Welding Heat Input Calculator
Q = k × (U × I) / v
Input Mode:
Range
Exact Value
Input Parameters
k value:
SMAW (111) - Manual metal arc welding (k=0.8)
SMAW (114) - Self-shielded tubular-cored arc welding (k=0.8)
SAW (121) - Submerged arc welding (k=1)
GMAW (131) - MIG welding with solid wire electrode (k=0.8)
GMAW (135) - MAG welding with solid wire electrode (k=0.8)
GMAW (136) - MAG welding with flux cored electrode (k=0.8)
GMAW (138) - MAG welding with metal cored electrode (k=0.8)
GTAW (141) - TIG welding with solid filler material (k=0.6)
GTAW (142) - Autogenous TIG welding (k=0.6)
GTAW (143) - TIG welding with tubular cored filler material (k=0.6)
GTAW (145) - TIG welding using reducing gas and solid filler material (k=0.6)
PAW (15) - Plasma arc welding (k=0.6)
ASME IX (k=1)
Custom k value (optional):
Voltage Range (V):
Voltage (V):
Current Range (A):
Current (A):
Speed Range:
cm/min
mm/min
mm/sec
Speed:
cm/min
mm/min
mm/sec
Impact and Hardness Testing Required?
No
Yes
Manual Input Range (kJ/mm):
Clear
Calculate Heat Input
Results
Lowest Heat Input (Q):
kJ/mm
Highest Heat Input (Q):
kJ/mm
Heat Input (Q):
kJ/mm
When impact and hardness testing is required:
Adjusted Lowest Q (75% of exact):
kJ/mm
Adjusted Highest Q (125% of exact):
kJ/mm
Recommended Range:
kJ/mm
Manual input range for testing:
Adjusted Lowest Q (75% of lowest heat input):
kJ/mm
Adjusted Highest Q (125% of highest heat input):
kJ/mm
