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API 2W Steel Plate - American Alloy Steel
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API 2W Steel Plate

Overview API 2W Grade 50, Grade 50T & Grade 60

This grade is produced by the thermomechanical control process (TMCP) which yields a fine-grained steel with high strength combined with high toughness and excellent formability. The low carbon content and CEQ lead to excellent weldability. Toughness in the heat-affected zone (HAZ) and high resistance against cold cracking produce better welded structures. This can also be ABS certified.

Chemical Requirements

*Elements represented in percentage

Element API 2W
Grade 50 & 50T
API 2W
Grade 60
Carbon (Max.) 0.16 0.16
Manganese
 to 1½ in. incl. 1.15-1.60 1.15-1.60
over 1½ in. incl. 1.15-1.60 1.15-1.60
Phosphorus (Max.) 0.03 0.03
Sulfur (Max.) .010 .010
Silicon 0.05-0.50 0.05-0.50
Nickel (Max.) 0.75 1.0
Chromium (Max.) 0.25 0.25
Molybdenum (Max.) 0.08 0.15
Copper (Max.) 0.35 0.35
Titanium
 N ≤ 0.005 0.003-0.02 0.003-0.02
 N ≥ 0.005 0.007-0.02 0.007-0.02
Columbium, max. 0.03 0.03
Nitrogen, max. 0.012 0.012
Aluminum
 Acid soluble or 0.015-0.055 0.015-0.055
 total 0.02-0.06 0.02-0.06

Tensile Requirements

Property API 2W
Grade 50
API 2W
Grade 50T
API 2W
Grade 60
Yield Strength, ksi(MPa)
 t ≤ 1 in. (25mm) 50-75
(345-517)
50-80
(345-552)
60-90
(414-621)
 t ≥ 1 in. (25mm) 50-70
(345-483)
50-75
(345-517)
60-85
(414-586)
Tensile Strength, min., ksi(MPa) 65
(448)
70
(483)
75
(517)
Elongation in 2 in. (50 mm) min., % 23 23 22
Elongation in 8 in. (200 mm) min., % 18 18 16
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