N = D² / (4λ), λ = c / f
Worked example 10 mm, 5 MHz probe on steel N = 21.19 mm reliable far field from 3N = 63.56 mm
NDT calculators · MAT
Carbon equivalent, preheat, heat input, hardness and weld metal. Each of the 10 shows the governing formula, a worked example and the standard it comes from.
2 work without an account; the other 8 open with a free member account. Join free or sign in.
N = D² / (4λ), λ = c / f
Worked example 10 mm, 5 MHz probe on steel N = 21.19 mm reliable far field from 3N = 63.56 mm
Carbon equivalent, preheat, heat input, hardness and weld metal.
MAT Welding
Calculates the IIW carbon equivalent, the Ito-Bessyo Pcm cracking parameter and the EN 1011-2 CET from steel chemistry, with a weldability band.
EN 10025 · API Free
MAT Hardness and pipe data
Converts between HV, HBW, HRC, HRB and HK for non-austenitic steels using the ASTM E140 conversion tables, with an indicative tensile strength.
ASTM E140 Free
MAT Hardness and pipe data
Looks up outside diameter, wall thickness, bore, metal area, mass per metre and contained volume for ASME B36.10M and B36.19M pipe schedules.
ASME B36.10M · ASME B36.19M
MAT Welding
Calculates arc energy and heat input in kJ/mm from arc voltage, current and travel speed, applying the EN 1011-1 thermal efficiency factor for the process.
EN 1011-1 · ASME IX
MAT Welding
Calculates minimum preheat for ferritic steel from CET, combined thickness, diffusible hydrogen and heat input using the EN 1011-2 Method B equation.
EN 1011-2 · ISO 3690
MAT Welding
Computes the WRC-1992 Creq and Nieq from weld metal chemistry and gives the predicted solidification mode, ready to plot on the WRC-1992 diagram for Ferrite Number.
AWS A4.2 · ISO 8249
MAT Welding
Computes the Larson-Miller tempering parameter for a heat treatment and converts a soak at one temperature to the equivalent time at another.
ASME VIII
MAT Hardness and pipe data
Converts the two measured diagonals of a Vickers indentation and the test force into HV, with the ISO 6507-1 diagonal-difference check.
ISO 6507-1 · ASTM E92
MAT Welding
Calculates groove cross-section, deposited weld metal mass and the filler quantity to purchase, from joint geometry, weld length and process deposition efficiency.
General engineering
MAT Hardness and pipe data
Converts a measured Brinell indentation diameter, ball diameter and test force into HBW, with the ISO 6506-1 indentation-ratio and load-diameter checks.
ISO 6506-1 · ASTM E10
Check the spelling, try a method code such as UT or RT, or clear the filters.
193 calculations with worked examples
955 discussions · 382 answers