ASTM A512-96(2001)
(Specification)Standard Specification for Cold-Drawn Buttweld Carbon Steel Mechanical Tubing
Standard Specification for Cold-Drawn Buttweld Carbon Steel Mechanical Tubing
SCOPE
1.1 This specification covers cold-drawn buttweld carbon steel tubes for use as mechanical tubing.
1.2 This specification covers round, square, rectangular, and special shape mechanical tubing.
1.3 Round tube size ranges covered are outside diameters up to 3 1/2 in. (88.9 mm) and wall thickness from 0.035 to 0.500 in. (0.89 to 12.70 mm).
1.4 Optional supplementary requirements are provided and, when desired, shall be so stated in the order.
1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: A 512 – 96 (Reapproved 2001)
Standard Specification for
Cold-Drawn Buttweld Carbon Steel Mechanical Tubing
This standard is issued under the fixed designation A512; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
NOTE 1—The term “weight” is temporarily used in this specification
1. Scope
becauseofestablishedtradeusage.Thewordisusedtomeanboth“force”
1.1 This specification covers cold-drawn buttweld carbon
and “mass,” and care must be taken to determine which is meant in each
steel tubes for use as mechanical tubing.
case (SI unit for force = newton and for mass = kilogram).
1.2 Thisspecificationcoversround,square,rectangular,and
3.1.2 Name of material (buttweld carbon steel mechanical
special shape mechanical tubing.
tubing),
1.3 Roundtubesizerangescoveredareoutsidediametersup
3.1.3 Form (round, square, rectangular, special shape),
to3 ⁄2in.(88.9mm)andwallthicknessfrom0.035to0.500in.
3.1.4 Condition, description and code letters (Section 5),
(0.89 to 12.70 mm).
3.1.5 Grade, if required (Section 6),
1.4 Optional supplementary requirements are provided and,
3.1.6 Dimensions (round, Section 9 or square and rectangu-
when desired, shall be so stated in the order.
lar, Section 10),
1.5 The values stated in inch-pound units are to be regarded
3.1.7 Length (round length, 9.2; square and rectangular
as the standard. The values given in parentheses are for
length, 10.5),
information only.
3.1.8 Burr removal (Section 11),
3.1.9 Report of chemical analysis and products analysis, if
2. Referenced Documents
required,
2.1 ASTM Standards:
3.1.10 Individual supplementary requirements if required
A370 TestMethodsandDefinitionsforMechanicalTesting
(S1 through S5),
of Steel Products
3.1.11 Special requirements,
E59 PracticeforSamplingSteelandIronforDetermination
3.1.12 End use,
of Chemical Composition
3.1.13 Specification designation,
2.2 Military Standards:
3.1.14 Special marking (Section 15), and
MIL-STD-129 Marking for Shipment and Storage
3.1.15 Special packaging (Section 16).
MIL-STD-163 Steel Mill Products Preparation for Ship-
ment and Storage
4. Materials and Manufacture
2.3 Federal Standard:
4.1 The steel shall be made by any process.
Fed. Std. No. 123 Marking for Shipments (CivilAgencies)
4.2 Ifaspecifictypeofmeltingisrequiredbythepurchaser,
it shall be as stated on the purchase order.
3. Ordering Information
4.3 The primary melting may incorporate separate degas-
3.1 Orders for material under this specification should
sing or refining, and may be followed by secondary melting,
include the following, as required, to describe the required
such as electroslag or vacuum-arc remelting. If secondary
material adequately:
melting is employed, the heat shall be defined as all of the
3.1.1 Quantity(feet,weight(Note1),ornumberoflengths),
ingots remelted from a single primary heat.
4.4 Steel may be cast in ingots or may be strand cast.When
steel of different grades is sequentially strand cast, identifica-
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel,
StainlessSteel,andRelatedAlloys,andisthedirectresponsibilityofSubcommittee
tion of the resultant transition material is required. The
A01.09 on Carbon Steel Tubular Products.
producer shall remove the transition material by an established
Current edition approved Oct. 10, 1996. Published November 1997. Originally
procedure that positively separates the grades.
published as A512–64. Last previous edition A512–95.
Annual Book of ASTM Standards, Vol 01.03. 4.5 Tubes shall be made by the furnace buttweld process.
Annual Book of ASTM Standards, Vol 03.05.
4.6 Tubes shall be cold finished, either externally only
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700
(sunk) or externally and internally (mandrel drawn).
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 512 – 96 (2001)
A
TABLE 2 Chemical Requirements for Other Carbon Grades
5. Condition
Grade Chemical Composition Limits, %
5.1 The purchaser shall specify in the order one of the
Desig-
Phospho-
following conditions: B
nation Carbon Manganese Sulfur, max
rus, max
MD (Mandrel Drawn)—No final thermal treatment
1008 0.10 max 0.50 max 0.040 0.045
SD (Sink Drawn)—No final thermal treatment
1010 0.08–0.13 0.30–0.60 0.040 0.045
MDSR—Mandrel Drawn and Stress Relieved
1012 0.10–0.15 0.30–0.60 0.040 0.045
SDSR—Sink Drawn and Stress Relieved 1015 0.12–0.18 0.30–0.60 0.040 0.045
1016 0.12–0.18 0.60–0.90 0.040 0.045
MDSA—MandrelDrawnandSoftAnnealedornormalized
1018 0.14–0.20 0.60–0.90 0.040 0.045
SDSA—Sink Drawn and Soft Annealed or normalized
1019 0.14–0.20 0.70–1.00 0.040 0.045
1020 0.17–0.23 0.30–0.60 0.040 0.045
NORM-MD-SR—Normalized,MandrelDrawn,andStress
1021 0.17–0.23 0.60–0.90 0.040 0.045
Relieved
1025 0.22–0.28 0.30–0.60 0.040 0.045
NORM-SD-SR—Normalized, Sink Drawn, and Stress Re-
1026 0.22–0.28 0.60–0.90 0.040 0.045
lieved 1030 0.27–0.34 0.60–0.90 0.040 0.045
1035 0.31–0.38 0.60–0.90 0.040 0.045
C
1110 0.08–0.15 0.30–0.60 0.040 0.130
6. Chemical Composition
C
1115 0.13–0.20 0.60–0.90 0.040 0.130
C
1117 0.14–0.20 1.00–1.30 0.040 0.130
6.1 The steel shall conform to the requirements as to
A
Rimmed or capped steels which may be used for the above grades are
chemical composition prescribed in Table 1 or Table 2 and
characterized by a lack of uniformity in their chemical composition, and for this
Table 3.
reason product analysis is not technologically appropriate unless misapplication is
6.2 When a grade is ordered under this specification, sup-
clearly indicated.
B
Other analyses are available.
plying an alloy grade that specifically requires the addition of
C
Grades 1110, 1115 and 1117 shall contain 0.08 min % sulfur.
any element other than those listed for the ordered grade in
Table 1 or Table 2 is not permitted.
TABLE 3 Tolerances for Product Analysis for Steels Shown in
Table 1
7. Heat Analysis
Limit, or Maximum Variation, Over Maximum Limit or
Element
7.1 An analysis of each heat of steel shall be made by the
of Specified Under Minimum Limit
Range, %
steel manufacturer to determine the percentages of the ele-
Under min, % Over max, %
ments specified; if secondary melting processes are used, the
Carbon To 0.15, incl 0.02 0.03
heat analysis shall be obtained from one remelted ingot or the
Over 01.5 0.03 0.04
Manganeses To 0.60, incl 0.03 0.03
product of one remelted ingot of each primary melt. The heat
Over 0.60 0.04 0.04
analysis shall conform to the requirements specified, except
Phosphorus . . 0.01
that where the heat identity has not been maintained or where
Sulfur . . 0.01
the analysis is not sufficiently complete to permit conformance
to be determined, the chemical composition determined from a
product analysis made by the tubular manufacturer shall
8.2 The product analysis limits shown for carbon are not
conform to the requirements specified for heat analysis. When
normally applicable to the MT grades.
requested in the order or contract, a report of such analyses
8.3 The number and source of samples for such product
shall be furnished to the purchaser.
analysis shall be based on the individual heat or lot identity of
7.2 A report of this analysis shall be furnished only when
one of the following forms of material.
requested on the order.
8.3.1 Heat Identity Maintained—One product analysis per
heat on either a billet, a length of flat rolled stock, or a tube.
8. Product Analysis
8.3.2 Heat Identity Not Maintained—One product analysis
8.1 When requested on the purchase order, a product analy-
from one tube per 2000 ft (610 m) or less for sizes over 3 in.
sis shall be made by the manufacturer. The chemical compo-
(76.2 mm), or one product analysis from one tube per 5000 ft
sition thus determined shall conform to the requirements
(1524 m) or less for sizes under 3 in. (76.2 mm).
prescribed in Table 1 or Table 2 as modified by Table 3.
8.4 If the original test for product analysis fails, retests of 2
additional billets, 2 lengths of flat rolled stock, or 2 tubes shall
be made. Both retests for the elements in question shall meet
A
TABLE 1 Chemical Requirements
the requirements of this specification; otherwise all remaining
Chemical Composition Limits, %
material in the heat or lot shall be rejected, or at the option of
Grade
Phospho-
Designation the producer, each billet, length, flat rolled stock, or tube may
Carbon Manganese Sulfur, max
rus, max
be individually tested for acceptance.
MT 1010 0.05–0.15 0.30–0.60 0.04 0.045
8.5 Samples for product analysis, except for spectrochemi-
MT 1015 0.10–0.20 0.30–0.60 0.04 0.045
cal analysis, shall be taken in accordance with Practice E59,
MT X 1015 0.10–0.20 0.60–0.90 0.04 0.045
MT 1020 0.15–0.25 0.30–0.60 0.04 0.045
and the composition thus determined shall correspond to the
MT X 1020 0.15–0.25 0.70–1.00 0.04 0.045
requirements in applicable section or table.
A
Rimmed or capped steels which may be used for the above grades are
characterized by a lack of uniformity in their chemical composition, and for this
9. Permissible Variations in Dimensions of Round Tubing
reason product analysis is not technologically appropriate unless misapplication is
clearly indicated. 9.1 Diameter and Wall Thickness:
A 512 – 96 (2001)
TABLE 5 Permissible Variations in Length—Round Tubing
9.1.1 Variations in outside diameter, inside diameter, and
wallthicknessshallnotexceedtheamountsprescribedinTable Lengths 4 ft (1.2 m) and under—up to 2 in. (50.8 6 ⁄32 in. (0.8 mm)
mm) diameter
4.
Lengths 4 ft (1.2 m) and under—over 2 in. (50.8 6 ⁄64 in. (1.2 mm)
9.1.2 These variations apply to round, unannealed, and
mm) diameter
stress-relieved tubing. Lengths 4 ft to 10 ft (1.2 to 3.0 m), incl—up to 2 6 ⁄64 in. (1.2 mm)
in. (50.8 mm) diameter
9.1.3 Diameter tolerance includes ovality.
Lengths 4 ft to 10 ft (1.2 to 3.0 m), incl—over 2 6 ⁄16 in. (1.6 mm)
9.1.4 Sink tubing is normally ordered by outside diameter
in. (50.8 mm) diameter
Lengths 10 ft to 24 ft (3.0 to 7.3 m), incl—all 6 ⁄8 in. (3.2 mm)
and nominal wall. Mandrel-drawn tubing is normally ordered
diameters
byoutsidediameterandinsidediameterandmaybeorderedby
A
Lengths over 24 ft (7.3 m)—all diameters 6 ⁄8 in. (3.2 mm)
outside diameter or inside diameter and wall thickness but not
A
Plus an additional tolerance of 6 ⁄16 (1.6 mm) for each 10 ft (3.0 m) or fraction
by all three dimensions.
over 24 ft (7.3 m).
9.2 Length—Random lengths between acceptable limits
will be furnished, utilizing the full mill length. Tubing will be
cut in half if specified. Full length random tubing will have a 10.2 Corner Radii—The corners of square and rectangular
spread not exceeding 7 ft (2.1 m). Half-length random tubing
tubes shall be slightly rounded inside and slightly rounded
will have a spread not exceeding 4 ft (1.2 m). Not more than
outside consistent with wall thickness. The outside corners
10% of the total footage of a shipment may be furnished in
may be slightly flattened. The radii of corners for square and
lengths shorter than the minimum specified but not less than 6
rectangularcold-finishedbuttweldtubesshallbeinaccordance
ft (1.8 m).
with Table 7. Special radii may be obtained.
9.2.1 Whenspecified,multiplelengthswillbefurnishedand
10.3 Squareness Tolerance—Permissible variations for the
shouldincludeallowancesmadeforthecustomer’scuttingtool
side of square and rectangular tube shall be determined by the
width and grippage. Maximum and minimum lengths may be
following equation:
specifiedwiththeunderstandingthatnotmorethan10%ofthe
6b 5c 30.006,in. ~mm!
total footage in a shipment may be furnished in individual
multiples cut to the customer’s specifications. where:
b = tolerance for out-of-square, and
9.2.2 Variations from the specified length shall not exceed
c = largest external dimensions across flats, in. (mm).
the amounts prescribed in Table 5.
9.3 Straightness:
The squareness of sides is commonly determined by one of
9.3.1 Aroundtubeshallbeconsideredstraightprovidedthat
the following methods.
no 3-ft (0.9-m) section departs from a straight line by more
10.3.1 Asquare, with two adjustable contact points on each
than 0.030 in. (0.76 mm).
arm, is placed on two sides.Afixed feeler gage is then used to
9.3.2 The straightness of round tubes shorter than 3 ft (0.9
measure the maximum distance between the free contact point
m) shall be proportionate to 0.010 in./ft (0.8 mm/m).
and the surface of the tubing.
9.3.3 These straightness tolerances do not apply to soft-
10.3.2 A square, equipped with direct-reading vernier, may
annealed tubing nor to long lengths of small diameter tubing.
be used to determine the angular deviation which, in turn, may
10. Permissible Variations in Dimensions of Square and
be related to distance to inches.
Rectangular Tubing
10.4 Twist Tolerance—Variation in twist for square and
10.1 Outside Dimensions and Wall Thickness—Variations rectangular tubing shall not exceed the amounts prescribed in
Table 8. The twist in square and rectangular tubing may be
in largest outside dimensions across flats and wall thickness
shall not exceed the amounts prescribed in Table 6. measured by holding one end of the tubing on a surface plate
TABLE 4 Diameter and Wall Thickness Tolerances for Round Tubing
Outside Diameter, in. (mm) Inside Diameter, in. (mm) Wall Thickness, %
Outside Diameter Range, in. (mm)
Over Under Over Under Over Under
Sunk
1 A
Up to ⁄2 (12.7), excl 0.004 (0.10) 0 . . . . . . 15 15
A
1 1
⁄2to 1 ⁄2 (12.7 to 38.1), excl 0.005 (0.13) 0 . . . . . . 10 10
A
1 ⁄2 to 3 (38.1 to 76.2), incl 0.010 (0.25) 0 . . . . . . 10 10
Mandrel Drawn
Less than 0.156 (3.96) wall:
1 1 1
Up to ⁄2 (12.7), excl 0.004 (0.10) 0 0 0.010 (0.25) 12 ⁄2 12 ⁄2
B
1 1
⁄2 to 1 ⁄2 (12.7 to 38.1), excl 0.005 (0.13) 0 0 0.005 (0.13) 10 10
0.156 (3.96) wall and over:
B
1 1
⁄2 to 1 ⁄2 (12.7 to 38.1), excl 0.005 (0.13) 0 0 0.005 (0.13) 77
Under 0.156 (3.96) wall:
1 ⁄2 (38.1) and over 0.010 (0.25) 0 . . . 0.010 (0.25) 10 10
0.156 (3.96) wall and over:
1 ⁄2 (38.1) and over 0.010 (0.25) 0 0 0.010 (0.25) 7 7
A
Except at the weld line, where the weld pad may exceed this figure.
B
Tubes with an inside diameter under ⁄2 in. (12.7 mm) may require more than 0.005 in. (0.13 mm) inside diameter tolerance and the producer should be consulted.
A 512 – 96 (200
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