EN 10225 Grade S355G5 thermomechanically rolled (+M)

TAGS: EN 10225 | Grade S355G5 | marine platform steel plate | Steel for marine engineering | structural steel |

EN 10225 Grade S355G5 thermomechanically rolled (+M)

EN 10225 is a European standard that specifies technical delivery conditions for weldable structural steels used in the fabrication of offshore structures. The standard provides requirements for various aspects of steel used in offshore applications, including chemical composition, mechanical properties, heat treatment, and delivery conditions.

EN 10225 covers a range of steel grades suitable for different types of offshore structures, such as fixed offshore structures, floating offshore structures, and mobile offshore units. These structures can include platforms, jackets, topsides, subsea structures, and other components used in the offshore industry.

The standard defines different steel grades based on their minimum yield strength, ranging from S355 to S690. Each grade has specific requirements for toughness, weldability, and impact resistance to ensure the structural integrity and safety of offshore installations.

EN 10225 Grade S355G5 is a weldable structural steel primarily used in the fabrication of offshore structures. Here is some information regarding this grade:

Chemical Composition:

Carbon (C): maximum 0.18%

Silicon (Si): maximum 0.50%

Manganese (Mn): 1.50% - 2.00%

Phosphorus (P): maximum 0.025%

Sulfur (S): maximum 0.015%

Chromium (Cr): minimum 0.30%

Molybdenum (Mo): minimum 0.08%

Mechanical Properties (at ambient temperature):

Minimum Yield Strength (Reh): 355 MPa

Minimum Tensile Strength (Rm): 470 - 630 MPa

Elongation (A): minimum 22%

Charpy V-notch Impact Test: 0°C at 27 Joules minimum

Heat Treatment:

EN 10225 Grade S355G5 thermomechanically rolled (+M) undergoes a thermomechanical rolling process to obtain its specific mechanical properties. This process involves controlled deformation and cooling to enhance the material's strength and toughness.

Delivery Conditions:

The steel is supplied in normalized or normalized rolled condition.

The delivery condition may also be specified as "+N" (normalized) or "+M" (normalized rolled).

Property	Value	Comment
Carbon equivalent (CEV)	0.43 [-] Show Supplier Material materials with Carbon equivalent (CEV) of 0.43 [-]	Cast
Carbon equivalent note	CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Cu+Ni)/15 and PCM = C + Si/30 + (Cr+Mn+Cu)/20 + Ni/60 + Mo/15 + V/10 + 5B

Property	Temperature	Value	Comment
Charpy impact energy	-20 °C	50 J Show Supplier Material materials with Charpy impact energy of 50 J	min. | for thickness 5-20 mm
Elongation		22 % Show Supplier Material materials with Elongation of 22 %	min. A5.65√So | for thickness 5-20 mm | Transverse
Tensile strength		470 - 610 MPa Show Supplier Material materials with Tensile strength of 470 - 610 MPa	for thickness 5-20 mm | Transverse
Yield strength		345 MPa Show Supplier Material materials with Yield strength of 345 MPa	min. | for thickness 16-20 mm | Transverse
		355 MPa Show Supplier Material materials with Yield strength of 355 MPa	min. | for thickness 5-16 mm | Transverse

Property	Value	Comment
Aluminium	0.02 % Show Supplier Material materials with Aluminium of 0.02 %	min | for thickness 5-20 mm
Carbon	0.14 % Show Supplier Material materials with Carbon of 0.14 %	max. | for thickness 5-20 mm
Manganese	1.6 % Show Supplier Material materials with Manganese of 1.6 %	max. | for thickness 5-20 mm
Molybdenum	0.2 % Show Supplier Material materials with Molybdenum of 0.2 %	max. | for thickness 5-20 mm
Nickel	0.3 % Show Supplier Material materials with Nickel of 0.3 %	max. | for thickness 5-20 mm
Niobium	0.05 % Show Supplier Material materials with Niobium of 0.05 %	max. | for thickness 5-20 mm
Nitrogen	0.015 % Show Supplier Material materials with Nitrogen of 0.015 %	max. | for thickness 5-20 mm
Phosphorus	0.035 % Show Supplier Material materials with Phosphorus of 0.035 %	max. | for thickness 5-20 mm
Silicon	0.5 % Show Supplier Material materials with Silicon of 0.5 %	max. | for thickness 5-20 mm
Sulfur	0.03 % Show Supplier Material materials with Sulfur of 0.03 %	max. | for thickness 5-20 mm
Titanium	0.05 % Show Supplier Material materials with Titanium of 0.05 %	max. | for thickness 5-20 mm
Vanadium	0.1 % Show Supplier Material materials with Vanadium of 0.1 %	max. | for thickness 5-20 mm

Property
Application areas	Offshore structures such as platforms and equipment for new offshore windmill towers.
Chemical composition	A ratio Al/N ≥ 2 shall be applied The above chemical properties are based on cast analysis data. Product analysis may be requested at the time of order.
Delivery condtion	For the dimensions available please visitDimension tables (see Table A). Table A with a thickness range as indicated in the Mechanical properties.
Other	Available options Options available (after previous agreement): Ultrasonic testing Reduced carbon equivalent (CEV) or parameter crack measurement (PCM) value Transversal impact test Improved deformation properties perpendicular to the surface of the product as per EN 10164 (Z test) Post-weld heat treatment test (PWHT) Other options specified in the standard