Carbon Steel Technical Information

Carbon Steel Chemical Composition

Grades C Mn P S Si Cu Ni Cr Mo V
A105 – 0.60 – – 0.10 – – –
0.35 1.05 0.035 0.040 0.35 0.40 0.40 0.30 0.12 0.08

ASTM A350 Low-Temperature Carbon Steel Flange Material:

Grades C% Mn% Si% S% P% Cr% Ni%
A350 LF1 0.30 max 0.6/1.35 .15/.30 .040 max .035 max 0.30 max 0.40 max
A350 LF2 0.30 max 0.6/1.35 .15/.30 .040 max .035 max 0.30 max 0.40 max
A350 LF3 0.20 max 0.9 .20/.35 .040 max .035 max 0.30 max 3.3/3.7

ASTM A694 High-Yield Carbon Steel Flanges:

Grades C Mn P S Si
ASTM A694 F42 0.26-0.265 1.60-1.64 0.025-0.030 0.025-0.030 0.15-0.35
ASTM A694 F52 0.26-0.265 1.60-1.64 0.025-0.030 0.025-0.030 0.15-0.35
ASTM A694 F60 0.26-0.265 1.60-1.64 0.025-0.030 0.025-0.030 0.15-0.35
ASTM A694 F65 0.26-0.265 1.60-1.64 0.025-0.030 0.025-0.030 0.15-0.35

Carbon Steel Mechanical Properties

ASTM A105 High-Temperature Carbon Steel Flange Material:

Property ASTM A105 ASTM A350-LF2
Tensile Strength Min, psi 70,000 70,000-95,000
Tensile Strength Min, N/mm² 485 485-655
Yield Strength Min, psi 36,000 36,000
Yield Strength Min, N/mm² 250 250
Elongation (%) 22 22
Reduction of Area (%) 30 30
Hardness, maximum 187 15/12 ft-lbs
CVN at -50℉ 20/16 joules

ASTM A694 High-Yield Carbon Steel Flanges:

ASTM A694 Flange Material Grade Min Yield Strength (0.2 % Offset), in ksi [MPa] MinTensile Strength Elongation in 2 in. or 50 mm, min %
in ksi [MPa]
A694 F42 42 [290] 60 [415] 20
A694 F46 46 [315] 60 [415] 20
A694 F48 48 [330] 62 [425] 20
A694 F50 50 [345] 64 [440] 20
A694 F52 52 [360] 66 [455] 20
A694 F56 56 [385] 68 [470] 20
A694 F60 60 [415] 75 [515] 20
A694 F65 65 [450] 77 [530] 20
A694 F70 70 [485] 82 [565] 18