API 2W Grade50 Offshore Steel Plate

Nearest Equivalent Grade :

API 2H, EN10225 S355G7+N, S355G7+M, S355G8+N,S355G8+M, BS7191:1989 355EN, 355EMZ

Characteristic :

API 2W Grade50, produced via TMCP-Thermo-Mechanical Control Processing, is an Intermediate-Strength Structural Steel Plate for welded construction of offshore structures/offshore platforms. API 2W Grade 50 has a minimum yield strength of 50ksi (345MPa) and a minimum, mid-thickness, transverse Charphy V-notch impact toughness of 41J (30 ft-lbf) at -40ºC (-40ºF). API 2H Gr50 is an offshore steel grade which is regulated by American Petroleum Institute (API) and in some cases certified by the American Bureau of Shipbuilding (ABS).

Delivery Condition :

API 2W Grade50 has undergone TMCP-Thermo-Mechanical Control Processing; a rolling method in which strict control of both reduction and rolling temperatures with accelerated cooling control temperature in order to provide the 1 health rx specified mechanical properties.

Application :

API 2W Grade 50, a steel grade which is intended primarily for the use in critical heat affected areas or sections of offshore structure projects for it provides good toughness at the heat affected zone (HAZ). It is crucial to be used in tubular joints, stiffened plate construction and impotence definition medical other intersections where portions of how do you get high cholesterol the steel plates will be subjected to tension in the through-thickness (Z) direction. API 2W Grade 50 is therefore not only an effective material for floating and rigid offshore oil and gas platforms, but also crucial to be used within intersections of the structure due to its superior strength combined with good impact toughness which resists fatigue and lamellar tearing.

Key Features:

• Good impact resistance in heat affected zone (HAZ)

• Structural offshore grade for critical applications

• Lower carbon content for improved weldability

• Thermo-mechanically rolled for extra strength and toughness

• Resistance to lamellar tearing

Chemical Composition (wt%, max.unless indicated)

Mechanical Properties

Tensile Testing is performed transverse direction according to API 2W requirement. The minimum values are tabulated below :

Thickness, t mm [in.]	0.2% YS MPa [ksi]	UTS MPa [ksi], min.	Elongation in 50mm[2”], min.%	Elongation in 200mm (8”), min. %
t ≤ 25.4 [1.00]	345-517 [50-75]	448 [65]	23	18
t > 25.4 [1.00]	345-483 [50-70]	448 [65]	23	18

Charpy V-notch Impact Testing

Charpy V-notch Impact Testing is performed on each plate using mid-thickness, mid-width, transverse specimens tested in accordance with ASTM A673. The producer has the option of testing sub-size specimens to any of the combinations of specimen size, energy requirement, and test temperature as shown below:

Specimen Size, mm	Specimen Size in.	Minimum Average Energy J [ ft-lb ]	Minimum Single Value Energy J [ ft-lb ]	Test Temperature ºC [ºF]
10 x 10	0.394 x 0.394	41 [30]	34 [25]	-40 [-40]
7.5 x 10	0.295 x 0.394	41 [30]	34 [25]	-40 [-40]
5 x 10	0.197 x 0.394	41 [30]	34 [25]	-40 [-40]
7.5 x 10	0.295 x 0.394	31 [23]	26 [19]	--46 [-50]
5 x 10	0.197 x 0.394	20 [15]	18 [13]	-62 [-80]

Chemical Composition (Heat Analysis, wt %, max. unless indicated)

C	Mn1	P	S	Si	Al Total	Ni	Cr	Mo	Cu	Ti	Cb	N2,3	B2
0.16	1.15-1.60	0.03	0.010	0.05-0.50	0.020-0.060	0.75	0.25	0.08	0.35	0.007-0.02	0.03	0.012	0.0005

1. Manganese up to 1.65 (heat analysis) is permitted at the option of the material manufacturer

2. Nitrogen and Boron shall not be intentionally added

3. Nitrogen may be 0.013% max., if titanium if 0.010 to 0.012%

CEV=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

TMCP Structural Steel

Thickness, t, mm [in.]	CEIIw Max	Pcm Max	CEiiw typical	Pcm Typical
≤ 40 [1.5] 40 < t ≤ 90 [1.5 < t ≤ 3.5]	0.39	0.22	0.36	0.16
	0.41	0.23	na	na

Tolerances

Thickness, width, and length tolerances for API 2W Grade 50 steel plate are in accordance with the requirements of

ASTM A6. The flatness tolerance for as-supplied product is 1⁄2 ASTM A6.

Delivery Condition

API 2H Grade 50 is supplied in the normalized condition.