CEMP-E
TI 809-26
1 March 2000
Minimum
Material Thickness of
Preheat and
Category
Structural Steel
Thickest Part at Point of
Interpass
Welding
Temperature
3 to 19 mm (incl.)
10oC (50oF)
(1/8 to 3/4 in.)
C
over 19 to 38.1 mm (incl.)
66oC (150oF)
Shapes and Plates
When using
(3/4 to 1-1/2 in.)
A572, grades 60 and 65
SMAW with low-
A709, grade 70W2
over 38.1 to 63.5 mm
107oC
A852, grades 702
electrodes, or
(incl.)
(225oF)
A913, grades 60 and 65
FCAW, GMAW or
(1-1/2 to 2-1/2 in.)
SAW
over 63.5 mm
150oC
(2-1/2 in.)
(300oF)
D
When using
SMAW with low-
Shapes and Plates
electrodes, or
A913, Grades 50, 60, and
all thicknesses
0oC (32oF)1
FCAW, GMAW or
65
SAW, with
electrodes of
class H8 or
lower
- If the steel is below 0oC (32oF), the steel, in the vicinity of welding, must be raised to and
1
maintained at a minimum temperature of 21oC (70oF) prior to and during welding.
- Maximum preheat and interpass temperature of 200oC (400oF) for thicknesses up to 40 mm
2
(1-1/2 inches) inclusive, and 230oC (450oF) for thickness greater than 40 mm (1-1/2 inches).
3-4
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