基本信息
| 标准名称： | 石棉水泥波瓦、平板抗折性试验方法 |
| 中标分类： |
建材 >>
建材产品 >>
混凝土制品 |
| 替代情况： | 被GB/T 7019-1997代替 |
| 发布日期： | 1900-01-01 |
| 实施日期： | 1988-01-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
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引用标准
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所属分类： 建材 建材产品 混凝土制品
【英文标准名称】:HardnessConversionTablesforMetals
【原文标准名称】:金属硬度换算表
【标准号】:ANSI/ASTME140-2002
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【实施或试行日期】:2002-01-10
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:换算表;硬度测量;金属
【英文主题词】:hardnessmeasurement;conversiontables;metals
【摘要】:ConversionTable1presentsdataintheRockwellChardnessrangeontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,Rockwellsuperficialhardness,Knoophardness,andScleroscopehardnessofnon-austeniticsteelsincludingcarbon,alloy,andtoolsteelsintheas-forged,annealed,normalized,andquenchedandtemperedconditionsprovidedthattheyarehomogeneous.ConversionTable2presentsdataintheRockwellBhardnessrangeontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,Rockwellsuperficialhardness,Knoophardness,andScleroscopehardnessofnon-austeniticsteelsincludingcarbon,alloy,andtoolsteelsintheas-forged,annealed,normalized,andquenchedandtemperedconditionsprovidedthattheyarehomogeneous.ConversionTable3presentsdataontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,Rockwellsuperficialhardness,andKnoophardnessofnickelandhigh-nickelalloys(nickelcontentover50%).Thesehardnessconversionrelationshipsareintendedtoapplyparticularlytothefollowing:nickel-aluminum-siliconspecimensfinishedtocommercialmillstandardsforhardnesstesting,coveringtheentirerangeofthesealloysfromtheirannealedtotheirheavilycold-workedorage-hardenedconditions,includingtheirintermediateconditions.ConversionTable4presentsdataontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,andRockwellsuperficialhardnessofcartridgebrass.ConversionTable5presentsdataontherelationshipbetweenBrinellhardnessandRockwellBhardnessofausteniticstainlesssteelplateintheannealedcondition.ConversionTable6presentsdataontherelationshipbetweenRockwellhardnessandRockwellsuperficialhardnessofausteniticstainlesssteelsheet.ConversionTable7presentsdataontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,Rockwellsuperficialhardness,andKnoophardnessofcopper.ConversionTable8presentsdataontherelationshipamongBrinellhardness,Rockwellhardness,andVickershardnessofalloyedwhiteiron.ConversionTable9presentsdataontherelationshipamongBrinellhardness,Vickershardness,Rockwellhardness,andRockwellsuperficialhardnessofwroughtaluminumproducts.Manyoftheconversionvaluespresentedhereinwereobtainedfromcomputer-generatedcurvesofactualtestdata.MostRockwellhardnessnumbersarepresentedtothenearest0.1or0.5hardnessnumbertopermitaccuratereproductionofthesecurves.Sinceallconvertedhardnessvaluesmustbeconsideredapproximate,however,allconvertedRockwellhardnessnumbersshallberoundedtothenearestwholenumberinaccordancewithPracticeE29.AppendixX1-AppendixX9containequationsdevelopedfromthedatainTable1-9,respectively,toconvertfromonehardnessscaletoanother.Sinceallconvertedhardnessvaluesmustbeconsideredapproximate,however,allconvertedhardnessnumbersshallberoundedinaccordancewithPracticeE29.Conversionofhardnessvaluesshouldbeusedonlywhenitisimpossibletotestthematerialundertheconditionsspecified,andwhenconversionismadeitshouldbedonewithdiscretionandundercontrolledconditions.Eachtypeofhardnesstestissubjecttocertainerrors,butifprecautionsarecarefullyobserved,thereliabilityofhardnessreadingsmadeoninstrumentsoftheindentationtypewillbefoundcomparable.Differencesinsensitivitywithintherangeofagivenhardnessscale(forexample,RockwellB)maybegreaterthanbetweentwodifferentscalesortypesofinstruments.Theconversionvalues,whetherfromthetablesorcalculatedfromtheequations,areonlyapproximateandmaybeinaccurateforspecificapplication.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:
【正文语种】:英语