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Subroutine MAP_STEEL_NPDR

  1. Provenance of code.
  2. Purpose of code.
  3. Specification.
  4. Description of subroutine's operation.
  5. References.
  6. Parameter descriptions.
  7. Error indicators.
  8. Accuracy estimate.
  9. Any additional information.
  10. Example of code
  11. Auxiliary subroutines required.
  12. Keywords.
  13. Download source code.
  14. Links.

Provenance of Source Code

H.K.D.H. Bhadeshia,
Phase Transformations Group,
Department of Materials Science and Metallurgy,
University of Cambridge,
Cambridge, U.K.

Added to MAP: August 1999.

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Purpose

To calculate the effect of iron powder on the nitrogen concentration in manual metal arc welds.

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Specification

Language:FORTRAN
Product form:Source code 

SUBROUTINE MAP_STEEL_NPDR(PDR,DN)

DOUBLE PRECISION PDR,DN

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Description

MAP_STEEL_NPDR gives the reduction in weld nitrogen concentration caused by the presence of iron powder in the coating of manual metal arc welds. It is calculated from the equation:

nitrogen reduction (ppm by weight) = 3.46 * Fe content (wt%).

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References

  1. H.K.D.H. Bhadeshia, unpublished work.

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Parameters

Input parameters

PDR - real
PDR is the iron powder content of the coating (weight percent).

Output parameters

DN - real
DN is the reduction in weld nitrogen concentration (parts per million by weight).

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Error Indicators

None.

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Accuracy

The typical error is ±15 ppm by weight.

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Further Comments

None.

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Example

1. Program text

      DOUBLE PRECISION PDR,DN
      WRITE(*,*) 'Enter Fe powder content of the coating (wt%):'
      READ (*,*) PDR
      CALL MAP_STEEL_NPDR(PDR,DN)
      WRITE (*,1) DN
      STOP
    1 FORMAT(//'Reduction in weld nitrogen concentration = ',F8.1,
     &         ' ppmw')
      END

2. Program data

 Enter Fe powder content of the coating (wt%):
 1.0

3. Program results

Reduction in weld nitrogen concentration =      3.5 ppmw

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Auxiliary Routines

None.

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Keywords

iron powder, nitrogen, concentration, manual metal arc, weld

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Download

Download source code

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