ASTM A148– A148M–01 英文版

Designation: A 148/A 148M – 01 An American National Standard Standard Specification for Steel Castings, High Strength, for Structural Purposes1 This standard is issued under the fixed designation A 148/A 148M; 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. 1. Scope 1.1 This specification covers carbon steel, alloy steel, and martensitic stainless steel castings that are to be subjected to higher mechanical stresses than those covered in Specification A 27/A 27M. 1.2 Several grades of steel castings are covered, having the chemical composition and mechanical properties prescribed in Table 1 and Table 2. 1.3 The values stated in 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 inde- pendently of the other. Combining values from the two systems may result in nonconformance with the specification. 2. Referenced Documents 2.1 ASTM Standards: A 27/A 27M Specification for Steel Castings, Carbon, for General Application2 A 370 Test Methods and Definitions for Mechanical Testing of Steel Products3 A 781/A 781M Specification for Castings, Steel and Alloy, Common Requirements for General Industrial Use2 E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications4 3. General Conditions for Delivery 3.1 Material furnished to this specification shall conform to the requirements of Specification A 781/A 781M, including any supplementary requirements that are indicated in the purchase order. Failure to comply with the general require- ments of Specification A 781/A 781M constitutes nonconfor- mance with this specification. In case of conflict between the requirements of this specification and Specification A 781/ A 781M, this specification shall prevail. 4. Ordering Information 4.1 The inquiry and order should include or indicate the following: 4.1.1 A description of the casting by pattern number or drawing (dimensional tolerances shall be included on the casting drawing), 4.1.2 Grade of steel, 4.1.3 Options in the specification, and 4.1.4 The supplementary requirements desired, including the standards of acceptance. 5. Heat Treatment 5.1 All castings shall be heat treated either by full annealing, normalizing, normalizing and tempering, or quenching and tempering. Unless otherwise specified in the inquiry, contract, or order, the castings may be heat treated by any of these heat treatments or combination of these heat treatments at the option of the manufacturer. 5.2 Heat treatment shall be performed after the castings have been allowed to cool below the transformation range. 6. Temperature Control 6.1 Furnace temperatures for heat-treating shall be regulated 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 A01.18 on Castings. Current edition approved Mar. 10, 2001. Published May 2001. Originally published as A 148 – 55. Last previous edition A 148/A 148M – 93b (1998). 2 Annual Book of ASTM Standards, Vol 01.02. 3 Annual Book of ASTM Standards, Vol 01.03. 4 Annual Book of ASTM Standards, Vol 14.02. TABLE 1 Chemical Requirements Grade Composition, % Sulfur, max Phospho- rus, max 80-40 [550-275] 0.06 0.05 80-50 [550-345] 0.06 0.05 90-60 [620-415] 0.06 0.05 105-85 [725-585] 0.06 0.05 115-95 [795-655] 0.06 0.05 130-115 [895-795] 0.06 0.05 135-125 [930-860] 0.06 0.05 150-135 [1035-930] 0.06 0.05 160-145 [1105-1000] 0.06 0.05 165-150 [1140-1035] 0.020 0.020 165-150L [1140-1035L] 0.020 0.020 210-180 [1450-1240] 0.020 0.020 210-180L [1450-1240L] 0.020 0.020 260-210 [1795-1450] 0.020 0.020 260-210L [1795-1450L] 0.020 0.020 1 Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States. 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. 主营业务范围：ASTMASTMASTMASTM、NASNASNASNAS、NASMNASMNASMNASM、MILMILMILMIL、ISOISOISOISO、ENENENEN、 DINDINDINDIN、JISJISJISJIS等技术标准 翻译 阿房宫赋翻译下载德汉翻译pdf阿房宫赋翻译下载阿房宫赋翻译下载翻译理论.doc ；技术 资料 新概念英语资料下载李居明饿命改运学pdf成本会计期末资料社会工作导论资料工程结算所需资料清单 翻译；NADCAPNADCAPNADCAPNADCAP认证 标准资料翻译；国外技术标准中文版优惠低价代购等。 业务 QQQQQQQQ：2298175560229817556022981755602298175560 专业 专注于技术翻译 诚信 实惠 物超所值的服务可靠的质量保证 by the use of pyrometers. 7. Chemical Composition 7.1 The steel shall conform to sulfur and phosphorus re- quirements as prescribed in Table 1. 7.2 The content of carbon, manganese, silicon, and alloying elements may, by agreement, be prescribed by the purchaser. If not specified, the content may be selected by the manufacturer to obtain the required mechanical properties. 7.3 When the analysis of carbon, manganese, silicon, or any intentionally added alloying element is specifically requested in the contract or order, it shall be made by the manufacturer and reported to the purchaser. The results of these analyses shall not be used as a basis for rejection except by prior agreement. 8. Tensile Requirements 8.1 One tension test shall be made from each heat and shall conform to the tensile requirements specified in Table 2. 8.2 The test coupons and specimens shall conform to requirements specified in Section 11. 8.3 Tension test coupons shall be machined to the form and dimension shown in Fig. 5 of Test Methods and Definitions A 370 and tested in accordance with those test methods. 8.4 To determine conformance with the tension test require- ments, an observed value or calculated value shall be rounded off in accordance with Practice E 29 to the nearest 500 psi [5 MPa] for yield point and tensile strength and to the nearest 1 % for elongation and reduction of area. 9. Charpy Impact Requirements 9.1 This section is applicable only to grades 165-150L [1140-1035L], 210-180L [1450-1240L], and 260-210L [1795- 1450L]. NOTE 1—Other grades may be ordered to charpy impact test require- ments in accordance with Supplementary Requirement S9 of Specification A 781/A 781M. 9.2 The notched bar impact properties of each heat shall be determined by testing one set of three Charpy V-notch impact specimens at −40° 6 2°F [−40° 6 1°C]. The energy value of the three specimens shall not be less than shown in Table 3. 9.3 Test coupons and specimens shall conform to the requirements specified in Section11. 9.4 Impact test specimens shall be machined to the form and dimensions shown in Test Methods and Definitions A 370, Type A, Charpy V-notch specimen, Fig. 11, and tested in accordance with those test methods. 10. Retests 10.1 If the results of the tensile or charpy tests do not conform to the requirements specified, heat-treated castings may, at the manufacturer’s option, be reheat treated. Testing after reheat treatment shall consist of the full number of specimens complying with the specification or order. 11. Test Coupons and Specimens 11.1 Test bars shall be poured from the same heat as the castings represented. Test coupons may be cast integrally with the castings or as separate blocks similar to those shown in Fig. 1 of Specification A 781/A 781M. 11.1.1 In the case of quenched and tempered castings where the ruling section of the casting exceeds three inches, supple- mentary requirement S 15 of Specification A 781/A 781M shall apply. 11.2 The bar from which the test piece is taken shall be heat treated in production furnaces with the castings or to the same procedure as the castings it represents. TABLE 2 Tensile Requirements Grade Tensile strength min, ksi [MPa] Yield point min, ksi [MPa] Elongation in 2 in. or 50 mm, min, %A Reduction of Area, min, % 80-40 [550-275] 80 [550] 40 [275] 18 30 80-50 [550-345] 80 [550] 50 [345] 22 35 90-60 [620-415] 90 [620] 60 [415] 20 40 105-85 [725-585] 105 [725] 85 [585] 17 35 115-95 [795-655] 115 [795] 95 [655] 14 30 130-115 [895-795] 130 [895] 115 [795] 11 25 135-125 [930-860] 135 [930] 125 [860] 9 22 150-135 [1035-930] 150 [1035] 135 [930] 7 18 160-145 [1105-1000] 160 [1105] 145 [1000] 6 12 165-150 [1140-1035] 165 [1140] 150 [1035] 5 20 165-150L [1140-1035L]B 165 [1140] 150 [1035] 5 20 210-180 [1450-1240] 210 [1450] 180 [1240] 4 15 210-180L [1450-1240L]B 210 [1450] 180 [1240] 4 15 260-210 [1795-1450] 260 [1795] 210 [1450] 3 6 260-210L [1795-1450L]B 260 [1795] 210 [1450] 3 6 A When ICI test bars are used in tensile testing as provided for in this specification, the gage length to reduced section diameter ratio shall be 4 to 1. B These grades must be charpy impact tested as prescribed in Section 9, and with minimum values as shown in Table 3. TABLE 3 Impact Requirements Grade 165-150L [1140- 1035L] 210-180L [1450- 1240L] 260-210L [1795- 1450L] Impact Requirements Charpy V-notch Energy value, ft·lbf [J], min value for two specimens and minimum aver- age of three specimens 20 [27] 15 [20] 6 [8] Energy value, ft·lbf [J], min for single specimen 16 [22] 12 [16] 4 [5] A 148/A 148M 2 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. 11.2.1 When the bar from which the test piece is taken is not heat treated as part of the same heat treatment load as the casting(s) it qualifies, the austenitizing (or solution, if appli- cable) temperatures for the bar shall be within 25°F of those for the casting(s). The tempering temperature for the bar shall be no higher than 25°F above that of the casting(s) and no higher than permitted by the heat treatment procedure for the material. The cycle time at each temperature shall not exceed that for the casting(s). 11.3 Test specimens may be cut from heat-treated castings, at the producer’s option, instead of from test bars. 11.4 If any specimen shows defective machining, or exhib- its flaws, it may be discarded and another substituted from the same heat. 12. Repair by Welding 12.1 Weld repairs shall be inspected to the same quality standards that are used to inspect the castings. When castings are produced with Supplementary Requirement S1 specified, weld repairs shall be inspected by magnetic particle examina- tion to the same standards that are used to inspect the castings. When castings are produced with Supplementary Requirement S2 specified, weld repairs in which the depth of the cavity prepared for repair welding exceeds 20 % of the wall thickness or 1 in. [25 mm], whichever is smaller, or in which the cavity prepared for welding is greater than approximately 10 in.2[65 cm2], shall be radiographed to the same standards that are used to inspect the castings. 12.2 Welds exceeding 20 % of the wall thickness or 1 in. [25 mm], whichever is smaller, or exceeding approximately 10 in.2[65 cm2] in area, shall be given a suitable stress relief or heat treatment. 13. Rehearing 13.1 Tested samples representing rejected material shall be held for two weeks from the date of the test report. In case of dissatisfaction with the results of the tests, the manufacturer may make claim for a rehearing within that time. 14. Keywords 14.1 alloy steel; carbon steel; castings; high strength steel; martensitic stainless steel; steel castings; structural castings SUPPLEMENTARY REQUIREMENTS The following supplementary requirements shall not apply unless specified in the purchase order. A list of standardized supplementary requirements for use at the option of the purchaser is included in Specification A 781/A 781M. Those which are ordinarily considered suitable for use with this specification are given below together with additional supplementary requirements that are applicable only to this specification. Other supplementary requirements enumerated in Specification A 781/ A 781M may be used with this specification upon agreement between the manufacturer and purchaser. S1. Magnetic Particle Examination. S2. Radiographic Examination. S6. Certification. S8. Marking. S9. Charpy Impact Test S9.1 Charpy impact test properties shall be determined on each heat from a set of three Charpy V-notch specimens made from a test coupon in accordance with Test Methods and Definitions A 370 and tested at a test temperature agreed upon between the manufacturer and purchaser. The acceptance requirements shall be either energy absorbed, lateral expan- sion, or percent shear area, or all three, and shall be that agreed upon by the manufacturer and purchaser. Test specimens shall be prepared as Type A and tested in accordance with Test Methods and Definitions A 370. S9.2 Absorbed Energy—Average energy value of three specimens shall be not less than specified, with not more than one value permitted to fall below the minimum specified and no value permitted below the minimum specified for a single specimen. S9.3 Lateral Expansion—Lateral expansion value shall be agreed upon between the manufacturer and purchaser. S9.4 Percent Shear Area—Percent shear area shall be agreed upon between the manufacturer and purchaser. S15. Alternate Tension Test Coupons and Specimen Locations for Castings (in lieu of Test Bars Poured from Special Blocks). The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. A 148/A 148M 3 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. This standard is copyrighted by ASTM, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address or at 610-832-9585 (phone), 610-832-9555 (fax), or service@astm.org (e-mail); or through the ASTM website (www.astm.org). A 148/A 148M 4 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.