This specification covers two classes of round cold-drawn steel spring wire having properties and quality for the manufacture of mechanical springs that are not subject to high stress or requiring high fatigue properties and wire forms. The steel specimens shall either be ingot cast or strand cast. Cast or heat and product analysis shall be performed wherein steel materials shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, and silicon. Specimens shall also undergo tension and wrap tests and shall conform to the requirements of tensile properties.1.1 This specification covers two classes of round cold-drawn steel spring wire having properties and quality for the manufacture of mechanical springs, rings, and wire forms that are not subject to high stress or requiring high fatigue properties.1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

This specification covers inner rings for needle roller bearings with drawn outer rings. The use of recycled materials that meet the requirements of the applicable material specification without jeopardizing the intended use of the item is encouraged. Bearing inner rings shall be manufactured of steel, alloy or carbon. The raceway (outside diameter) surface shall have a maximum surface roughness conforming to the requirements specified.1.1 This specification covers inner rings for needle roller bearings with drawn outer rings.1.2 The inner rings specified in this specification are intended for use on unhardened shafts in conjunction with open end needle roller bearings shown on Specification F2162 and MS52141.1.3 The use of recycled materials that meet the requirements of the applicable material specification without jeopardizing the intended use of the item is encouraged.1.4 The inner rings specified in this specification are not intended for use in flight-critical systems of aircraft.1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.NOTE 1: This specification contains many of the requirements of MS17130, which was originally developed by the Department of Defense and is currently maintained by the Defense Supply Center Richmond.

定价： 515元 / 折扣价： 438 元 加购物车

定价： 533元 / 折扣价： 454 元

This specification covers drawn seamless aluminum-alloy tube of specified tensile properties for use in surface condensers, evaporators, and heat exchangers. The tube shall be produced by drawing an extruded tube made from hollow extrusion ingot (cast in hollow form or pierced) and extruded by use of the die and mandrel method. The tube shall be subjected to tension, leak, and expansion tests.1.1 This specification2 covers aluminum-alloy (Note 1) drawn seamless round tube in straight lengths designated as shown in Table 2, for use in surface condensers, evaporators, and heat exchangers.NOTE 1: Throughout this specification use of the term alloy in the general sense includes aluminum as well as aluminum alloy.NOTE 2: For drawn seamless tubes used in general applications, see Specifications B210 and B210M; for extruded tubes see Specifications B221 and B221M; for seamless pipe and seamless extruded tube used in pressure applications see Specification B241/B241M; and for structural pipe and tube see Specification B429/B429M.(A) Limits are in percent maximum unless shown as a range or otherwise stated.(B) Analysis shall be made for the elements for which limits are shown in this table.(C) For purposes of determining conformance to these limits, an observed value or a calculated value attained from analysis shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit, in accordance with the rounding-off method of Practice E29.(D) Others includes listed elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements not specified in this specification. However, such analysis is not required and may not cover all metallic Others elements. Should any analysis by the producer or the purchaser establish that an Others element exceeds the limit of Each or that the aggregate of several Others elements exceeds the limit of Total, the material shall be considered nonconforming.(E) Other Elements—Total shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.(F) Vanadium 0.05 max.(G) The aluminum content shall be calculated by subtracting from 100.00 % the sum of all the metallic elements present in amounts of 0.010 % or more, rounded to the second decimal before determining the sum.(H) Composition of cladding alloy as applied during the course of manufacture. The sample from finished tube shall not be required to conform to these limits.(I) In case there is a discrepancy in the values listed in Table 1 with those listed in the “International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys” (known as the “Teal Sheets”), the composition limits registered with the Aluminum Association and published in the “Teal Sheets” shall be considered the controlling composition. The “Teal Sheets” are available at http://www.aluminum.org/tealsheets.(A) To determine conformance to this specification, each value for ultimate strength and for yield strength shall be rounded to the nearest 0.1 ksi and each value for elongation to the nearest 0.5 %, both in accordance with the rounding-off method of Practice E29.(B) The basis for establishment of mechanical property limits is shown in Annex A1.(C) Elongation of full-section and cut-out sheet-type specimens is measured in 2 in., of cut-out round specimens, in 4 × specimen diameter.1.2 Alloy and temper designations are in accordance with ANSI H35.1/H35.1(M). The equivalent Unified Numbering System alloy designations are those of Table 1 preceded by A9, for example, A91060 for aluminum 1060, in accordance with Practice E527.1.3 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see Annex A2.1.4 This specification is the inch-pound companion to Specification B234M; therefore, no SI equivalents are presented in the specification.1.5 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

This specification covers drawn seamless aluminum-alloy tube of specified tensile properties for use in surface condensers, evaporators, and heat exchangers. The tube shall be produced by drawing an extruded tube made from hollow extrusion ingot (cast in hollow form or pierced) and extruded by use of the die and mandrel method. The tube shall be subjected to tension, leak, and expansion tests.1.1 This specification covers aluminum-alloy (Note 1) drawn seamless round tube in straight lengths designated as shown in the Table 2, for use in surface condensers, evaporators, and heat exchangers.NOTE 1: Throughout this specification use of the term alloy in the general sense includes aluminum as well as aluminum alloy.NOTE 2: For drawn seamless tubes used in general applications, see Specifications B210 and B210M; for extruded tubes see Specifications B221 and B221M; for seamless pipe and seamless extruded tube used in pressure applications, see Specification B241/B241M; and for structural pipe and tube see Specification B429/B429M.(A) Limits are in percent maximum unless shown as a range or otherwise stated.(B) Analysis shall be made for the elements for which limits are shown in this table.(C) For purposes of determining conformance to these limits, an observed value or a calculated value attained from analysis shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit, in accordance with the rounding-off method of Practice E29.(D) Others includes listed elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements not specified in this specification. However, such analysis is not required and may not cover all metallic Others elements. Should any analysis by the producer or the purchaser establish that an Others element exceeds the limit of Each or that the aggregate of several Others elements exceeds the limit of Total, the material shall be considered nonconforming.(E) Other Elements—Total shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.(F) Vanadium 0.05 max.(G) The aluminum content shall be calculated by subtracting from 100.00 % the sum of all the metallic elements present in amounts of 0.010 % or more, rounded to the second decimal before determining the sum.(H) Composition of cladding alloy as applied during the course of manufacture. The sample from finished tube shall not be required to conform to these limits.(I) In case there is a discrepancy in the values listed in Table 1 with those listed in the “International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys” (known as the “Teal Sheets”), the composition limits registered with the Aluminum Association and published in the “Teal Sheets” shall be considered the controlling composition. The “Teal Sheets” are available at http://www.aluminum.org/tealsheets.(A) To determine conformance to this specification, each value for tensile strength and for yield strength shall be rounded to the nearest 1 MPa and each value for elongation to the nearest 0.5 %, both in accordance with the rounding-off method of Practice E29.(B) The basis for establishment of mechanical property limits is shown in Annex A1.1.2 Alloy and temper designations are in accordance with ANSI H35.1M. The equivalent Unified Numbering System alloy designations are those of Table 1 preceded by E215, for example, A91060 for aluminum 1060, in accordance with Practice E527.1.3 For acceptance criteria for inclusion of new aluminum and aluminum alloys in this specification, see Annex A1.1.4 This specification is the SI companion to Specification B234.1.5 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

定价： 533元 / 折扣价： 454 元

This specification covers bare hard-drawn round copper-clad steel wire. The surface of the wire shall be smooth and free from imperfections not consistent with good commercial practice. The wire shall conform to the tensile requirements. Specimens shall be twisted to destruction and shall not reveal under test any seams, pits, slivers, or surface imperfections of sufficient magnitude to indicate inherent defects or imperfections in the wire. The electrical resistance of the wire shall be determined by resistance measurements. The finished wire shall contain no joints or splices made at finished size.1.1 This specification covers bare hard-drawn round copper-clad steel wire for electrical purposes (Note 1).NOTE 1: Wire ordered to this specification is not intended for redrawing. If wire is desired for this purpose, consult the manufacturer.1.2 Four grades of wire are specified, designated as follows (Note 2): Grade 40 HS, Grade 40 EHS, Grade 30 HS, and Grade 30 EHS.NOTE 2: The grades covered by this specification correspond to the following commercial designations:   Grade 40 HS, High Strength, 40 % Conductivity.   Grade 40 EHS, Extra High Strength, 40 % Conductivity  Grade 30 HS, High Strength, 30 % Conductivity.  Grade 30 EHS, Extra High Strength, 30 % Conductivity.1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

This specification covers tinned hard-drawn and medium-hard-drawn round copper wire for electrical properties. The tinned wire shall be made by coating hard-drawn and medium-hard-drawn copper wire with commercially pure tin. The copper shall be of such quality and purity that the finished product shall have the properties and characteristics prescribed in this specification. The tin coating shall consist of a smooth continuous layer, firmly adhering to the surface of the copper. The wire shall be free from all imperfections not consistent with the best commercial practice. The tinned wire shall conform to the requirements as to the tensile properties prescribed. Tension tests shall be made on representative samples. The elongation of the wire shall be determined as the permanent increase in length due to the breaking of the wire in tension, measured between gage marks. Electrical resistivity shall be determined by resistance measurements made in accordance with the test method prescribed in this specification. The continuity of coating on the wire shall be determined by the sodium polysulfide test. The specimens shall be thoroughly cleaned by immersion in a suitable solvent for the appropriate time required to remove oil or grease from surface; then removed and wiped dry with clean, soft cloth. Mechanical test for adhesion of coating shall be performed. Any cracking or parting of the coating in the area shown by blackening of the copper shall be cause for rejection.1.1 This specification covers tinned hard-drawn and medium-hard-drawn round copper wire for electrical purposes.1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.2.1 Exception—For density, resistivity and temperature, the values stated in SI units are to be regarded as standard.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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For hazard statement, see Sections 10 and 13.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车