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EN 843-1:2006

Current

Current

The latest, up-to-date edition.

Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 1: Determination of flexural strength

Published date

13-12-2006

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Significance and use
5 Apparatus
  5.1 Test jig
  5.2 Test machine
  5.3 Micrometer or alternative calibrated device
  5.4 Travelling microscope
  5.5 Humidity measuring device
6 Test pieces
  6.1 General
  6.2 Dimensions and tolerances
  6.3 Surface finish
  6.4 Number of test pieces
  6.5 Precautions
7 Procedure
8 Calculations
9 Test report
Annex A (informative) Typical fracture patterns
        in ceramic test pieces
Bibliography

This part of EN 843 specifies methods for determining the nominal flexural strength of advanced monolithic technical ceramic materials at ambient temperature. The available loading geometries are three- and four-point flexure, using rectangular section test pieces of two prescribed geometries: 20 mm support span (A) and 40 mm support span (B).NOTEThis part of EN 843 differs from ISO 14704 (see Bibliography) in respect of span A (not included in the ISO version), the absence of the 30 mm span option, and the required use of a fully articulating test jig.The test applies to materials with grain size less than 200 µm.The test prescribes four categories of surface finish applied to the test pieces:I:as-fired or annealed after machining;II:standard finishing by grinding;III:standard finishing by lapping/polishing;IV:machined using agreed grinding procedures and material removal rates.

Committee
CEN/TC 184
DevelopmentNote
Supersedes UNE EN 843-1. (01/2007)
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Current

Standards Relationship
PN EN 843-1 : 2007 Identical
UNE-EN 843-1:2006 Identical
NEN EN 843-1 : 2007 Identical
NS EN 843-1 : 2ED 2006 Identical
NF EN 843-1 : 2007 Identical
UNI EN 843-1 : 2007 Identical
SN EN 843-1 : 2007 Identical
NBN EN 843-1 : 2007 Identical
I.S. EN 843-1:2006 Identical
BS EN 843-1:2006 Identical
UNE-EN 843-1:1996 Identical
DIN EN 843-1:2008-08 Identical
PNE-prEN 843-1 Identical

14/30276373 DC : 0 BS EN ISO 13356 - IMPLANTS FOR SURGERY - CERAMIC MATERIALS BASED ON YTTRIASTABILIZED TETRAGONAL ZIRCONIA (Y-TZP)
UNI EN 820-4 : 2009 ADVANCED TECHNICAL CERAMICS - THERMOMECHANICAL PROPERTIES OF MONOLITHIC CERAMICS - PART 4: DETERMINATION OF FLEXURAL CREEP DEFORMATION AT ELEVATED TEMPERATURES
BS 7253-6:1997 Non-metallic materials for surgical implants Specification for ceramic materials based on yttria-stabilized tetragonal zirconia (Y-TZP)
BS EN 820-4:2009 Advanced technical ceramics. Thermomechanical properties of monolithic ceramics Determination of flexural creep deformation at elevated temperatures
DIN EN 1006:2009-10 Advanced technical ceramics - Monolithic ceramics - Guidance on the selection of test pieces for the evaluation of properties
DD ENV 1006:2003 Advanced technical ceramics. Monolithic ceramics. Guidance on the selection of test pieces for the evaluation of properties
08/30185918 DC : 0 BS EN 1006 - ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - GUIDANCE ON THE SELECTION OF TEST PIECES FOR THE EVALUATION OF PROPERTIES
05/30117313 DC : DRAFT MAY 2005 EN 13233 - ADVANCED TECHNICAL CERAMICS - NOTATIONS AND SYMBOLS
PREN 14425-3 : DRAFT 2009 ADVANCED TECHNICAL CERAMICS - TEST METHODS FOR DETERMINATION OF FRACTURE TOUGHNESS OF MONOLITHIC CERAMICS - PART 3: CHEVRON NOTCHED BEAM (CNB) METHOD
I.S. EN ISO 13356:2015 IMPLANTS FOR SURGERY - CERAMIC MATERIALS BASED ON YTTRIA-STABILIZED TETRAGONAL ZIRCONIA (Y-TZP) (ISO 13356:2015)
CEN/TR 13233 : 2007 COR 2007 ADVANCED TECHNICAL CERAMICS - NOTATIONS AND SYMBOLS
I.S. ENV 820-1:1994 ADVANCED TECHNICAL CERAMICS MONOLITHIC CERAMICS THERMOMECHANICAL PROPERTIES - PART 1: DETERMINATION OF FLEXURAL STRENGTH AT ELEVATED TEMPERATURES
I.S. EN 14425-3:2010 ADVANCED TECHNICAL CERAMICS - TEST METHODS FOR DETERMINATION OF FRACTURE TOUGHNESS OF MONOLITHIC CERAMICS - PART 3: CHEVRON NOTCHED BEAM (CNB) METHOD
BS EN 843-2:2006 Advanced technical ceramics. Mechanical properties of monolithic ceramics at room temperature Determination of Young\'s modulus, shear modulus and Poisson\'s ratio
EN 14425-3:2010 Advanced technical ceramics - Test methods for determination of fracture toughness of monolithic ceramics - Part 3: Chevron notched beam (CNB) method
CEN/TS 14425-3 : 2003 ADVANCED TECHNICAL CERAMICS - TEST METHODS FOR DETERMINATION OF FRACTURE TOUGHNESS OF MONOLITHIC CERAMICS - PART 3: CHEVRON NOTCHED BEAM (CNB) METHOD
EN 1006:2009 Advanced technical ceramics - Monolithic ceramics - Guidance on the selection of test pieces for the evaluation of properties
EN 820-5:2009 Advanced technical ceramics - Thermomechanical properties of monolithic ceramics - Part 5: Determination of elastic moduli at elevated temperatures
ISO 6474-1:2010 Implants for surgery Ceramic materials Part 1: Ceramic materials based on high purity alumina
DIN EN ISO 13356:2016-02 IMPLANTS FOR SURGERY - CERAMIC MATERIALS BASED ON YTTRIA-STABILIZED TETRAGONAL ZIRCONIA (Y-TZP) (ISO 13356:2015)
I.S. EN 843-5:2006 ADVANCED TECHNICAL CERAMICS - MECHANICAL PROPERTIES OF MONOLITHIC CERAMICS AT ROOM TEMPERATURE - PART 5: STATISTICAL ANALYSIS
I.S. EN 843-2:2006 ADVANCED TECHNICAL CERAMICS - MECHANICAL PROPERTIES OF MONOLITHIC CERAMICS AT ROOM TEMPERATURE - PART 2: DETERMINATION OF YOUNG'S MODULUS, SHEAR MODULUS AND POISSON'S RATIO
DD ENV 12923-2:2001 Advanced technical ceramics. Monolithic ceramics Oxidation test
I.S. EN 1006:2009 ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - GUIDANCE ON THE SELECTION OF TEST PIECES FOR THE EVALUATION OF PROPERTIES
I.S. EN 820-4:2009 ADVANCED TECHNICAL CERAMICS - THERMOMECHANICAL PROPERTIES OF MONOLITHIC CERAMICS - PART 4: DETERMINATION OF FLEXURAL CREEP DEFORMATION AT ELEVATED TEMPERATURES
NF EN 820-4 : 2009 ADVANCED TECHNICAL CERAMICS - THERMOMECHANICAL PROPERTIES OF MONOLITHIC CERAMICS - PART 4: DETERMINATION OF FLEXURAL CREEP DEFORMATION AT ELEVATED TEMPERATURES
BS EN 843-5:2006 Advanced technical ceramics. Mechanical properties of monolithic ceramics at room temperature Statistical analysis
BS EN 820-3:2004 Advanced technical ceramics. Monolithic ceramics. Thermomechanical properties Determination of resistance to thermal shock by water quenching
04/30125773 DC : DRAFT NOV 2004 EN 12923-1 - ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - PART 1: GENERAL PRACTICE FOR UNDERTAKING CORROSION TESTS
UNI EN 14232 : 2009 ADVANCED TECHNICAL CERAMICS - TERMS, DEFINITIONS AND ABBREVIATIONS
16/30332223 DC : 0 BS ISO 6474-1 - IMPLANTS FOR SURGERY - CERAMIC MATERIALS - PART 1: CERAMIC MATERIALS BASED ON HIGH PURITY ALUMINA
17/30361518 DC : 0 BS ISO 6474-2 - IMPLANTS FOR SURGERY - CERAMIC MATERIALS - PART 2: COMPOSITE MATERIALS BASED ON A HIGH-PURITY ALUMINA MATRIX WITH ZIRCONIA REINFORCEMENT
BS EN ISO 13356:2015 Implants for surgery. Ceramic materials based on yttria-stabilized tetragonal zirconia (Y-TZP)
04/30125776 DC : DRAFT NOV 2004 EN 843-5 - ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - MECHANICAL PROPERTIES AT ROOM TEMPERATURE - PART 5: STATISTICAL ANALYSIS
DD CEN/TS 14425-3:2003 Advanced technical ceramics. Test methods for determination of fracture toughness of monolithic ceramics Chevron notched beam (CNB) method
I.S. CEN TS 14425-5:2004 ADVANCED TECHNICAL CERAMICS - TEST METHODS FOR DETERMINATION OF FRACTURE TOUGHNESS OF MONOLITIC CERAMICS - PART 5: SINGLE-EDGE VEE-NOTCH BEAM (SEVNB) METHOD
NF EN 820-5 : 2009 ADVANCED TECHNICAL CERAMICS - THERMOMECHANICAL PROPERTIES OF MONOLITHIC CERAMICS - PART 5: DETERMINATION OF ELASTIC MODULI AT ELEVATED TEMPERATURES
10/30196848 DC : 0 BS ISO 6474-2 - IMPLANTS FOR SURGERY - CERAMIC MATERIALS - PART 2: COMPOSITE MATERIALS BASED ON A HIGH PURITY ALUMINA MATRIX WITH ZIRCONIA REINFORCEMENT
BS EN 820-5:2009 Advanced technical ceramics. Thermomechanical properties of monolithic ceramics Determination of elastic moduli at elevated temperatures
09/30208469 DC : 0 BS EN 14425-3 - ADVANCED TECHNICAL CERAMICS - TEST METHODS FOR DETERMINATION OF FRACTURE TOUGHNESS OF MONOLITHIC CERAMICS - PART 3: CHEVRON NOTCHED BEAM (CNB) METHOD
BS EN 1006:2009 Advanced technical ceramics. Monolithic ceramics. Guidance on the selection of test pieces for the evaluation of properties
DD CEN/TS 14425-5:2004 Advanced technical ceramics. Test methods for determination of fracture toughness of monolithic ceramics Single-edge vee-notch beam (SEVNB) method
BS EN 843-7:2010 Advanced technical ceramics. Mechanical properties of monolithic ceramics at room temperature C-ring tests
04/30125779 DC : DRAFT NOV 2004 EN 843-2 - ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - MECHANICAL PROPERTIES AT ROOM TEMPERATURE - PART 2: DETERMINATION OF YOUNG'S MODULUS, SHEAR MODULUS AND POISSON'S RATIO
BS EN 14425-3:2010 Advanced technical ceramics. Test methods for determination of fracture toughness of monolithic ceramics Chevron notched beam (CNB) method
09/30185903 DC : 0 BS EN 14232 - ADVANCED TECHNICAL CERAMICS - TERMS, DEFINITIONS AND ABBREVIATIONS
PREN 14232 : DRAFT 2009 ADVANCED TECHNICAL CERAMICS - TERMS, DEFINITIONS AND ABBREVIATIONS
PD CEN/TR 13233:2007 Advanced technical ceramics. Notations and symbols
I.S. ENV 1006:2003 ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - GUIDANCE ON THE SELECTION OF TEST PIECES FOR THE EVALUATION OF PROPERTIES
I.S. ENV 14232:2003 ADVANCED TECHNICAL CERAMICS - TERMS, DEFINITIONS AND ABBREVIATIONS
ISO 6474-2:2012 Implants for surgery Ceramic materials Part 2: Composite materials based on a high-purity alumina matrix with zirconia reinforcement
I.S. CEN TS 820-5:2004 ADVANCED TECHNICAL CERAMICS - METHODS OF TESTING MONOLITHIC CERAMICS - THERMOMECHANICAL PROPERTIES - PART 5: DETERMINATION OF ELASTIC MODULI AT ELEVATED TEMPERATURES
BS EN 820-1:2002 Advanced technical ceramics. Methods of testing monolithic ceramics. Thermo-mechanical properties Determination of flexural strength at elevated temperatures
EN 820-4:2009 Advanced technical ceramics - Thermomechanical properties of monolithic ceramics - Part 4: Determination of flexural creep deformation at elevated temperatures
EN 843-7:2010 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 7: C-ring tests
I.S. EN 843-3:2005 ADVANCED TECHNICAL CERAMICS - MECHANICAL PROPERTIES OF MONOLITHIC CERAMICS AT ROOM TEMPERATURE - PART 3: DETERMINATION OF SUBCRITICAL CRACK GROWTH PARAMETERS FROM CONSTANT STRESSING RATE FLEXURAL STRENGTH TESTS
UNI EN 1006 : 2009 ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - GUIDANCE ON THE SELECTION OF TEST PIECES FOR THE EVALUATION OF PROPERTIES
I.S. EN 820-3:2004 ADVANCED TECHNICAL CERAMICS - METHODS OF TESTING MONOLITHIC CERAMICS - THERMOMECHANICAL PROPERTIES - PART 3: DETERMINATION OF RESISTANCE TO THERMAL SHOCK BY WATER QUENCHING
03/305222 DC : DRAFT MAR 2003 BS ISO 6474 - IMPLANTS FOR SURGERY - CERAMIC MATERIALS BASED ON HIGH PURITY ALUMINA
DIN EN 843-7:2010-11 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 7: C-ring tests
DIN EN 820-4:2013-01 ADVANCED TECHNICAL CERAMICS - THERMOMECHANICAL PROPERTIES OF MONOLITHIC CERAMICS - PART 4: DETERMINATION OF FLEXURAL CREEP DEFORMATION AT ELEVATED TEMPERATURES
DD ENV 14232:2003 Advanced technical ceramics. Terms, definitions and abbreviations
DD ENV 820-4:2002 Advanced technical ceramics. Methods of testing monolithic ceramics. Thermo-mechanical properties Determination of flexural creep deformation at elevated temperatures
NF EN 14425-3 : 2010 ADVANCED TECHNICAL CERAMICS - TEST METHODS FOR DETERMINATION OF FRACTURE TOUGHNESS OF MONOLITHIC CERAMICS - PART 3: CHEVRON NOTCHED BEAM (CNB) METHOD
UNI EN 843-7 : 2010 ADVANCED TECHNICAL CERAMICS - MECHANICAL PROPERTIES OF MONOLITHIC CERAMICS AT ROOM TEMPERATURE - PART 7: C-RING TESTS
I.S. EN 843-7:2010 ADVANCED TECHNICAL CERAMICS - MECHANICAL PROPERTIES OF MONOLITHIC CERAMICS AT ROOM TEMPERATURE - PART 7: C-RING TESTS
ISO 13356:2015 Implants for surgery — Ceramic materials based on yttria-stabilized tetragonal zirconia (Y-TZP)
BS EN 12923-1:2006 Advanced technical ceramics. Monolithic ceramics General practice for undertaking corrosion tests
BS EN 843-3:2005 Advanced technical ceramics. Mechanical properties of monolithic ceramics at room temperature Determination of subcritical crack growth parameters from constant stressing rate flexural strength tests
DIN EN 843-5:2007-03 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 5: Statistical analysis
EN 843-3:2005 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 3: Determination of subcritical crack growth parameters from constant stressing rate flexural strength tests
EN 843-2:2006 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 2: Determination of Young's modulus, shear modulus and Poisson's ratio
EN 843-5:2006 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 5: Statistical analysis
EN 820-1:2002 Advanced technical ceramics - Methods of testing monolithic ceramics - Thermonechanical properties - Part 1: Determination of flexural strength at elevated temperatures
EN 14232:2009 Advanced technical ceramics - Terms, definitions and abbreviations
EN ISO 13356:2015 Implants for surgery - Ceramic materials based on yttria-stabilized tetragonal zirconia (Y-TZP) (ISO 13356:2015)
EN 820-3 : 2004 ADVANCED TECHNICAL CERAMICS - METHODS OF TESTING MONOLITHIC CERAMICS - THERMOMECHANICAL PROPERTIES - PART 3: DETERMINATION OF RESISTANCE TO THERMAL SHOCK BY WATER QUENCHING
I.S. EN 12923-1:2006 ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - PART 1: GENERAL PRACTICE FOR UNDERTAKING CORROSION TESTS
08/30185906 DC : 0 BS EN 820-4 - ADVANCED TECHNICAL CERAMICS - THERMOMECHANICAL PROPERTIES OF MONOLITHIC CERAMICS - PART 4: DETERMINATION OF FLEXURAL CREEP DEFORMATION AT ELEVATED TEMPERATURES
DIN EN 820-5:2009-10 ADVANCED TECHNICAL CERAMICS - THERMOMECHANICAL PROPERTIES OF MONOLITHIC CERAMICS - PART 5: DETERMINATION OF ELASTIC MODULI AT ELEVATED TEMPERATURES
I.S. EN 820-1:2002 ADVANCED TECHNICAL CERAMICS - METHODS OF TESTING MONOLITHIC CERAMICS - THERMOMECHANICAL PROPERTIES - PART 1: DETERMINATION OF FLEXURAL STRENGTH AT ELEVATED TEMPERATURES
BS ISO 6474-2:2012 Implants for surgery. Ceramic materials Composite materials based on a high-purity alumina matrix with zirconia reinforcement
BS EN 14232:2009 Advanced technical ceramics. Terms, definitions and abbreviations
DD CEN/TR 13233 : 2007 ADVANCED TECHNICAL CERAMICS - NOTATIONS AND SYMBOLS
BS ISO 6474-1:2010 Implants for surgery. Ceramic materials Ceramic materials based on high purity alumina
DD CEN/TS 14425-1:2003 Advanced technical ceramics. Test methods for determination of fracture toughness of monolithic ceramics Guide to test method selection
UNI EN 820-5 : 2009 ADVANCED TECHNICAL CERAMICS - THERMOMECHANICAL PROPERTIES OF MONOLITHIC CERAMICS - PART 5: DETERMINATION OF ELASTIC MODULI AT ELEVATED TEMPERATURES
08/30185915 DC : 0 BS EN 820-5 - ADVANCED TECHNICAL CERAMICS - THERMOMECHANICAL PROPERTIES OF MONOLITHIC CERAMICS - PART 5: DETERMINATION OF ELASTIC MODULI AT ELEVATED TEMPERATURES
I.S. ENV 820-3:1994 ADVANCED TECHNICAL CERAMICS MONOLITHIC CERAMICS THERMOMECHANICAL PROPERTIES - PART 3: DETERMINATION OF RESISTANCE TO THERMAL SHOCK BY WATER QUENCHING
UNI EN 14425-3 : 2010 ADVANCED TECHNICAL CERAMICS - TEST METHODS FOR DETERMINATION OF FRACTURE TOUGHNESS OF MONOLITHIC CERAMICS - PART 3: CHEVRON NOTCHED BEAM (CNB) METHOD
I.S. EN 820-5:2009 ADVANCED TECHNICAL CERAMICS - THERMOMECHANICAL PROPERTIES OF MONOLITHIC CERAMICS - PART 5: DETERMINATION OF ELASTIC MODULI AT ELEVATED TEMPERATURES
I.S. EN 14232:2009 ADVANCED TECHNICAL CERAMICS - TERMS, DEFINITIONS AND ABBREVIATIONS
S.R. CEN TR 13233:2007 ADVANCED TECHNICAL CERAMICS - NOTATIONS AND SYMBOLS
DIN EN 12923-1:2007-03 Advanced technical ceramics - Monolithic ceramics - Part 1: General practice for undertaking corrosion tests
CEN/TS 14425-5 : 2004 ADVANCED TECHNICAL CERAMICS - TEST METHODS FOR DETERMINATION OF FRACTURE TOUGHNESS OF MONOLITIC CERAMICS - PART 5: SINGLE-EDGE VEE-NOTCH BEAM (SEVNB) METHOD
CEN/TS 14425-1 : 2003 ADVANCED TECHNICAL CERAMICS - TEST METHODS FOR DETERMINATION OF FRACTURE TOUGHNESS OF MONOLITHIC CERAMICS - PART 1: GUIDE TO TEST METHOD SELECTION
DIN EN 820-3:2004-11 Advanced technical ceramics - Methods of testing monolithic ceramics - Thermomechanical properties - Part 3: Determination of resistance to thermal shock by water quenching
DIN EN 14425-3:2010-11 Advanced technical ceramics - Test methods for determination of fracture toughness of monolithic ceramics - Part 3: Chevron notched beam (CNB) method
EN 12923-1:2006 Advanced technical ceramics - Monolithic ceramics - Part 1: General practice for undertaking corrosion tests
DIN EN 843-3:2005-08 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 3: Determination of subcritical crack growth parameters from constant stressing rate flexural strength tests
DIN EN 820-1:2003-01 ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - THERMOMECHANICAL PROPERTIES - PART 1: DETERMINATION OF FLEXURAL STRENGTH AT ELEVATED TEMPERATURES
CEN/TS 820-5 : 2004 ADVANCED TECHNICAL CERAMICS - METHODS OF TESTING MONOLITHIC CERAMICS - THERMOMECHANICAL PROPERTIES - PART 5: DETERMINATION OF ELASTIC MODULI AT ELEVATED TEMPERATURES
DIN EN 843-2:2007-03 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 2: Determination of Young's modulus, shear modulus and Poisson's ratio
ENV 12923-2:2001 ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - PART 2: OXIDATION TEST

ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
MIL-HDBK-790 Base Document:1992 FRACTOGRAPHY AND CHARACTERIZATION OF FRACTURE ORIGINS IN ADVANCED
EN 623-4:2004 Advanced technical ceramics - Monolithic ceramics - General and textural properties - Part 4: Determination of surface roughness
EN 843-5:2006 Advanced technical ceramics - Mechanical properties of monolithic ceramics at room temperature - Part 5: Statistical analysis
ISO 4677-1:1985 Atmospheres for conditioning and testing Determination of relative humidity Part 1: Aspirated psychrometer method
ASTM C 1322 : 2015 : REDLINE PRACTICE FOR FRACTOGRAPHY AND CHARACTERIZATION OF FRACTURE ORIGINS IN ADVANCED CERAMICS
ISO 14704:2016 Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for flexural strength of monolithic ceramics at room temperature
ISO 3611:2010 Geometrical product specifications (GPS) — Dimensional measuring equipment: Micrometers for external measurements — Design and metrological characteristics
ISO 7500-1:2015 Metallic materials Calibration and verification of static uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring system
CEN/TS 843-6 : 2004 ADVANCED TECHNICAL CERAMICS - MONOLITHIC CERAMICS - MECHANICAL PROPERTIES AT ROOM TEMPERATURE - PART 6: GUIDANCE FOR FRACTOGRAPHIC INVESTIGATION
ISO 4677-2:1985 Atmospheres for conditioning and testing Determination of relative humidity Part 2: Whirling psychrometer method

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