F593 Grades

There are seven groups within the F593 specification. Each group has its own unique chemical requirements and strength requirements. This page summarizes the similarities and differences between each of the groups. For more specific information, please refer to the actual ASTM F593 specification which can be purchased directly from ASTM International.

Alloy Group 1

Austenitic Alloys

Condition Marking Diameter Range  Tensile, ksi Yield, ksi min Rockwell Hardness 
AF F593A ¼ to 1-1/2 65 to 85 20 B85 MAX 
A F593B ¼ to 1-1/2 75 to 100 30 B65 to 95 
CW1 F593C ¼ to 5/8  100 to 150 65 B95 to C32 
CW2 F593D ¾ to 1-1/2 85 to 140 45 B80 to C32 
SH1 F593A ¼ to 5/8 120 to 160 95 C24 to C36 
SH2 F593B ¾ to 1 110 to 150 75 C20 to C32 
SH3 F593C 1-1/8 to 1-1/4 100 to 140 60  B95 to C30 
SH4 F593D 1-3/8 to 1-1/2 95 to 130 45 B90 to C28 

Alloy Group 2

Austenitic Alloys

Condition Marking Diameter Range  Tensile, ksi Yield, ksi min Rockwell Hardness 
AF F593E ¼ to 1-1/2 65 to 85 20 B85 MAX 
A F593F ¼ to 1-1/2 75 to 100 30 B65 to 95 
CW1 F593G ¼ to 5/8  100 to 150 65 B95 to C32 
CW2 F593H ¾ to 1-1/2 85 to 140 45 B80 to C32 
SH1 F593E ¼ to 5/8 120 to 160 95 C24 to C36 
SH2 F593F ¾ to 1 110 to 150 75 C20 to C32 
SH3 F593G 1-1/8 to 1-1/4 100 to 140 60  B95 to C30 
SH4 F593H 1-3/8 to 1-1/2 95 to 130 45 B90 to C28 

Alloy Group 3

Austenitic Alloys

Condition Marking Diameter Range  Tensile, ksi Yield, ksi min Rockwell Hardness 
AF F593J ¼ to 1-1/2 65 to 85 20 B85 MAX 
A F593K ¼ to 1-1/2 75 to 100 30 B65 to 95 
CW1 F593L ¼ to 5/8  100 to 150 65 B95 to C32 
CW2 F593M ¾ to 1-1/2 85 to 140 45 B80 to C32 
SH1 F593J ¼ to 5/8 120 to 160 95 C24 to C36 
SH2 F593K ¾ to 1 110 to 150 75 C20 to C32 
SH3 F593L 1-1/8 to 1-1/4 100 to 140 60  B95 to C30 
SH4 F593M 1-3/8 to 1-1/2 95 to 130 45 B90 to C28 

Alloy Group 4

Ferritic Alloys

Condition Marking Diameter Range  Tensile, ksi Yield, ksi min Rockwell Hardness 
AF F593X ¼ to 1-1/2 55 to 75 30 B85 MAX 
A F593N ¼ to 1-1/2 55 to 75 30 B85 MAX 
CW1 F593V ¼ to 5/8  60 to 105 40 B75 to 98 
CW2 F593W ¾ to 1-1/2 55 to 100 30 B65 to 95 

Alloy Group 5

Martensitic Alloys

Condition Marking Diameter Range  Tensile, ksi Yield, ksi min Rockwell Hardness 
H F593P ¼ to 1-1/2 110 to 140 90 C20 to 30 
HT F593R ¼ to 1-1/2 160 to 190 120 C34 to 45 

Alloy Group 6

Martensitic Alloys

Condition Marking Diameter Range  Tensile, ksi Yield, ksi min Rockwell Hardness 
H F593S ¼ to 1-1/2 125 to 150 100 C25 to 32 
HT F593T ¼ to 1-1/2 180 to 220 140 C40 to 48 

Alloy Group 7

Precipitation Hardening Alloys

Condition Marking Diameter Range  Tensile, ksi Yield, ksi min Rockwell Hardness 
AH F593U ¼ to 1-1/2 135 to 170 135 C28 to 38