Manufacture of ASTM A453, ASME SA453 Rods, Bars, Bolts, Nuts, Studs, Screws, Fasteners
Manufacturer of ASTM A-453, ASME SA-453 Rod, Bar, Bolt, Nut, Stud, Screw, Fastener
Designation: A 453/A 453M – 04
Standard Specification for
High-Temperature Bolting Materials, with Expansion
Coefficients Comparable to Austenitic Stainless Steels1
This standard is issued under the fixed designation A 453/A 453M; 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.
This standard has been approved for use by agencies of the Department of Defense.
- Scope*
1.1 This specification2 covers four grades of bolting materials
with ten classes of yield strength ranging from 50 to 120
ksi [345 to 827 MPa] for use in high-temperature service such
as fasteners for pressure vessel and valve flanges. The material
requires special processing and is not intended for general
purpose applications. The term “bolting material,” as used in
this specification, covers rolled, forged, or hot-extruded bars;
bolts, nuts, screws, washers, studs, and stud bolts. Headed bolts
and rolled threads may be supplied.
NOTE 1—Other bolting materials are covered by Specification A 193/
A 193M and Specification A 437/A 437M.
1.2 Supplementary Requirement S 1 of an optional nature is
provided. This shall apply only when specified by the purchaser
in the order.
1.3 This specification is expressed in both inch-pound units
and in SI units. However, unless the order specifies the
applicable “M” specification designation (SI units), the material
shall be furnished to inch-pound units.
1.4 The values stated in either inch-pound units or SI units
are to be regarded separately as standard. Within the text, the
SI units are shown in brackets. The values stated in each
system are not exact equivalents; therefore, each system must
be used independently of the other. Combining values from the
two systems may result in nonconformance with the specification. - Referenced Documents
2.1 ASTM Standards: 3
A 193/A 193M Specification for Alloy-Steel and Stainless
Steel Bolting Materials for High-Temperature Service
A 437/A 437M Specification for Alloy-Steel Turbine-Type
Bolting Material Specially Heat Treated for High-
Temperature Service
A 962/A 962M Specification for Common Requirements
for Steel Fasteners or Fastener Materials, or Both, Intended
for Use at Any Temperature from Cryogenic to the Creep
Range
E 139 Test Method for Conducting Creep, Creep-Rupture,
and Stress-Rupture Tests of Metallic Materials
F 1470 Guide for Fastener Sampling for Specified Mechanical
Properties and Performance Inspection - Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 bolting material—this covers rolled, forged, or hotextruded
bars; bolts, nuts, screws, washers, studs, and stud
bolts; and also includes those manufactured by upset heading
or roll threading techniques.
3.1.2 heat-treatment charge—one heat of material heat
treated in one batch. If a continuous operation is used, the
weight processed as a heat-treatment charge shall not exceed
the weights in Table 1.
3.1.3 lot—a lot shall consist of the quantities shown in Table
2. - Ordering Information
4.1 The inquiry and order shall indicate the following:
4.1.1 Quantity (weight or number of pieces),
4.1.2 Description of material (bars, bolts, nuts, etc.),
4.1.3 Grade and class (see Table 3),
4.1.4 Method of finishing (see 6.1),
4.1.5 Type of thread desired (see 6.1.1),
4.1.6 Alternative test method option (see 7.2.4.3),
4.1.7 Bolt shape option, if any,
4.1.8 Thread option, if any,
4.1.9 Test method for surface quality, if any,
4.1.10 Test location option, if any,
4.1.11 Rejection option, if any, and
1 This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
A01.22 on Steel Forgings and Wrought Fittings for Piping Applications and Bolting
Materials for Piping and Special Purpose Applications.
Current edition approved Oct. 1, 2004. Published October 2004. Originally
approved in 1961. Last previous edition approved in 2003 as A 453/A 453M – 03.
2 For ASME Boiler and Pressure Vessel Code Applications see related Specification
SA-453 in Section II of that Code.
3 For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
1
*A Summary of Changes section appears at the end of this standard.
4.1.12 If stress-rupture testing is not required, except for
Grade 660 Class D (see 7.2.1). - Common Requirements
5.1 Material and fasteners supplied to this specification shall
conform to the requirements of Specification A 962/A 962M.
These requirements include test methods, finish, thread dimensions,
marking, certification, optional supplementary requirements,
and others. Failure to comply with the requirements of
Specification A 962/A 962M constitutes nonconformance with
this specification. In case of conflict between the requirements
of this specification and Specification A 962/A 962M, this
specification shall prevail. - Materials and Manufacture
6.1 Finishing Process:
6.1.1 Threads may be performed by machining or rolling.
For Type 1 bolting, threading shall be performed after precipitation
heat treatment. Types M1 and M2 bolting shall have
machine cut threads. For Types 2 R1 and R2, bolting shall have
rolled threads. Types R1 and M1 bolting, threading shall be
performed after precipitation heat treatment. Types R2 and M2
bolting shall be threaded after solution heat treatment but prior
to precipitation heat treatment. When not specified by the
purchaser, the type supplied shall be the option of the manufacturer.
6.2 Heat Treatment—Each grade and class shall be heat
treated as prescribed in Table 4. - Mechanical Properties
7.1 Tension Test:
7.1.1 Requirements—The material in each heat-treatment
charge shall conform to the room-temperature tensile requirements
in Table 5.
7.1.2 Number of Specimens:
7.1.2.1 Heat-Treated Bars—When not more than two sizes
of bars are heat treated in the same load, one tension test shall
be made from each size in each heat of material in the
heat-treatment charge (see 3.1.2). When more than two sizes of
bars are treated in the same charge, one tension test shall be
made from one bar of each of the two largest diameters from
each heat of material in the heat-treating charge.
7.1.2.2 Finished Parts—One tension test shall be made if
the lot consists of parts of the same nominal diameter. If the lot
consists of parts of more than one nominal diameter, one
tension test shall be made from each nominal diameter of each
heat involved in the lot (see Section 3).
7.1.2.3 The diameter range shall be in increments of 1/2 in.
[12.5 mm].
7.2 Stress-Rupture Test:
7.2.1 Requirements—The material shall conform to the
stress-rupture requirements prescribed in Table 6 for design
temperatures above 800 °F [427 °C]. Material not stressrupture
tested shall be permanently stamped NR. Grade 660
Class D does not require stress-rupture and shall be stamped
NR.
7.2.2 The number of specimens shall be the same as the
required number of tension test specimens.
7.2.3 The test location and orientation shall be the same as
that required for the tension test specimens.
7.2.4 Test Method:
7.2.4.1 The rupture test shall be performed in accordance
with Practice E 139.
7.2.4.2 A combination smooth and notched test specimen,
machined to the dimensions prescribed in Fig. 1 and Table 7,
shall be tested in accordance with the stress-rupture requirements
prescribed in Table 6. The test shall be continued to
rupture. The rupture shall occur in the smooth section of the
bar.
7.2.4.3 As an alternative procedure and, when specifically
approved by the purchaser, separate smooth and notched test
specimens, machined from adjacent sections of the same piece,
with gage sections conforming to the respective dimensions of
Table 7, may be tested under the above conditions. The notched
specimen need not be tested to rupture but shall not rupture in
less time than the companion smooth specimen.
7.2.4.4 When the minimum specified time to rupture in
Table 6 has been achieved, incremental loading may be used to
accelerate the time to rupture. At intervals of 8 to 16 h,
preferably 8 to 10 h, the stress shall be increased in increments
of 5000 psi [34.5 MPa]. Rupture location, and elongation
requirements shall be as prescribed in Table 6, 7.2.4.2, and
7.2.4.3.
7.3 Hardness Test:
7.3.1 Requirements—The material shall conform to the
room temperature hardness requirements prescribed in Table 5.
For Grade 660 Class D, in the case of conflict, tensile test
results shall prevail over minimum hardness.
7.3.2 Number of Tests:
7.3.2.1 Bars 2 in. [50 mm] and Over—One test on each
mill-treated length.
7.3.2.2 Bars under 2 in. [50 mm]—One test on at least 10 %
of the mill treated lengths.
7.3.2.3 Fasteners—One test each on two fasteners or on a
sample per Guide F 1470, Table 3, sample size B for each heat
lot, whichever is the larger sample.
7.3.3 Test Locations—The hardness test shall be made at the
center of the cross section for bars up to 1 in. [25 mm] in
diameter, and at the midradius on bars 1 in. [25 mm] and larger
in diameter.
TABLE 1 Continuous Heat-Treatment Charge Sizes
Diameter, in. [mm] Weight, lb [kg]
To 13/4 [44] 3000 [1400]
Over 13/4 [44] to 21/2 [63] 6000 [2700]
Over 21/2 [63] 12000 [5400]
TABLE 2 Lot Sizes
Diameter, in. [mm] Maximum Lot Size, lb [kg]
11/2 [38] and under 200 [90]
Over 11/2 [38] to 13/4 [44], incl 300 [140]
Over 13/4 [44] to 21/2 [63], incl 600 [270]
Over 21/2 [63] 20 pieces
A 453/A 453M – 04
TABLE 3 Chemical Requirements
Grade 660 Grade 651
UNS Number S66286 S63198
Content, %
Product Analysis Variation,
Over or Under, % Content, %
Product Analysis Variation,
Over or Under, %
Carbon 0.08 max 0.01 over 0.28–0.35 0.02
Manganese 2.00 max 0.04 0.75–1.50 0.04
Phosphorus 0.040 max 0.005 over 0.040 max 0.005 over
Sulfur 0.030 max 0.005 over 0.030 max 0.005 over
Silicon 1.00 max 0.05 0.30–0.80 0.05
Nickel 24.0–27.0 0.20 8.0–11.0 0.15
Chromium 13.5–16.0 0.20 18.0–21.0 0.25
Molybdenum 1.00–1.50 0.05 1.00–1.75 0.05
Tungsten … … 1.00–1.75 0.05
Titanium 1.90–2.35 0.05 0.10–0.35 0.05 over
ColumbiumA … … 0.25–0.60 0.05
Aluminum 0.35 max 0.05 over … …
Vanadium 0.10–0.50 0.03 … …
Boron 0.001–0.010 0.0004 under to … …
0.001 over
Copper … … 0.50 max 0.03 over
Grade 662 Grade 665
UNS Number S66220 S66545
Content, %
Product Analysis, Variation
Over or Under, % Content, %
Product Analysis Variation,
Over or Under, %
Carbon 0.08 max 0.01 over 0.08 max 0.01 over
Manganese 0.40–1.00 0.03 1.25–2.00 0.04
Phosphorus 0.040 max 0.005 over 0.040 max 0.005 over
Sulfur 0.030 max 0.005 over 0.030 max 0.005 over
Silicon 0.40–1.00 0.05 0.10–0.80 0.05
Nickel 24.0–28.0 0.20 24.0–28.0 0.20
Chromium 12.0–15.0 0.15 12.0–15.0 0.15
Molybdenum 2.0–3.5 0.10 1.25–2.25 0.10
Titanium 1.80–2.10 0.05 2.70–3.3 0.05
Aluminum 0.35 max 0.05 over 0.25 max 0.05 over
Copper 0.50 max 0.03 over 0.25 max 0.03 over
Boron 0.001–0.010 0.0004 under to 0.01–0.07 0.005
0.001 over
A Or columbium plus tantalum.
TABLE 4 Heat Treatment RequirementsA
Grade Class Solution Treatment Hardening Treatment
660 A 16506 25 °F [900 6 14 °C], hold 2 h, min, and liquid
quench
1325 6 25 °F [720 6 14 °C], hold 16 h, air cool
B 1800 6 25 °F [980 6 14 °C], hold 1 h, min, and liquid
quench
1325 6 25 °F [720 6 14 °C], hold 16 h, air cool
C 1800 6 25 °F [980 6 14 °C], hold 1 h min, and oil quench 1425 6 25 °F [775 6 14 °C] hold 16 h, air cool
1200 6 25 °F [650 6 14 °C] hold 16 h, air cool
D 1650 6 25 °F [900 6 14 °C], hold 2 h min, and liquid
quench or
1800 6 25 °F [980 6 14 °C], hold 1 h min, and liquid
quench
1325 6 25 °F [720 6 14 °C], hold 16 h, air cool
If necessary to achieve properties, second age:
1200 6 25 °F [650 6 14 °C] hold 16 h, air cool
651 A hot-cold worked at 1200 °F [650 °C] min with 15 % min reduction in cross-sectional
area, stress-relief anneal at 1200 °F [650 °C] min or 4 h, min
B hot-cold worked at 1200 °F [650 °C] min with 15 % min reduction of cross-sectional
area, stress-relief anneal at 1350 °F [730 °C] min for 4 h, min
662 A 18006 25 °F [980 6 14 °C], hold 2 h, liquid quench 1350 to 1400 °F [730 to 760 °C], hold 20 h, furnace cool to 12006 25 °F [650 6 14
°C], hold 20 h, air cool
B 1950 6 25 °F [1065 6 14 °C], hold 2 h, liquid quench 1350 to 1400 °F [730 to 760 °C], hold 20 h, furnace cool to 1200 6 25 °F [650 6 14
°C], hold 20 h, air cool
665 A 18006 25 °F [980 6 14 °C], hold 3 h, liquid quench 1350 to 1400 °F [730 to 760 °C], hold 20 h, furnace cool to 12006 25 °F [650 6 14
°C], hold 20 h, air cool
B 2000 6 25 °F [1095 6 14 °C], hold 3 h, liquid quench 1350 to 1400 °F [730 to 760 °C], hold 20 h, furnace cool to 1200 6 25 °F [650 6 14
°C], hold 20 h, air cool
A Times refer to the minimum time material is required to be at temperature.
A 453/A 453M – 04
TABLE 5 Mechanical Property Requirements
Grade Class
Tensile Strength,
min
Yield Strength
(0.2 % Offset), min Elongation in
43 Diam,
min, %
Reduction of
Area, min, %
Brinell Hardness
Number
Approximate Rockwell Hardness,
B and C
ksi MPa ksi MPa min max
660 A, B, and C 130 895 85 585 15 18 248–341 24 HRC 37 HRC
D 130 895 105 725 15 18 248–321 24 HRC 35 HRC
651 A 100 690 70A 485 18 35 217–277 95 HRB 29 HRC
60B 415
B 95 655 60A 415 18 35 212–269 93 HRB 28 HRCC
50B 345
662 A 130 895 85 585 15 18 248–321 24 HRC 35 HRCC
B 125 860 80 550 15 18 248–321 24 HRC 35 HRC
665 A 170 1170 120 830 12 15 311–388 32 HRC 41 HRC
B 155 1070 120 830 12 15 311–388 32 HRC 41 HRC
A Material sizes 3 in. [76 mm] and under in diameter.
B Material sizes over 3 in. [76 mm] in diameter.
C Conversion numbers taken from Specification A 193/A 193M, Table number 2 (austenitic steels); others by interpolation.
TABLE 6 Stress Rupture Requirements
Grade Class
Test
Temperature,
°F [°C]
Stress, min Time to
Rupture,
min, hA
Elongation,
ksi MPa min, %
660 A, B, and C 1200 [650] 56 385 100 5
651 A and B 1200 [650] 40 275 100 5
662 A and B 1200 [650] 55 380 100 5
665 A 1200 [650] 75 515 100 3
B 1200 [650] 70 485 100 5
A The combination bar specimen shown in Fig.number 1 shall be tested
continuously at the temperature and at the minimum stress specified or at a
greater stress and shall rupture in a time not less than that specified.
A 453/A 453M – 04
4 Copyright ASTM International
Reproduced by IHS under license with ASTM Licensee=Dept of Energy /9991702100
No reproduction or networking permitted without license from IHS Not for Resale, 10/05/2005 14:03:49 MDT - Product Marking
8.1 Bolts, Nuts, Screws, Studs, and Steel Bolts—In addition
to the grade and class shown in Table 4, the type designation
(see 6.1.1) shall also appear on all bolting material so processed.
Grade 660 Class D shall be stamped NR in addition to
other required markings. - Keywords
9.1 bolts–steel; fasteners–steel; marking; nuts–steel; precipitation
hardening steels; pressure vessel service; revision
letter; steel bars–alloy; steel bolting material; steel flanges;
steel values; temperature service applications–high; year date
FIG. 1 Combination Smooth-Notch Stress-Rupture Test Specimen
(See Table 6)
TABLE 8 Permissible Variations in Size of Cold-Finished Bars
Specified Size, in. [mm]
Permissible Variations from Specified
Size, in. [mm]A
Over Under
Over 1/2 to 1 [13 to 25], excl 0.002 [0.05] 0.002 [0.05]
1 to 11/2 [25 to 38], excl 0.0025 [0.06] 0.0025 [0.06]
11/2 to 4 [38 to 100], inclB 0.003 [0.08] 0.003 [0.08]
A When it is necessary to heat treat or heat treat and pickle after cold finishing,
because of special hardness or mechanical property requirements, the permissible
variations are generally double those shown in the table.
B For size tolerances of sizes over 4 in. [100 mm], the manufacturer should be
consulted.
A 453/A 453M – 04
SUMMARY OF CHANGES
Committee A01 has identified the location of selected changes to this specification since the last issue,
A 453/A 453M – 03, that may impact the use of this specification. (Approved October 1, 2004)
(1) Added paragraph 7.3.2.3.
Committee A01 has identified the location of selected changes to this specification since the last issue,
A 453/A 453M – 02, that may impact the use of this specification. (Approved October 1, 2003)
(1) Revised 4.1.12, 7.2.1, 7.3.1, and 8.1 to include Grade 660
Class D.
(2) Corrected Hardness to Tensile conversions in Table 5.
TABLE 7 Test Specimen Dimensions
NOTE 1— Surfaces marked8, finish to 8 µin. [0.2 µm] rms or better.
NOTE 2—The difference between dimensions F and D shall not exceed
0.0005 in. [0.01 mm] for specimens 1 or 2. The difference shall not exceed
0.001 in. [0.02 mm] for specimens 3, 4, 5, or 6.
NOTE 3—Taper the gage length G to the center so that the diameter D
at the ends of the gage length exceeds the diameter at the center of the
gage length by not less than 0.0005 in. [0.01 mm] nor more than 0.0015
in. [0.04 mm].
NOTE 4—All sections shall be concentric about the specimen axis
within 0.001 in. [0.02 mm].
NOTE 5—Thread size T shall be equal to or greater than diameter H.
NOTE 6—Dimensions A and B are not specified.
NOTE 7—Length of shoulder C—1/8 + 1 / 32 -0 in. [3.2 + 0.8 mm].
NOTE 8—Length of shoulder E—3/8 + 1/32 -0 in. [10.0 + 0.8 mm].
Specimen
Type
Mid-length
Gage Dia D
and Notch-Root
Dia F
Gage
Length,
G
Shoulder
Diameter,
H
Notch-Root
Radius
Inches
1 0.125 0.5 0.177 0.005
2 0.160 0.65 0.226 0.005
3 0.178 0.75 0.250 0.005
4 0.252 1.0 0.375 0.007
5 0.357 1.5 0.500 0.010
6 0.505 2.0 0.750 0.015
Tolerance 60.001 60.05 60.003 60.0005
Millimetres
7 3.17 12.0 4.5 0.13
8 4.06 17.0 5.5 0.13
9 4.52 20.0 6.5 0.13
10 6.40 25.0 9.5 0.18
11 9.07 40.0 12.0 0.25
12 12.8 50.0 19.0 0.38
Tolerance 60.025 61.3 60.1 60.01
A 453/A 453M – 04
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