ASTM B818-98a

Standard Specification for Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy (UNS R31233) Plate, Sheet and Strip

SCOPE
1.1 This specification covers cobalt-chromium-nickel-molybdenum-tungsten alloy UNS R31233 in the form of rolled plate, sheet, and strip for wear applications and general corrosion service.
1.2 The following products are covered under this specification:
1.2.1 Sheet and Strip -Hot or cold rolled, annealed and descaled unless solution-annealing is performed in an atmosphere yielding a bright finish.
1.2.2 Plate -Hot rolled, solution-annealed, and descaled.
1.3 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

• Status: Historical
• Publication Date: 31-Dec-1992
• ICS: 77.150.70 - Cadmium and cobalt products
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.07 - Refined Nickel and Cobalt and Their Alloys

Relations

• Replaced By: ASTM B818-03 - Standard Specification for Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy (UNS R31233) Plate, Sheet and Strip
• Effective Date: 10-Jun-2003
• Referred By: ASTM B906-22 - Standard Specification for General Requirements for Flat-Rolled Nickel and Nickel Alloys Plate, Sheet, and Strip
• Effective Date: 01-Jan-1993

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: B 818 – 98a
Standard Specification for
Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy (UNS
R31233) Plate, Sheet and Strip
This standard is issued under the fixed designation B 818; 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 4. Ordering Information
1.1 This specification covers cobalt-chromium-nickel- 4.1 It is the responsibility of the purchaser to specify all
molybdenum-tungsten alloy UNS R31233 in the form of rolled requirements that are necessary for the safe and satisfactory
plate, sheet, and strip for wear applications and general performance of material ordered under this specification.
corrosion service. Examples of such requirements include, but are not limited to,
1.2 The following products are covered under this specifi- the following:
cation: 4.1.1 Alloy.
1.2.1 Sheet and Strip—Hot or cold rolled, annealed and 4.1.2 Dimensions—Thickness (in decimals of an inch),
descaled unless solution-annealing is performed in an atmo- width, and length (inch or fraction of an inch).
sphere yielding a bright finish. 4.1.3 Certification—State if a report of test results is re-
1.2.2 Plate—Hot rolled, solution-annealed, and descaled. quired (see Section 15).
1.3 The values stated in inch-pound units are to be regarded 4.1.4 Optional Requirement—Plate; state how plate is to be
as the standard. The values given in parentheses are for cut (see 7.7.1 and Table 1).
information only. 4.1.5 Purchase Inspection—State which tests or inspections
are to be witnessed (see Section 13).
2. Referenced Documents
4.1.6 Samples, for Product (Check) Analysis—State
2.1 ASTM Standards: whether samples should be furnished (see 9.2.2).
B 880 Specification for General Requirements for Chemical
5. Chemical Composition
Check Analysis Limits for Nickel, Nickel Alloys, and
Cobalt Alloys 5.1 The material shall conform to the requirements as to
E 8 Test Methods for Tension Testing of Metallic Materials chemical composition prescribed in Table 2.
E 29 Practice for Using Significant Digits in Test Data to 5.2 If a product (check) analysis is made by the purchaser,
Determine Conformance with Specifications the material shall conform to the requirements specified in
E 55 Practice for Sampling Wrought Nonferrous Metals and Table 2 subject to the permissible tolerances per B 880.
Alloys for Determination of Chemical Composition
6. Mechanical Properties and Other Requirements
E 1473 Test Methods for Chemical Analysis of Nickel,
Cobalt, and High-Temperature Alloys 6.1 Tensile Properties—The material shall conform to the
room temperature tensile properties prescribed in Table 3.
3. Terminology
7. Dimensions, Mass, and Permissible Variations
3.1 Definitions of Terms Specific to This Standard:
7.1 Thickness:
3.1.1 plate—material ⁄16 in. (4.76 mm) and over in thick-
ness. 7.1.1 Plate—The permissible variations in thickness of
plate shall be as prescribed in Table 4.
3.1.2 sheet and strip—material under ⁄16in. (4.76 mm) in
thickness. 7.1.2 Sheet and Strip—The permissible variations in thick-
ness of sheet and strip shall be as prescribed in Table 5. The
thickness shall be measured with the micrometer spindle ⁄8 in.
This specification is under the jurisdiction of ASTM Committee B-2 on
(9.525 mm) or more from any edge for material 1 in. (25.4
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys. mm) or over in width and at any place on material under 1 in.
Current edition approved Oct. 10, 1998. Published November 1998. Originally
in width.
published as B 818 – 91. Last previous edition B 818 – 98.
7.2 Width:
Annual Book of ASTM Standards, Vol 02.04.
7.2.1 Plate—The permissible variations in width of rectan-
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 14.02.
gular plates shall be as prescribed in Table 6.
Annual Book of ASTM Standards, Vol 03.05.
7.2.2 Sheet and Strip—The permissible variations in width
Annual Book of ASTM Standards, Vol 03.06.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
B 818
TABLE 1 Permissible Variations in Width of Sheet and Strip
Permissible Variations in Specified
Specified Thickness, Specified Width, Width,
in. (mm) in. (mm) in. (mm)
+−
Sheet
0.187 (4.75) and under 2 (50.8) and over 0.125 (3.18) 0
Strip (Slit Edges)
Over 0.020 to 0.075 (0.51 to 1.90), incl 24 (610) and under 0.007 (0.18) 0.007 (0.18)
Over 0.075 to 0.100 (1.90 to 2.54), incl 24 (610) and under 0.009 (0.23) 0.009 (0.23)
Over 0.100 to 0.125 (2.54 to 3.18), incl 24 (610) and under 0.012 (0.30) 0.012 (0.30)
A
TABLE 2 Chemical Requirements TABLE 5 Permissible Variations in Thickness of Sheet and Strip
Element Composition Limits, % Permissible Variations in
Thickness,
Specified Thickness,
Boron 0.015 max
B,C
in. (mm) (All Widths)
in. (mm)
Carbon 0.02–0.10
Chromium 23.5–27.5 +−
Iron 1.0–5.0
0.020 to 0.034 (0.51 to 0.86), incl 0.004 (0.10) 0.004 (0.10)
Manganese 0.1–1.5
Over 0.034 to 0.056 (0.86 to 1.42), incl 0.005 (0.13) 0.005 (0.13)
Molybdenum 4.0–6.0
Over 0.056 to 0.070 (1.42 to 1.78), incl 0.006 (0.15) 0.006 (0.15)
Nitrogen 0.03–0.12
Over 0.070 to 0.078 (1.78 to 1.98), incl 0.007 (0.18) 0.007 (0.18)
Nickel 7.0–11.0
Over 0.078 to 0.093 (1.98 to 2.36), incl 0.008 (0.20) 0.008 (0.20)
Phosphorous 0.030 max
Over 0.093 to 0.109 (2.36 to 2.77), incl 0.009 (0.23) 0.009 (0.23)
Sulfur 0.020 max
Over 0.109 to 0.125 (2.77 to 3.18), incl 0.010 (0.25) 0.010 (0.25)
Silicon 0.05–1.00
Over 0.125 to 0.140 (3.18 to 3.56), incl 0.013 (0.33) 0.010 (0.25)
Tungsten 1.0–3.0
Over 0.140 to 0.171 (3.56 to 4.34), incl 0.016 (0.41) 0.010 (0.25)
A
Cobalt Remainder
Over 0.171 to 0.187 (4.34 to 4.75), incl 0.018 (0.46) 0.010 (0.25)
A
See 12.1.1.
A
Applicable to sheet 48 in. (1219 mm) and under in width.
B
Measured ⁄8 in. (9.525 mm) or more from any edge.
C
Buffing for removal of light surface imperfections shall be permitted. The depth
TABLE 3 Mechanical Property Requirements
of such buffed areas shall not exceed the permissible minus variation.
Tensile Strength, min, ksi (MPa) 130 (896)
Yield Strength, min, ksi (MPa) 55 (379)
A
Elongation in 2 in. (50.8 mm) or 4D min % 15 TABLE 6 Permissible Variations in Width and Length of Sheared,
Plasma-Torch-Cut, or Abrasive Cut Rectangular Plate
A
D refers to the diameter of the tension specimen.
Permissible Variations in Widths and Lengths for
Dimensions Given, in. (mm)
A
TABLE 4 Permissible Variations in Thickness of Plate
Specified Thickness
Up to 30 (760), incl Over 30 (760)
Permissible Variations in
Thickness, +− + −
Specified Thickness,
BC
in. (mm)
in. (mm)
inches
+−
Sheared:
3 7 3 5 3 1 1 1
⁄16 to ⁄16, excl ⁄16 ⁄8 ⁄4 ⁄8
⁄16 to ⁄32 (4.762 to 5.556), incl 0.021 (0.53) 0.010 (0.25)
5 1 1 1 3 1
7 1
⁄16 to ⁄2, incl ⁄4 ⁄8 ⁄8 ⁄8
Over ⁄32 to ⁄4 (5.556 to 6.350), incl 0.024 (0.61) 0.010 (0.25)
1 3
Abrasive cut:
Over ⁄4 to ⁄8 (6.350 to 9.525), incl 0.027 (0.69) 0.010 (0.25)
3 1 1 1 1 1
3 1
⁄16 to 1 ⁄2, incl ⁄16 ⁄16 ⁄16 ⁄16
Over ⁄8 to ⁄2 (9.525 to 12.70), incl 0.030 (0.76) 0.010 (0.25)
1 5 1 1 1 1 1 1
Over 1 ⁄2 to 2 ⁄2, incl ⁄8 ⁄8 ⁄8 ⁄8
Over ⁄2 to ⁄8 (12.70 to 15.88), incl 0.035 (0.89) 0.010 (0.25)
A
5 3
Plasma-torch-cut:
Over ⁄8 to ⁄4 (15.88 to 19.05), incl 0.040 (1.02) 0.010 (0.25)
3 7 3 1 1
Over ⁄4 to ⁄8 (19.05 to 22.25), incl 0.045 (1.14) 0.010 (0.25) ⁄16 to 2, excl ⁄2 0 ⁄2 0
1 3
2 to 3, incl ⁄8 0 ⁄8 0
Over ⁄8 to 1 (22.22 to 25.4), incl 0.050 (1.27) 0.010 (0.25)
D
Over1to2 ⁄2 (25.4 to 63.5), incl 5 0.010 (0.25)
millimetres
A
Applicable to plate 48 in. (1219 mm) and under in width.
Sheared:
B
Measured ⁄8 in. (9.525
...