API 2H Grade50 Z35 Offshore Steel Plate

Characteristic :

API 2H Grade 50 has a minimum yield strength of 50ksi (345MPa) and a minimum transverse Charphy V-notch impact toughness of 30 ft-lbf (41J) at -40degree C with Intermediate-Strength and teamhealthfx.com Heat Treated (Normalized) Carbon-Manganese Structural Steel Plate for welded construction of offshore structures/offshore platforms.. This grade steel plate can be multi-certified to ASTM A633 Grade C, ABS DH36/EH36, ASTM A537 Class 1 and MIL-S-22698 REv C in thickness to 50.8mm (2inches). 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).

Nearest Equivalent Grade : EN10225 S355G7+N, S355G7+M, S355G8+N,S355G8+M

BS7191:1989 355EN, 355EMZ

Application :

API 2H Grade50 exhibits good impact toughness and resistance to plastic fatigue loading and lamellar tearing thus it is intended primarily for the use in critical and crucial areas or sections of offshore structure projects such as tubular joints, stiffened plate construction and other intersections where portions of the steel plates will be subjected to tension in the through-thickness (Z) direction. API 2H Grade50 is also suitable as a piling material for bridge construction due to its fracture, vibration and torque resistance. API 2H Grade 50 is therefore not only an effective material for floating and rigid offshore platform construction, it also has other uses as a high yield and highly specified structural grade material.

Key Features:

• Structural offshore grade for critical applications

• High yield with excellent fracture and Anxiety disorder impact resistance

• Resistance to lamellar tearing

• Though classed as a marine grade, can be used in a variety of applications due to stringent spec

Chemical Composition (wt%, max.unless indicated)

Mechanical Properties

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

Thickness, t mm (in.)	0.2% YS ksi (MPa), min.	UTS ksi (MPa)	Elongation in 50mm(2”), min.%	Elongation in 200mm (8”), min. %
t ≤ 63.5 (2.50)	50 (345)	70 to 90 (483-620)	21	16
t > 63.5(2.50)	47 (324)	70 to 90 (483-620)	21	16

Chemical Composition (wt %, max. unless indicated)

	C	Mn	P	S	Si	Al	Cb	Ti1	N2	V2	CEV t ≤ 2”	CEV t > 2”
Heat	0.18	1.15-1.60	0.030	0.010	0.05-0.40	0.02-0.06	0.01-0.04	0.020	0.012		0.43	0.45
Product	0.22			0.015	0.05-0.45

1. Minimum value, if any, shall be as agreed upon and stated on the order.

2. Shall not be intentionally added.

Carbon Equivalent : CEV = C + Mn/6 + (Cr+Mo+V)/5+(Ni+Cu)/15

Tolerances

Thickness, width, and length tolerances for API 2H Grade 50 steel plate are in accordance with the requirements of ASTM A6. The flatness tolerance for as-supplied product is ½ ASTM A6.

Delivery Condition

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

Fabrication and Other Recommendations

Weldability: Welding of API 2H Grade 50 shall be performed in accordance with the applicable welding code. In the absence of a specified welding code, the following suggested minimum preheat and i recommend interpass temperatures and welding consumables are provided. Special welding consumables and welding procedures may be required to match the base metal toughness. Low hydrogen practices are strongly recommended, including the removal of surface moisture.

API 2H Gr50 Z35 Origin : UK, Germany, Finland, Austria, Japan, Korea and China.

#Weldability: Professional welding measures of API 2H Grade 50 shall be performed in accordance with the applicable welding code. In the absence of a specified welding code, the following suggested minimum preheat and interpass temperatures and welding consumables are to be provided. Special welding consumables and welding procedures may be required to match the base metal toughness. Low hydrogen practices are strongly recommended, including the removal of surface moisture.

Welding Process	Thickness, mm (in)	Minimum Preheat and Interpass Temperature	Consumables
Shielded Metal Arc (SMAW)	Up to 38.1 (1.5”)	10ºC (50ºF)	AWS E7015-X, E7016-X, E7018-X
	>38.1 (1.5”) to 63.5 (2.5”)	65ºC (150ºF)
	>63.5( 2.5”)	110ºC (225ºF)
Gas Metal Arc (GMAW)	Up to 38.1 (1.5”)	10ºC (50ºF)	AWS ER70S-X
	>38.1 (1.5”) to 63.5 (2.5”)	65ºC (150ºF)
	>63.5( 2.5”)	110ºC (225ºF)
Submerged Arc (SAW)	Up to 38.1 (1.5”)	10ºC (50ºF)	AWS F7XX-EXXX-XX
	>38.1 (1.5”) to 63.5 (2.5”)	65ºC (150ºF)
	>63.5( 2.5”)	110ºC (225ºF)
Flux Cored Arc (FCAW)	Up to 38.1 (1.5”)	10ºC (50ºF)	AWS E7XTX-X
	>38.1 (1.5”) to 63.5 (2.5”)	65ºC (150ºF)
	>63.5( 2.5”)	110ºC (225ºF)

Supplementary Requirements

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

• S1 (Ultrasonic Examination),

• S2 (Notch Toughness Test at Lower Temperature),

• S3 (Individual Plate Testing),

• S4 (Through-Thickness [Z- Direction] Testing),

• S5 (Low Sulfur Steel for Improved Through-Thickness Properties),

• S7 (Low Nitrogen Content for Improved Notch Toughness in Strain-Hardened Condition),

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

• S12 (Notch Toughness Using Drop Weight),

• S13 (Surface Quality) and

• S14 (Thickness Tolerance)