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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.

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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.



Purpose

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

 

Specification

 Language:    FORTRAN
 Product form:Source code

SUBROUTINE MAP_STEEL_NPDR(PDR,DN)

DOUBLE PRECISION PDR,DN

 

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%).

 

References

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 H.K.D.H. Bhadeshia, unpublished work.

 

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).

 

Error Indicators

None.

 

Accuracy

The typical error is 15 ppm by weight.

 

Further Comments

None.

 

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

 

Auxiliary Routines

None.

 

Keywords

iron powder, nitrogen concentration, manual metal arc weld

 

Download

Download source code

 

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                        the University of Cambridge.

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