ASTM B670 – 95

Designation: B 670 – 9502 Standard Specification for Precipitation-Hardening Nickel Alloy (UNS N07718) Plate, Sheet, and Strip for High-Temperature Service1 This standard is issued under the fixed designation B 670; 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 1.1 This specification covers rolled precipitation hardenable nickel alloy (N07718)* plate, sheet, and strip in the annealed condition (temper). 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety Data Sheet for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents 2.1 ASTM Standards: 1 This specification is under the jurisdiction of ASTM Committee B-2 B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.07 on Refined Nickel and Cobalt, and Alloys Containing Nickel or Cobalt, or Both, as Principal Constituents. Their and Alloys. Current edition approved Aug. 15, 1995. May 10, 2002. Published October 1995. July 2002. Originally published as A 670 – 72. Redesignated B 670 in 1978. Last previous edition B 670 – 945. * New designation established in accordance with ASTM E 527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS). 1 This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version of the standard as published by ASTM is to be considered the official document. Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. B 637 Specification for Precipitation-Hardening Nickel Alloy Bars, Forgings, and Forging Stock for High-Temperature Service2 E 8 Test Methods B 880 Specification for Tension Testing of Metallic Materials General Requirements for Chemical Check Analysis Limits for Nickel, Nickel Alloys and Cobalt Alloys3 E 29 Practice 8 Test Methods for Using Significant Digits in Test Data to Determine Conformance with Specifications Tension Testing of Metallic Materials4 E 38 Methods 29 Practice for Chemical Analysis of Nickel-Chromium and Nickel-Chromium-Iron Alloys Using Significant Digits in Test Data to Determine Conformance with Specifications5 E 139 Practice 139 Test Methods for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials4 E 354 Test Methods for Chemical Analysis of High-Temperature, Electrical, Magnetic, and Other Similar Iron, Nickel, and Cobalt Alloys3 E 1473 Test Methods for Chemical Analysis of Nickel, Cobalt, and High-Temperature Alloys 3 3. Terminology 3.1 Description of Terms Specific to This Standard—The terms given in Table 1 shall apply. 4. Ordering Information 4.1 OIt is the rdesponsibility of the purchaser to specify all requirements that are necessary for material under ordered to this specification sh. Examplles of such requirements include, but are not limited to, the following information: following: 4.1.1 Alloy—Name or UNS number (see Table 2). 4.1.2 ASTM designation, including year of issue. 4.1.3 Condition—See 6.1 and Appendix X1. 4.1.4 Finish—Appendix X1. 4.1.5 Dimensions—Thickness, width, and length. 4.1.6 Quantity: 4.1.7 Optional Requirements: 4.1.7.1 Sheet and Strip—Whether to be furnished in coil, in cut straight lengths, or in random straight lengths. 4.1.7.2 Strip—Whether to be furnished with commercial slit edge, square edge, or round edge. 4.1.7.3 Plate—Whether to be furnished specially flattened (see 7.7.1); also how plate is to be cut (see 7.2.1 and 7.3.2). 4.1.8 Fabrication Details—Not mandatory but helpful to the manufacturer: 4.1.8.1 Welding or Brazing—Process to be employed. 4.1.8.2 Plate—Whether material is to be hot-formed. 4.1.9 Certification—State if certification or a report of test results is required (see Section 15). 4.1.10 Samples for Product (Check) Analysis—Whether samples should be furnished (see 5.2). 4.1.11 Purchaser Inspection—If the purchaser wishes to witness the tests or inspection of material at the place of manufacture, the purchase order must so state indicating which tests or inspections are to be witnessed (see Section 13). 2 Annual Book of ASTM Standards, Vol 02.04. 3 Annual Book of ASTM Standards, Vol 03.015. 4 Annual Book of ASTM Standards, Vol 14.02. 03.01. 5 Discontinued; see 1989 Annual 5 Annual Book of ASTM Standards, Vol 03.05. 14.02. TABLE 1 Product Description Product Thickness, in. (mm) Width Hot-rolled plateA 3⁄16 to 21⁄4 (4.8 to 57.2) (Table 5) Tables 7B and 8 Cold-rolled sheetC 0.010 to 0.250 (0.25 to 6.4), incl (Table 6) Table 9 0.005 to 0.250 (0.13 to 6.4), incl (Table 6) Cold-rolled stripC Table 9 AMaterial 3⁄16 to 1⁄4 in. (4.8 to 6.4 mm), incl, in thickness may be furnished as sheet or plate provided the material meets the specification requirements for the condition ordered. BHot-rolled plate, in widths 10 in. (250 mm) and under, may be furnished as hot-finished rectangles with sheared or cut edges in accordance with Specification B 637, UNS N07718, provided the mechanical property requirements of this specification are met. CMaterial under 48 in. (1219 mm) in width may be furnished as sheet or strip provided the material meets the specification requirements for the condition ordered. B 670 – 9502 2 5. Chemical Composition 5.1 The material shall conform to the requirements as to chemical composition prescribed in Table 2. 5.2 If a product (check) analysis is performed by the purchaser, the material shall conform to the product (check) analysis variations prescribed in Table 2. Specification B 880. 6. Mechanical and Other Requirements 6.1 Tensile Properties—The material after precipitation hardening shall conform to the tensile properties prescribed in Table 3. 6.2 Stress-Rupture Properties—The material after precipitation hardening shall conform to the stress-rupture properties prescribed in Table 4. 7. Dimensions and Permissible Variations 7.1 Thickness and Weight: TABLE 2 Chemical Composition Element Composition,%Product (Check) Analysis Variations, under min or over max, of the Speci- fied Limit of Element Carbon 0.08 max0.01 Carbon 0.08 max Manganese 0.35 max0.03 Manganese 0.35 max Silicon 0.35 max0.03 Silicon 0.35 max Phosphorus 0.015 max 0.005 Phosphorus 0.015 max Sulfur 0.015 max 0.003 Sulfur 0.015 max Chromium 17.0 to 21.00.25 Chromium 17.0 to 21.0 CobaltA 1.0 max0.03 CobaltA 1.0 max Molybdenum 2.80 to 3.300.10 Molybdenum 2.80 to 3.30 Columbium (Nb) + tantalum 4.75 to 5.500.20 Columbium (Nb) + tantalum 4.75 to 5.50 Titanium 0.65 to 1.150.05 Titanium 0.65 to 1.15 Aluminum 0.20 to 0.800.10 Aluminum 0.20 to 0.80 IronB remainder... IronB remainder Copper 0.30 max0.03 Copper 0.30 max Nickel 50.0 to 55.00.35 Nickel 50.0 to 55.0 Boron 0.006 max 0.002 Boron 0.006 max AIf determined. BIron shall be determined arithmetically by difference. TABLE 3 Tensile Properties for Plate, Sheet, and StripA Nominal Thickness, in. (mm) Tensile Strength min, ksi (MPa) Yield Strength (0.2 % offset), min, ksi (MPa) Elongation in 2 in. or 50 mm (or 4D), min, % Up to 1.0 (25.4), incl 180 (1241) 150 (1034) 12 Over 1.0 to 2.25 (25.4 to 57.2), incl 180 (1241) 150 (1034) 10 AMaterial shall be supplied in the annealed condition (temper). The manufac- turer shall demonstrate that annealed material is capable of meeting the properties prescribed in Table 3 after precipitation heat treatment. Precipitation heat treat- ment shall consist of heating to 1325 625°F (718 614°C), hold at temperature for 8 h, furnace cool to 1150 625°F (621 614°C), hold until total precipitation heat treatment time has reached 18 h, and then air cool. B 670 – 9502 3 7.1.1 Plate—The permissible variation under the specified thickness and permissible excess in overweight shall not exceed the amounts prescribed in Table 5. 7.1.1.1 For use with Table 5, plate shall be assumed to weigh 0.296 lb/in.3(8.19 g/cm3). 7.1.2 Sheet and Strip—The permissible variations in thickness of sheet and strip shall be as prescribed in Table 6. The thickness of strip and sheet shall be measured with the micrometer spindle 3⁄8 in. (9.5 mm) or more from either edge for material 1 in. (25.4 mm) or over in width and at any place on the strip under 1 in. in width. 7.2 Width or Diameter: 7.2.1 Plate—The permissible variations in width of rectangular plates and diameter of circular plates shall be as prescribed in Table 7 and Table 8. 7.2.2 Sheet and Strip—The permissible variations in width for sheet and strip shall be as prescribed in Table 9. 7.3 Length: 7.3.1 Sheet and strip of all sizes may be ordered to cut lengths, in which case a variation of 1⁄8 in. (3.2 mm) over the specified length shall be permitted. 7.3.2 Permissible variations in length of rectangular plate shall be as prescribed in Table 10. 7.4 Straightness: 7.4.1 The edgewise curvature (depth of chord) of flat sheet, strip, and plate shall not exceed 0.05 in. multiplied by the length of the product in feet (0.04 mm multiplied by the length of the product in centimetres). TABLE 4 Stress-Rupture Test at 1200°F (649°C) for Plate, Sheet, and StripA Nominal Thickness, in. (mm) Stress,B ksi (MPa) Life, min, h Elongation in 2 in. or 50 mm (or 4D), min, % Up to 0.015 (0.38), incl 95 (655) 23 ... Over 0.015 to 0.025 (0.38 to 0.64), incl 95 (655) 23 4 Over 0.025 to 1.5 (0.64 to 38.1), incl 100 (690) 23 4 AMaterial shall be supplied in the annealed condition (temper). The manufac- turer shall demonstrate that annealed material is capable of meeting the properties prescribed in Table 4 after precipitation heat treatment. Precipitation heat treat- ment is as specified in footnote A of Table 3. BTesting may be conducted at a stress higher than that specified but stress shall not be changed while test is in process. Time to rupture and elongation require- ments shall be as specified in Table 4. Testing may also be conducted using incremental loading. In such case, the stress specified in Table 4shall be maintained to rupture or for 48 h, whichever occurs first. After the 48 h and at intervals of 8 to 16 h, preferably 8 to 10 h, thereafter, the stress shall be increased in increments of 5000 psi (34.5 MPa). Time to rupture and elongation requirements shall be as specified in Table 4. TABLE 5 Permissible Variations in Thickness and Overweight of Rectangular Plates NOTE 1—All plates shall be ordered to thickness and not to weight per square foot (centimetre). No plates shall vary more than 0.01 in. (0.25 mm) under the thickness ordered, and the overweight of each lotA in each shipment shall not exceed the amount in the table. Spot grinding is permitted to remove surface imperfections, such spots not to exceed 0.01 in. (0.25 mm) under the specified thickness. Specified Thickness, in. (mm) Permissible Excess in Average WeightB,C per Square Foot of Plates for Widths Given in Inches (Millimetres) Expressed in Percentage of Nominal Weights Under 48 (1220) 48 to 60 (1220 to 1520), excl 60 to 72 (1520 to 1830), excl 72 to 84 (1830 to 2130), excl 84 to 96 (2130 to 2440), excl 96 to 108 (2440 to 2740), excl 108 to 120 (2740 to 3050), excl 120 to 132 (3050 to 3350), excl 132 to 144 (3350 to 3660), excl 144 to 160 (3660 to 4070), incl 3⁄16 to 5⁄16 (4.8 to 7.9), excl 9.0 10.5 12.0 13.5 15.0 16.5 18.0 ... ... ... 5⁄16 to 3⁄8 (7.9 to 9.5), excl 7.5 9.0 10.5 12.0 13.5 15.0 16.5 18.0 ... ... 3⁄8 to (9.5 to 11.1), excl 7.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5 18.0 19.5 7⁄16 to 1⁄2 (11.1 to 12.7), excl 6.0 7.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5 18.0 1⁄2 to 5⁄8 (12.7 to 15.9), excl 5.0 6.0 7.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5 5⁄8 to 3⁄4 (15.9 to 19.1), excl 4.5 5.5 6.0 7.0 7.5 9.0 10.5 12.0 13.5 15.0 3⁄4 to 1 (19.1 to 25.4), excl 4.0 4.5 5.5 6.0 7.0 7.5 9.0 10.5 12.0 13.5 1 to 21⁄4 (25.4 to 57.2), incl 5.0 5.0 5.5 6.5 7.0 8.0 8.5 10.0 11.5 13.0 AThe term “lot” applied to this table means all of the plates of each group width and each group thickness. BThe permissible overweight for lots of circular and sketch plates shall be 25 % greater than the amounts given in this table. CThe weight of individual plates shall not exceed the nominal weight by more than 11⁄4 times the amount given in this table and Footnote B. B 670 – 9502 4 7.4.2 Straightness for coiled strip material is subject to agreement between the manufacturer and the purchaser. 7.5 Edges: 7.5.1 When finished edges of strip are specified in the contract or purchase order, the following descriptions shall apply: 7.5.1.1 Square-edge strip shall be supplied with finished edges, with sharp, square corners, and without bevel or rounding. 7.5.1.2 Round-edge strip shall be supplied with finished edges, semicircular in form, and the diameter of the circle forming the edge being equal to the strip thickness. 7.5.1.3 When no description of any required form of strip edge is given, it shall be understood that edges such as those resulting from slitting or shearing will be acceptable. 7.5.1.4 Sheet shall have sheared or slit edges. 7.5.1.5 Plate shall have sheared or cut (machined, abrasive-cut, powder-cut, or inert-arc-cut) edges, as specified. 7.6 Squareness (Sheet)—For sheets of all thicknesses, the angle between adjacent sides shall be 90 60.15° (1⁄16 in. in 24 in.) (1.6 mm in 610 mm). 7.7 Flatness—Standard flatness tolerances for plate shall conform to the requirements prescribed in Table 11. “Specially flattened” plate when so specified, shall have permissible variations in flatness as agreed upon between the manufacturer and the purchaser. 8. Workmanship, Finish, and Appearance 8.1 The material shall be uniform in quality and temper, smooth, commercially straight or flat, and free of injurious imperfections. 9. Sampling 9.1 Lot—Definition: 9.1.1 A lot for chemical analysis shall consist of one heat. 9.1.2 A lot for tension and stress-rupture testing shall consist of all material from the same heat, nominal thickness, and condition. 9.1.2.1 Where material cannot be identified by heat, a lot shall consist of not more than 500 lb (227 kg) of material in the same thickness and condition, except for plates weighing over 500 lb, in which case only one specimen shall be taken. 9.2 Test Material Selection: 9.2.1 Chemical Analysis—Representative samples shall be taken during pouring or subsequent processing. 9.2.1.1 Product (Check) Analysis shall be wholly the responsibility of the purchaser. 9.2.2 Tension and Stress-Rupture Testing—Samples of the material to provide test specimens for tension and stress-rupture testing shall be taken from such locations in each lot as to be representative of that lot. TABLE 6 Permissible Variations in Thickness of Sheet and Strip (Permissible Variations, Plus and Minus, in Thickness, in. (mm), for Widths Given in in. (mm)) Sheet Specified Thickness, in. (mm) Hot-Rolled Cold-Rolled 48 (1220) and UnderA Over 48 to 60 (1220 to 1520), inclA 48 (1220) and Under Over 48 to 60 (1220 to 1520), inclA 0.018 to 0.025 (0.46 to 0.64), incl 0.003 (0.08) 0.004 (0.10) 0.002 (0.05) 0.003 (0.08) Over 0.025 to 0.034 (0.64 to 0.86), incl 0.004 (0.10) 0.005 (0.13) 0.003 (0.08) 0.004 (0.10) Over 0.034 to 0.43 (0.86 to 1.1), incl 0.005 (0.13) 0.006 (0.15) 0.004 (0.10) 0.005 (0.13) Over 0.043 to 0.056 (1.1 to 1.4), incl 0.005 (0.13) 0.006 (0.15) 0.004 (0.10) 0.005 (0.13) Over 0.056 to 0.070 (1.4 to 1.8), incl 0.006 (0.15) 0.007 (0.18) 0.005 (0.13) 0.006 (0.15) Over 0.070 to 0.078 (1.8 to 2.0), incl 0.007 (0.18) 0.008 (0.20) 0.006 (0.15) 0.007 (0.18) Over 0.078 to 0.093 (2.0 to 2.4), incl 0.008 (0.20) 0.009 (0.23) 0.007 (0.18) 0.008 (0.20) Over 0.093 to 0.109 (2.4 to 2.8), incl 0.009 (0.23) 0.010 (0.25) 0.007 (0.18) 0.009 (0.23) Over 0.109 to 0.125 (2.8 to 3.2), incl 0.010 (0.25) 0.012 (0.31) 0.008 (0.20) 0.010 (0.25) Over 0.125 to 0.140 (3.2 to 3.6), incl 0.012 (0.31) 0.014 (0.36) 0.008 (0.20) 0.010 (0.25) Over 0.140 to 0.171 (3.6 to 4.3), incl 0.014 (0.36) 0.016 (0.41) 0.009 (0.23) 0.012 (0.31) Over 0.171 to 0.187 (4.3 to 4.8), incl 0.015 (0.38) 0.017 (0.43) 0.010 (0.25) 0.013 (0.33) Over 0.187 to 0.218 (4.8 to 5.5), incl 0.017 (0.43) 0.019 (0.48) 0.011 (0.28) 0.015 (0.38) Over 0.218 to 0.234 (5.5 to 5.9), incl 0.018 (0.46) 0.020 (0.51) 0.012 (0.31) 0.016 (0.41) Over 0.234 to 0.250 (5.9 to 6.4), incl 0.020 (0.51) 0.022 (0.56) 0.013 (0.33) 0.018 (0.46) Cold-Rolled Strip Specified Thickness, in. (mm) Widths 12 in. (305 mm) and under, 6A Up to 0.050 (1.3), incl 0.0015 (0.04) Over 0.050 to 0.093 (1.3 to 2.4), incl 0.0025 (0.06) Over 0.093 to 0.125 (2.4 to 3.2), inclB 0.004 (0.11) ... AMeasured 3⁄8 in. (9.5 mm) or more from either edge except for strip under 1 in. (25.4 mm) in width which is measured at any place. BStandard sheet tolerances apply for thicknesses over 0.125 in. (3.2 mm) and for all thicknesses of strip over 12 in. (305 mm) wide. B 670 – 9502 5 10. Number of Tests 10.1 Chemical Analysis—One test per lot. 10.2 Tension— One test per lot. TABLE 7 Permissible Variations in WidthA of Sheared, Plasma-Torch-Cut, and Abrasive-Cut Rectangular PlateB,C Specified Thickness Permissible Variations in Widths for Widths Given, in. (mm) Up to 30 (760), incl Over 30 to 72 (760to 1830), incl Over 72 to 108 (1830 to 2740), incl Over 108 to 144 (2740 to 3660), incl Over 144 to 160 (3660 to 4070), incl Plus Minus Plus Minus Plus Minus Plus Minus Plus Minus Inches Sheared:D 3⁄16 to 5⁄16 , excl 3⁄16 1⁄8 1⁄4 1⁄8 3⁄8 1⁄8 1⁄2 1⁄8 ... ... 5⁄16 to 1⁄2 , excl 1⁄4 1⁄8 3⁄8 1⁄8 3⁄8 1⁄8 1⁄2 1⁄8 5⁄8 1⁄8 1⁄2 to 3⁄4 , excl 3⁄8 1⁄8 3⁄8 1⁄8 1⁄2 1⁄8 5⁄8 1⁄8 3⁄4 1⁄8 3⁄4 to 1, excl 1⁄2 1⁄8 1⁄2 1⁄8 5⁄8 1⁄8 3⁄4 1⁄8 7⁄8 1⁄8 1 to 11⁄4 , incl 5⁄8 1⁄8 5⁄8 1⁄8 3⁄4 1⁄8 1⁄8 1⁄8 1 1⁄8 Abrasive-cut:E,F 3⁄16 to 11⁄4 , incl 1⁄8 1⁄8 1⁄8 1⁄8 1⁄8 1⁄8 1⁄8 1⁄8 1⁄8 1⁄8 over 11⁄4 to 21⁄4 , incl 3⁄16 1⁄8 3⁄16 1⁄8 3⁄16 1⁄8 3⁄16 1⁄8 3⁄16 1⁄8 Plasma-torch-cut:G 3⁄16 to 11⁄2 , excl 3⁄4 0 3⁄4 0 3⁄4 0 3⁄4 0 3⁄4 0 11⁄2 to 21⁄4 , incl 1 1⁄4 1 1⁄4 1 1⁄4 1 1⁄4 1 1⁄4 Millimetres Sheared:D 4.8 to 7.9, excl 4.8 3.2 6.4 3.2 9.5 3.2 12.7 3.2 ... ... 7.9 to 12.7, excl 6.4 3.2 9.5 3.2 9.5 3.2 12.7 3.2 15.9 3.2 12.7 to 19.0, excl 9.5 3.2 9.5 3.2 12.7 3.2 15.9 3.2 19.0 3.2 19.0 to 25.4, excl 12.7 3.2 12.7 3.2 15.9 3.2 19.0 3.2 22.2 3.2 25.4 to 31.8, incl 15.9 3.2 15.9 3.2 19.0 3.2 22.2 3.2 25.4 3.2 Abrasive-cut:E,F 4.8 to 31.8, incl 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 3.2 over 31.8 to 57.2, incl 4.8 3.2 4.8 3.2 4.8 3.2 4.8 3.2 4.8 3.2 Plasma-torch-cut:G 4.8 to 38.1, excl 19.0 0 19.0 0 19.0 0 19.0 0 19.0 0 38.1 to 57.2, incl 25.4 6.4 25.4 6.4 25.4 6.4 25.4 6.4 25.4 6.4 APermissible variations in width for powder or inert-arc-cut plate shall be as agreed upon between the manufacturer and the purchaser. BPermissible variations in machined, powder-, or inert-arc-cut circular plate shall be as agreed upon between the manufacturer and the purchaser. CPermissible variations in plasma-torch-cut sketch plates shall be as agreed upon between the manufacturer and the purchaser. DThe minimum sheared width is 10 in. (254 mm) for material 3⁄4 in. (19.0 mm) and under in thickness and 20 in. (508 mm) for material over 3⁄4 in. in thi