API 2W Grade 50T Steel Plate

API 2W Grade 50T steel plate is produced in accordance with the fifth edition (December 2006) of API’s Specification 2W. This specification allows for the production of intermediate strength steel plate utilizing Thermo-Mechanical Control Processing (TMCP). Depending on customer preference, API 2W can normally be directly substituted for plate ordered to API Specification 2H or API Specification 2Y. In many situations, customers actually prefer API 2W because due to its low-carbon content it offers superior weldability to that of either API 2H or API 2Y.

API Monogram

RELIABLE PIPES & TUBES LTD. API 2W Grade 50T plate is licensed by the American Petroleum Institute to carry the API monogram.

Typical Applications

API 2W Grade 50T steel plates are intended for fabrication primarily by cold forming and welding. Plate produced to this specification is used for welded construction of offshore structures in selected critical sections that must exhibit good impact properties and resistance to fatigue and lamellar tearing.

Available Sizes

Thickness range: 14mm to 55 mm

Inquire >55 mm to 100 mm

Width range: 1800 mm to 3200 mm

Length: 6000mm to 12000mm

Inquire >3200mm to 3900mm and over 12000mm length.

Flatness

Guaranteed to meet ½ ASTM A6 flatness tolerances.

Composition (a, e) (Heat Analysis wt %)

C	Mn (b)	P	S	Si	Ni	Cr	Mo	Cu
0.16	1.15-1.60	0.03	0.010	0.05-0.50	0.75	0.25	0.08	0.35

Ti	Cb	N (c,d)	Al acid sol.		Al total	B
0.007-0.02	0.03	0.012	0.015-0.055		0.02-0.06	0.0005

(a) Values are maximums unless a range is shown.

(b) Mn up to 1.65% (heat analysis) is permitted at the option of the material manufacturer.

(d) Nitrogen may be 0.013% max., if titanium is 0.010 to 0.012%.

(e) Vanadium, zirconium, cerium and other rare earth metals shall not be added without specific approval of the purchaser.

Carbon Equivalent maximums
Thickness	CE	Pcm
To 1½ in. (40 mm) incl.	0.39	0.22
Over 1½ in. (40 mm) to 3½ in. (150 mm) incl.	0.41	0.23

Formula	CEIIW = C + Mn/6 + (Cr + Mo + V)/5 +(Ni + Cu)/15
	Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B
Tensile Properties (Transverse)
Yield Strength, ksi (MPa)
t ≤ 1 in. (25 mm)		50- 75 (345 - 517)
t > 1 in. (25 mm)		50 - 70 (345 - 483)
Tensile Strength, min., ksi (MPa)		65(448)
% Elongation in 2 in. (50 mm), min.		23
% Elongation in 8 in. (200 mm), min.		18

Charpy Impact Properties

One Charpy V-notch test, consisting of three transverse specimens, is made on each plate rolled that is produced by TMCP. The specimens are taken from the mid-width and mid-thickness locations of the plate. Due to the low carbon and sulfur contents of API 2W plates, the energy of the full-size specimens will often exceed the limits of ASTM E23; therefore, sub-sized specimens are allowed per the following table:

Specimen Size	Min. Avg. Energy	Min. Single Value	Test Temp.
mm	ft-lbs (J)	ft-lbs (J)	F (oC)__
10 x 10	30 (41)	25 (34)	-40 (-40)
7.5 x 10	30 (41)	25 (34)	-40 (-40)
5.0 x 10	30 (41)	25 (34)	-40 (-40)
7.5 x 10	23 (31)	19 (26)	-50 (-46)
5.0 x 10	15 (20)	13 (18)	-80 (-62)

Supplementary Requirements

By agreement between the purchaser and the plate manufacturer, the following Supplementary Agreements may be specified on purchase order:

S1 (Ultrasonic Examination),

S3 (Additional Tensile Testing),

S4 (Through-Thickness (Z-Direction) Testing),

S5 (Low Sulfur Content),

S7 (Low Nitrogen Content)

S8 (Strain Aged Charpy V-Notch Impact Tests),

S11 (Preproduction Qualification),

S12 (Drop Weight).

Typical as-rolled and 5% strain aged at 480?F (250?C) Charpy values of GLORIASTEEL plate at 1.500” and 2.000” nominal gauges are as follows:

			5% Strain Aged
		TCVN @ -50 oF	TCVN @ -50 oF
Plate t, in.	Position	(-46 oC) (ft-lbs)	(-46 oC) (ft-lbs)
1.500	Lead	196-180-192	196-184-200
	Tail	110-116-120	144-146-156
2.000	Lead	124-120-136	146-144-140
	Tail	120-120-136	146-130-130