1- A large slab of steel at a uniform tempering temperature of 200°C and suddenly quenching, and it surface temperature lowered to 70°C. calculate the required time when the temperature at a depth 4.0 cm has dropped to 120°C? Given: steel [k =45 W/m°C, a=1.4x10 m²/s, c=0.46 kJ/kg]
1- A large slab of steel at a uniform tempering temperature of 200°C and suddenly quenching, and it surface temperature lowered to 70°C. calculate the required time when the temperature at a depth 4.0 cm has dropped to 120°C? Given: steel [k =45 W/m°C, a=1.4x10 m²/s, c=0.46 kJ/kg]
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter6: Forced Convection Over Exterior Surfaces
Section: Chapter Questions
Problem 6.26P
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![1- A large slab of steel at a uniform tempering temperature of 200°C and suddenly
quenching, and it surface temperature lowered to 70°C. calculate the required time when
the temperature at a depth 4.0 cm has dropped to 120°C?
Given: steel [k =45 W/m°C, a=1.4x10 m²/s, c=0.46 kJ/kg]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd0576c44-4a0a-49e7-b33b-6a2640322b70%2Fb8b4c70f-1d18-490e-89a8-28d82e5e2418%2Ff3dxeho_processed.jpeg&w=3840&q=75)
Transcribed Image Text:1- A large slab of steel at a uniform tempering temperature of 200°C and suddenly
quenching, and it surface temperature lowered to 70°C. calculate the required time when
the temperature at a depth 4.0 cm has dropped to 120°C?
Given: steel [k =45 W/m°C, a=1.4x10 m²/s, c=0.46 kJ/kg]
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