconium-niobium.
to use.
5. Ordering Information
2. Referenced Documents
5.1 Orders for material under this specification should
2.1 ASTM Standards:
3 include the following information:
E 8 Test Methods for Tension Testing of Metallic Materials
5.1.1 Quantity (weight or number of pieces),
E 29 Practice for Using Significant Digits in Test Data to
4 5.1.2 Name of material (zirconium bar or wire) (Table 1),
Determine Conformance with Specifications
5.1.3 Grade number (see 4.1),
3. Terminology 5.1.4 ASTM designation and year of issue, and
5.1.5 Additions to the specification and supplementary re-
3.1 Definitions of Terms Specific to This Standard:
quirements, if required.
3.1.1 annealed—denotes material that exhibits a recrystal-
lized grain structure.
NOTE 1—A typical ordering description is as follows: 1000 lb (500 kg)
3.2 Lot Definitions:
zirconium cold drawn bar, 0.35 in. (10 mm) in diameter by 10 ft (3 m) in
length, ASTM B 550 dated __, Grade R60702.
3.2.1 castings—a lot shall consist of all castings produced
from the same pour.
6. Materials and Manufacture
3.2.2 ingot—no definition required.
6.1 Bar and wire covered by this specification shall be
3.2.3 rounds, flats, tubes, and wrought powder metallurgical
formed with conventional fabrication methods and equipment
products (single definition, common to nuclear and non-
found in primary ferrous and nonferrous metal plants.
nuclear standards)—a lot shall consist of a material of the
6.2 Bar and wire will be supplied in the conditions pre-
same size, shape, condition, and finish produced from the same
scribed in Table 2.
6.3 The products covered include the sections and sizes
shown in Table 1.
This specification is under the jurisdiction of ASTM Committee B10 on
Reactive and Refractory Metals and Alloys and is the direct responsibility of
7. Chemical Composition
Subcommittee B10.02 on Zirconium and Hafnium.
Current edition approved Nov. 10, 2001. Published January 2002. Originally
7.1 The material shall conform to the requirements as to
published as B 550 – 71. Last previous edition B 550 – 97.
chemical composition prescribed in Table 3.
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
7.2 The manufacturer’s ingot analysis shall be considered
cation SB-550 in Section II of that Code.
Annual Book of ASTM Standards, Vol 03.01.
the chemical analysis for bar and wire, except for hydrogen and
Annual Book of ASTM Standards, Vol 14.02.
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
B 550/B 550M
TABLE 1 Product Sections and Size
Product Section Size
Bars: Hot-finished round, squares, octagons, and hexagons ⁄4 in. (6.4 mm) and over in diameter or size
1 1
Hot-finished flats ⁄4 in. (6.4 mm) to 10 in. (250 mm), incl, in width, and ⁄8
in. (3.2 mm) and over in thickness
A
Cold-finished rounds, squares, octagons, hexagons, and Over ⁄2in. (13 mm) in diameter or size
shapes
B
3 1
Cold-finished flats ⁄8 in. (9.5 mm) and over in width, and ⁄8 in. (3.2 mm)
C
and over in thickness
Wire: Cold-finished rounds, squares, octagons, hexagons, and ⁄2 in. (13 mm) and under in diameter or size
shapes
1 3
Cold-finished flats ⁄16 in. (1.6 mm) to under ⁄8 in. (9.5 mm) in width, and
0.010 in. (.25 mm) to under ⁄16 in. (4.8 mm) in
thickness
A
Sizes ⁄2in. (13 mm) and under are wire when in coils, and cut wire when finished in straight lengths.
B
3 3
Widths less than ⁄8 in. (9.5 mm) and thicknesses less than ⁄16in. (4.8 mm) are generally described as flat wire.
C
1 3
Thickness ⁄8 in. (3.2 mm) to under ⁄16 in. (4.8 mm) can be cold-rolled strip as well as bar.
TABLE 2 Condition
10.2.3 Centerless ground (round bars only), and
Form Condition 10.2.4 Polished (round bars only).
10.3 Bars or wire shall be free of cracks, seams, slivers,
Bars hot finished
hot annealed
blisters, burrs, and other injurious imperfections in accordance
cold finished
with standards of acceptability agreed upon between the
cold finished and annealed
manufacturer and the purchaser.
Wire cold finished
cold finished and annealed
11. Significance of Numerical Limits
11.1 For the purpose of determining compliance with the
nitrogen, which shall be determined on the finished product.
specified limits for requirements of the properties listed in the
7.3 When requested by the purchaser and stated in the
following table, an observed value or a calculated value shall
purchase order, a product analysis for any elements listed in
be rounded as indicated in accordance with the rounding
Table 3 shall be made on the finished product.
methods of Practice E 29.
7.3.1 The manufacturer’s analysis shall be considered as
Rounded Unit for Observed or
verified if the check analysis confirms the manufacturer’s Property Calculated Value
Chemical composition and tolerances nearest unit in the last right-hand
reported values within the tolerances prescribed in Table 4.
(when expressed as decimals) place of figures of the specified limit
Tensile strength and yield strength nearest 1000 psi (10 MPa)
8. Mechanical Properties
Elongation nearest 1 %
8.1 The annealed material shall conform to the requirements
12. Number of Tests and Retests
for mechanical properties, at room temperature, as prescribed
12.1 One longitudinal tension test shall be made from each
in Table 5. Wire supplied for welding applications shall be
lot of bar and rod, see 13.1.
furnished with a temper suitable for uniform feeding in
12.2 One chemistry test for hydrogen and nitrogen content
semiautomatic or automatic welding equipment.
shall be made from each lot of finished product, see 13.2.
9. Permissible Variations in Dimensions
12.3 Retests:
9.1 Unless otherwise specified, all bar or wire shall conform 12.3.1 If any sample or specimen exhibits obvious surface
contamination or improper preparation disqualifying it as a
to the permissible variations in dimensions prescribed in the
applicable Tables 6-14, inclusive. truly representative sample, it shall be discarded and a new
sample or specimen substituted.
10. Workmanship, Finish and Appearance
12.3.2 If the results of any tests of any lot do not conform to
the requirements specified, retests shall be made on additional
10.1 Bars in the hot-finished condition which will conform
samples from the same lot, each of which shall conform to the
to the tolerances prescribed in Tables 6 and 7, shall be
requirements specified.
furnished with one of the following finishes as designated on
the purchase order:
13. Test Methods
10.1.1 Not descaled,
10.1.2 Mechanically descaled, 13.1 Tension Tests—Conduct the tension test in accordance
10.1.3 Mechanically descaled and pickled, and with Test Methods E 8. Determine the yield strength by the
10.1.4 Turned (round bars only). offset (0.2 %) method. Determine the tensile properties using a
10.2 Bars and wire in cold-finished condition, that will strain rate of 0.003 to 0.007 in./in. (mm/mm)/min through the
conform to the tolerances prescribed in Tables 8-12, shall be yield strength. After the yield strength has been exceeded, the
furnished with one of the following finishes as designated on cross-head speed may be increased to approximately 0.05
the purchase order. in./in. (mm/mm)/min to failure.
10.2.1 Cold drawn or cold rolled, or swaged, 13.2 Chemical Tests—Conduct the chemical analysis by the
10.2.2 Turned (round bars only), standard techniques normally used by the manufacturer.
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
B 550/B 550M
A
TABLE 3 Chemical Requirements
Composition, %
Element
Grades R60702 Grades R60704 Grades R60705
Zirconium + hafnium, min 99.2 97.5 95.5
Hafnium, max 4.5 4.5 4.5
Iron + chromium 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
Niobium . . . . . . 2.0 to 3.0
Oxygen, max 0.16 0.18 0.18
A
By agreement between the purchaser and the manufacturer, analysis may be required and limits established for elements and compounds not specified in the table
of chemical composition.
TABLE 4 Permissible Variation in Check Analysis Between
TABLE 7 Dimensional Tolerances in Hot-Rolled Flat Bars
Different Laboratories
A
Variation in Variation in Width,
Permissible Variation in
Thickness, in. (mm)
Element
Thickness, in. (mm) in. (mm)
Product Analysis, %
Up–0.150 (3.8) +0.020 –0 (+0.5) ⁄8 –0 (3.2)
Hydrogen 0.002
Over 0.150–0.250 (3.8–6.3) +0.030 –0 (+0.75) ⁄32 –0 (4.0)
Nitrogen 0.01
Over 0.250–0.350 (6.3–8.9) +0.040 –0 (+1.0) ⁄16 –0 (4.8)
Carbon 0.01
Over 0.350–0.450 (8.9–11.4) +0.050 –0 (+1.3) ⁄32 –0 (5.6)
Hafnium 0.1
B
Over 0.450–0550 (11.4–14) +0.070 –0 (+1.8)
Iron + chromium 0.025
B
Over 0.550–1.500 (14–38) +0.080 –0 (+2.0)
Tin 0.05
BB
Over 1.500 (38)
Niobium 0.05
A
Oxygen 0.02
For bars sheared from plate, width tolerances shall be as follows:
B
Depends on size and quantity ordered.
Width Tolerances, in. (mm)
Specified Thickness, in.
(mm)
A Over Under
TABLE 5 Tensile Requirements
1 1
Over 0.100–0.150 ⁄16 (1.6) ⁄16 (1.6)
Grades
5 5
Over 0.150–0.250 ⁄64 (2.0) ⁄64 (2.0)
R60702 R60704 R60705
3 3
Over 0.250–0.350 ⁄32 (2.4) ⁄32 (2.4)
Tensile Strength, min, ksi (MPa) 55 (380) 60 (415) 80 (550)
7 7
Over 0.350–0.450 ⁄64 (2.8) ⁄64 (2.8)
Yield Strength, min, ksi (MPa) 30 (205) 35 (240) 55 (380)
1 1
Over 0.450–0.550 ⁄8 (3.2) ⁄8 (3.2)
B
Elongation in 2 in. or 50 mm min, % 16 14 16
5 5
Over 0.550–0.650 ⁄32 (4.0) ⁄32 (4.0)
A
For bar only.
B
When a sub-size specimen is used, the gage length shall be as specified in
Test Methods E 8 for the specimen.
TABLE 8 Permissible Variations in Sectional Dimensions for
Cold-Finished Bars in Rounds, Hexagons, Octagons, and
TABLE 6 Dimensional Tolerances for Hot-Finished Rounds,
Squares
Squares, Octagons, and Hexagons
A
Permissible Variation, in. (mm)
Specified Size, in. (mm)
Variation in Out of Round,
Over Under
Specified Size, in. (mm)
Size, in. (mm) Out of Square, in. (mm)
Rounds
Over ⁄2–1, incl (13–25) 0.002 (0.05) 0.002 (0.05)
Up–0.500 (13) +0.030 –0 (+0.75) 0.025 (0.64)
1–1 ⁄2, excl (25–38) 0.0025 (0.06) 0.0025 (0.06)
Over 0.500–1.000 (13–25) +0.050 –0 (+1.3) 0.040 (1)
B
1 ⁄2–4, incl (38–100) 0.003 (0.08) 0.003 (0.08)
Over 1.000–2.000 (25–50) +0.070 –0 (+1.8) 0.060 (1.5)
Hexagons, Octagons, and Squares
Over 2.000-4.000 (50–100) +0.150 –0 (+3.8) 0.080 (2)
Over ⁄2–1, incl (13–25) 0 0.004 (0.10)
Over 4.000–6.000 (100–150) +0.250 –0 (+6.4) 0.100 (2.5)
Over 1–2, excl (25–50) 0 0.006 (0.15)
Over 2–3, incl (50–75) 0 0.008 (0.20)
Over 3 (75) 0 0.010 (0.25)
14. Inspection
A
When it is necessary to heat treat or heat treat and pickle after cold finishing,
14.1 The manufacturer shall inspect the material covered by
because of special hardness or mechanical property requirements, tolerances are
double those shown in the table.
this specification prior to shipment and, on request, shall
B
For permissible variations on sizes over 4 in. (100 mm) the manufacturer
furnish the purchaser with certificates of test. If so specified in
should be consulted.
the purchase order, the purchaser or his representative may
witness the testing and inspection of the material at the place of
ing the purchaser, without charge, all reasonable facilities to
manufacture. In such cases the purchaser shall state in his
satisfy him that the material is being furnished in accordance
purchase order which tests he desires to witness. The manu-
with this specification. This inspection shall be so conducted as
facturer shall give ample notice to the purchaser as to the time
not to interfere unnecessarily with the operation of the works.
and place of the designated tests. If the purchaser’s represen-
tative does not present himself at the time agreed upon for the
15. Rejection
testing, the manufacturer shall consider the requirement for
purchaser’s inspection at the place of manufacture to be 15.1 Rejection for failure of the material to meet the
waived. requirements of this specification shall be reported to the
14.2 The manufacturer shall afford the inspector represent- manufacturer within 60 calendar days from the receipt of the
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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B 550/B 550M
TABLE 9 Permissible Variations in Width and Thickness for TABLE 10 Permissible Variations in Sectional Dimensions for
A
Cold-Finished Bars in Flats Wire
Permissible Variations in Width for Permissible Variation, in. (mm)
...