Grade Information

Mechanical Properties

 

Standard

Grade

Size (inches)

Tensile, ksi

Yield, ksi min

Yeild, MPa min

Elong. % min

RA % min

F1554

36

1/2"-4"

58-80

36

248

23

40

 

 

F1554

 

 

55

1/2"-2"

 

 

75-95

55

380

21

30

2-1/4-2-

1/2"

22

2-3/4"-3"

20

3-1/4"-4"

18

F1554

105

1/2"-3"

125-150

105

724

15

45

A193

B7

1/2"-2-1/2"

125

105

 

16

50

2-3/4"-4"

115

95

 

Chemical Properties

 

Element

36

Grade 55/105

Grade B7

< .76"

.76"-1.5"

> 1.5"

Carbon (max)

.26%

.27%

.28%

 

.37-.49%

Manganese

 

.60%-.90%

 

.65-1.10%

Phosphorus (max)

.04%

.04%

.035%

Sulfur (max)

.05%

.05%

.04%

Copper (min)

.20%

.20%

 

 

 

-If your print calls for SI Grade 55 we must know at the time the order is placed. If not specified, the Grade 55 may not be weldable.

-When Grade 36 is specified, a weldable Grade 55 may be furnished at the supplier's option.

-This sheet is for informational purposes only. Please consult your blueprint or engineer before selecting the proper grade.