Engineering English
Heat Input
Manufacturing Engineering · Last updated: July 30, 2026 · How this entry was written
Definition: The amount of thermal energy transferred to the workpiece per unit length of weld, typically expressed in joules per millimeter or kilojoules per inch.
Example in context
“High heat input in submerged arc welding can lead to excessive weld metal dilution and poor mechanical properties.”
“Tozaltı kaynağında yüksek ısı girdisi, aşırı kaynak metali seyrelmesine ve zayıf mekanik özelliklere yol açabilir.”
Where engineers use it
Heat input is calculated from welding current, voltage, and travel speed. Engineers monitor it to control cooling rate and avoid hydrogen cracking or excessive distortion.
Synonyms: arc energy, heat input per unit length
Antonyms: heat dissipation
Practice: can you use “Heat Input” at work?
A welding engineer is troubleshooting a crack in a thick plate weld. They suspect excessive heat input caused a slow cooling rate and martensite formation.
Show a model answer
“Please verify the heat input for this weld procedure specification.”
“Heat Input” in 21 languages
| English | Heat Input |
|---|---|
| Turkish | ısı girdisi |
| French | apport de chaleur |
| German | Wärmeeinbringung |
| Spanish | aporte de calor |
| Chinese | 热输入 |
| Arabic | مدخلات الحرارة |
| Portuguese | aporte térmico |
| Russian | тепловложение |
| Japanese | 入熱 |
| Italian | apporto termico |
| Vietnamese | nhiệt đầu vào |
| Hindi | हीट इनपुट |
| Thai | ความร้อนที่ป้อนเข้า |
| Indonesian | masukan panas |
| Korean | 입열 |
| Bengali | তাপ ইনপুট |
| Dutch | warmte-inbreng |
| Swedish | värmetillförsel |
| Finnish | lämmöntuonti |
| Ukrainian | тепловкладення |
Frequently asked questions
What does Heat Input mean in engineering?
The amount of thermal energy transferred to the workpiece per unit length of weld, typically expressed in joules per millimeter or kilojoules per inch. In Manufacturing Engineering, the term carries a usage-frequency rating of 10/10 in the Engineering English library.
How do you pronounce Heat Input?
Heat Input is pronounced /hiːt ˈɪnpʊt/ (IPA). The Engineering English app plays audio for the term and checks your pronunciation with speech recognition.
How is Heat Input used in a sentence?
Example from an engineering context: “High heat input in submerged arc welding can lead to excessive weld metal dilution and poor mechanical properties.”
This entry is one of 7,806 terms in the Engineering English iOS app — with quizzes, spaced repetition and pronunciation checking.
Get the app on the App Store