within 72 hours in accordance with ASTM E “Standard Test Method for specification compliance in ASTM E “Standard Practice for Using. industry references The American Society for Testing Materials (ASTM) Standard. E, “Practice for Using Significant Digits in Test Data to Determine. ASME中国制造-ASTM E (原文)_化学_自然科学_专业资料。Designation: E29? 13 An American National Standard Standard Practice for.

Author: | Dar Negor |

Country: | Azerbaijan |

Language: | English (Spanish) |

Genre: | Finance |

Published (Last): | 7 November 2017 |

Pages: | 182 |

PDF File Size: | 16.53 Mb |

ePub File Size: | 11.76 Mb |

ISBN: | 477-9-75053-119-7 |

Downloads: | 91401 |

Price: | Free* [*Free Regsitration Required] |

Uploader: | Didal |

A number in parentheses indicates the year of last reapproval.

This standard has been approved for use by agencies of the Department of Defense. Its aim is to outline methods which should aid in clarifying the intended meaning of speci?

Dimensional quantities in the practice are presented only as illustrations of calculation methods. The examples are not binding on products or test methods treated.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Current edition approved Aug. Originally approved in Last previous edition approved in as E29 — The Modern Metric System 3.

It should not be inferred that a measurement value is precise to the number of signi? For example, the number 0. Zeros trailing the last nonzero digit for numbers represented with a decimal point are signi? For example, the numbers For example, a modulus strength, stated as Pa, may have as few as two or as many as six signi?

Thus, kPa without the decimal point indicates that the modulus is reported either to the nearest 10 or 1 kPa, which is ambiguous with respect to the number of signi?

In the applications of this practice to a speci? In the absence of such speci? The choice of method depends upon the current practice of the particular branch of industry or technology concerned, and should therefore be speci?

Thus, any deviation, however small, outside the speci? This will be referred to as the absolute method, which is discussed in Section 5. This will be referred to as the rounding method,which is discussed in Section 6. Under these conditions, the speci? Conformance or nonconformance with the speci?

For purposes of determining conformance with these speci? The rounded value should then be compared with the speci? The following applies to speci? Increase by 1 the digit in the last place retained, if there are non-zero digits beyond this 5. When rounding a number to one having a speci?

If two choices are possible, as when the digits dropped are exactly a 5 or a 5 followed only by zeros, choose that ending in an even digit. Table 1 gives examples of applying this rounding procedure. In order to round to the nearest 50, 5, 0.

For example, in rounding 6 to the nearest 50, 6 is doubled giving 12 which becomes 12 when rounded to the nearest 6. When 12 is divided by 2, the resulting number, 6is the rounded value of 6 Tensile Requirements Astmm strength, psi Yield point, min, psi Elongation in 2 in.

### ASME中国制造-ASTM E (原文)_百度文库

In such cases, the following procedure can be used for rounding to any interval: NOTE 2—Using a calculation subroutine that has been programmed to perform the rounding procedure described in 6. As far as is practicable with the calculating device or form used, carry out calculations with the observed values exactly and round only the? The applicable standard deviation is the repeatability standard deviation. The rounding interval for test results should not be greater than 0.

An alternative statement of the suggested rule is: Write down the standard deviation. Round test results to the place of the? A test result is calculated as 1. The standard deviation of the test method is estimated to be, 0. Rounding this value to the nearest whole number gives a value of 4, based on the information in 6. Multiplying 4 by 0. Guidelines for Retaining Signi?

## Excel: Round 0.5 towards Even Per ASTM-E29

Any approach to retention of signi? The number of signi? The following guidelines are intended to preserve the data for statistical summaries. For certain purposes, such as where calculations involve differences of measurements close in magnitude, and for some statistical calculations, such as paired t-tests, autocorrelations, and nonparametric tests, reporting data to a greater number of signi?

For example, if a buret is graduated in units of 0. When the measuring device has a vernier scale, the last digit recorded is the one from the vernier.

Rounding so that w is below 0. Digits of ln x or log10 x are signi? The conversion constant, ASTM Manual 7 provides methods for reporting x? Reporting s to within 0.

Analyses on six specimens give asttm of 3. The average and standard deviation, unrounded, are x? The suggested rule would report x?

That is, the rounding unit for the speci? When the number of observations is large more than 15 8. ASTM International 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? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International 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. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Permission rights to photocopy the standard may also be secured from the ASTM website www.