Structural steel plate

Sunny Steel supplies high quality structural steel grade carbon steel plates to a variety of global industries.

Our materials offer high yield and high strength and can be supplied with numerous finishes and testing options. Please refer to the information below detailing markets which we currently supply steel to with links to grades and technical information.

This means we can cut your structural plate to your exact requirements.

The Construction Industry

High tensile strength and yield strength steels including S235, S275 and S355 with Charpy impact testing at different temperatures.

The Offshore Industry

Offshore structural steel grades for the building of offshore platforms including S355, S420 and S460.

The Shipbuilding Industry

High quality shipbuilding structural plate including AH36, DH36 and EH36 supplied under the ASTM A131/ASME SA131 specification.

Construction Steels

Our structural grade steel plates are used in civil engineering projects, and this supply also crosses over into the offshore, shipbuilding and high strength steel sectors.

As part of our services to the construction industry we also supply a wide range of pre–fabricated steel sections.

S460NL & S460ML

Unlike any other structural specification under EN10025 S460 material does not have any direct equivalents in ASTM or Shipbuilding (ABS/BV/LR) designations.

S460NL & S460ML is used in a number of offshore and onshore applications e.g. legs supports for a jack up platform offshore and as mooring piles for a LNG onshore terminal.

S460NL
A normalised material with a minimum yield strength of 450 N/mm2 that has been impact tested at -50°C. S460NL is produced under European designation EN10025-3.

S460ML
A thermo-mechanically rolled material with a minimum yield strength of 450 N/mm2 that has been impact tested at -50°C. S460ML is produced under European designation EN10025-4 (TMCP).

Sunny Steel are able to supply a wide range of S460 material (in both normalised and TMCP conditions), our material ranges from 6mm to 80mm thick and up to 3 metre’s wide and 12 metre’s in length.

Chemical Composition of S460NL & S460ML

GRADE	C	SI	MN	P	S	N	AL	CU	CR	NI	MO	NB	V	TI
S460NL	0.20	0.60	1.00/1.70	0.025	0.020	0.025	0.020	0.55	0.30	0.80	0.10	0.050	0.20	0.05
S460ML	0.16	0.60	1.70	0.025	0.025	0.025	0.020	0.55	0.30	0.80	0.20	0.05	0.12	0.05

S355JR, S355AR & S355J2/K2+N

S355 – a structural grade steel with a minimum yield strength of 355 N/mm².

Commonly used in the engineering and construction industry, S355 offers high yield and tensile strength and is supplied with a variety of treatments and test options making it a highly usable steel in your construction project.

About S355 Common Steels

S355JR
A structural grade (S) with at minimum yield strength of 355 N/mm²m, the JR designation confirms that the steel has undergone longitudinal Chary V-Notch impact testing at 27J (Joules) at room temperature. Other Charpy designations include JO, J2 and K2.

S355AR
A structural grade (S) with the same minimum yield strength of 355 N/mm²m, but supplied in an ‘as rolled condition’.

S355J2/K2+N
As S355JR but Charpy tested at 40J (Joules) at -20°C and supplied in the normalised condition.

The above steels represent only a small example of the quality range of S355 steels available for supply from Sunny Steel.

Chemical composition of S355

GRADE	C	MN	SI	P	S	N	CU
S355	0.24	1.60	0.55	0.040	0.040	0.012	0.55

S275JR & S275AR

S275 – a high strength and high yield structural steel used extensively throughout the construction industry.

Our steels, of Western European origin, are produced to the highest quality and are a perfect material for your civil engineering projects.

About S275 Common Steels

S275JR
A structural grade (S) with at minimum yield strength of 275 N/mm²m, the JR designation confirms that the steel has undergone longitudinal Chary V-Notch impact testing at 27J (Joules) at room temperature. Other Charpy designations include JO, J2 and K2.

S275AR
A structural grade (S) with the same minimum yield strength of 235 N/mm²m, but supplied in an ‘as rolled condition’.

S275 structural steel plate is a versatile material which can be used in a wide range of construction and engineering applications.

Chemical Composition of S275

GRADE	C	MN	P	S	N	CU
S275	0.21/0.22	1.50	0.040	0.040	0.012	0.55

S235JR & S235AR

Civil engineers and the construction industry in general place heavy demands on the specification and quality of structural steel now used in the construction marketplace. Sunny steel are able to meet these demands with a range of S235 structural steel plates to suit your specific requirements.

About S235 Common Steels

S235JR

A structural grade (S) with at minimum yield strength of 235 N/mm²m, the JR designation confirms that the steel has undergone longitudinal Chary V-Notch impact testing at 27J (Joules) at room temperature.

S235AR
A structural grade (S) with the same minimum yield strength of 235 N/mm²m, but supplied in an ‘as rolled condition’.

S235 has good high yield and tensile strength though this strength suffers if the material is heat treated at temperatures exceeding 600°C

Chemical Composition of S235

GRADE	C	MN	P	S	N	CU
S235	0.17/0.20	1.40	0.040	0.040	0.012	0.55

Offshore Steels

Predominantly, offshore structures are built specifically for drilling oil and gas deposits deep under the sea bed. Whilst applications will vary, all will have exposure to the effects of salt water corrosion, powerful sea currents often dictated by the tides and strong winds. Our search for natural fuel resources has stretched into even more inaccessible areas such as the Arctic which has also resulted in rigs drilling at much greater depths and hence lower temperatures.

Structures in harsh working environments like these require a specific range of steels to promote greater safety, longer working life and reduce the risk of failure which in certain cases could prove disastrous.

Offshore Steel Characteristics:

• High yield strength
• Excellent weldability
• Good internal soundness
• Good resistance to brittle fracture (longitudinal and transverse)
• Low phosphorus and sulphur contents
• High resistance to lamellar tearing

S355G7+M/+N

S355G7 is a structural grade steel supplied to the offshore industry. The material can be delivered as normalised (N) or thermo-mechanically rolled (M). Supplied in accordance with EN10225:2001, the steel offers good tensile and yield strength.

As an offshore steel grade, S355G7 is used in a variety of applications including the building of offshore platforms. Please refer to the technical information for S355G7.

S355G8+M/+N

S355G8 comes under the standard EN10225:2001 which the technical delivery condition for weldable steels for fixed offshore structures.

S355G8 can either be normalised (N) or thermo-mechnically rolled (M) and is a structural grade offering good tensile and yield strength. The steel is used throughout the offshore oil and gas industry in the construction of structures and platforms.

Please refer to the technical information below for S355G8+M and S355G8+N.

S355G9+M/+N

S355G9 – an offshore quality structural steel used in the offshore industry.

Supplied under the EN10225:2001 standard, the material shows good tensile and yield strength and has good weldability. The steel is used throughout the offshore industry in the building of offshore steel structures & platforms which are subjected to some of the harshest weather conditions.

Please refer to the chemical composition and mechanical properties below for S355G9+M and S355G9+N.

S355G10+M/+N

We supplies S355G10 offshore grade steel in both normalised (N) and thermo-mechanically rolled (M) condition.

Produced to the euro norm standard EN10225:2001,the specification governing weldable structural steels for offshore structures, S355G10 has good tensile and yield strength.

The steel can be supplied as heavy plates or as pre-fabricated sections.

S420G1+Q/+M

S420G1 is an offshore structural grade steel. The material can be delivered as quenched (Q) or thermo-mechanically rolled (M). We supply the material in accordance with EN10225:2001.

S420G1 has good yield and tensile strength and is used in the construction of offshore platforms and oil rigs.

S420G2+Q/+M

Supplied to the offshore industry as a structural steel grade, S420G2 is a high tensile and high yield steel used in the construction of oil rigs and offshore service platforms.

Complying with EN10025:2001, the material is supplied as either S420G2+M (thermo–mechanically rolled) or S420G2+Q (Quenched). We supply offshore marine grades such as S420G2 from stock or directly shipped from the mill to clients around the world.

S460G1+Q/+M

Offshore steel grade S460G1 is supplied under the specification EN10225:2001.

The steel which is available in either quenched (Q) or thermo-mechanically rolled (M) condition, is used in the construction of fixed offshore structures including oil rigs and service platforms.

With higher yield and tensile strength, the material has good weldability characteristics and can be supplied as heavy carbon steel plates or fabricated sections.

S460G2+Q/+M

We offers S460G2 – a structural grade steel for specific use in the offshore industry as supplied under specification EN10025:2001.

With a minimum yield strength of 460 N/mm², S460G2 is engineered specifically for use in the building of offshore structures such as service platforms and oil rigs. The material can be supplied as S460G2+Q (Quenched) or S460G2+M (thermo-mechanically rolled).

API 2H Grade 50

API 2H Grade 50 is an offshore steel grade which is regulated by the American Bureau of Shipbuilding (ABS).

Whilst originally designed as a structural steel for use in the welded construction of offshore platforms, the material is also used in other applications due to the tight controls placed on the chemical composition of the steel at the mill stage.

The primary use of API 2H Grade 50 is in critical areas of the construction where good impact and fatigue resistance is required. API 2H Grade 50 can be found in stiffened plate construction, tubular joints, and other intersections where parts of the plates are subjected to through-thickness tension.

The steel is also used as a piling material for bridge construction due to its fracture, vibration and torque resistance. API 2H Grade 50 is therefore not only in 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 impact resistance
• Resistance to lamellar tearing
• Though classed as a marine grade, can be used in a variety of applications due to stringent spec

API 2W Grade 50

Thermo-mechanically rolled for extra strength and toughness, API 2W Grade 50 is a structural offshore steel grade which is regulated by the American Bureau of Shipbuilding (ABS).

The material is used in the production of floating and rigid offshore oil and gas platforms and is used commonly in intersections of the structure due to the materials superior strength combined with good impact and fatigue resistance.

API 2W Grade 50 provides good toughness around the heat affected zone (HAZ) so is an ideal material for use in the welded joints of the construction.

The stringent chemical composition of the material makes API 2W Grade 50 an excellent structural steel where resistance to fracture, vibration or torque is required (as found in bridge construction).

The steel has arguably better welding characteristics than API 2H Grade 50 due to the materials lower carbon content.

Key Features:

• Structural offshore grade for critical applications
• Lower carbon content for improved weldability
• Thermo-mechanically rolled for extra strength and toughness
• Good impact resistance in heat affected zone (HAZ)
• Resistance to lamellar tearing

Shipbuilding Steels

Our hot rolled shipbuilding steel is produced in accordance with the relevant Classification Society, examples of which include Lloyds Register and Det Norske Veritas.

Our steel products include steel shipbuilding plate, fabricated steel sections and floor plate for decking. We can also supply bulb flats for plate stiffening, structural steel angles and inverted angles.

Our plates are supplied under the ASTM/ASME specification (ASTM A131 / ASME SA 131) which is the standard specification for Structural Steel for Ships.

We offer higher strength shipbuilding steels as standard .High strength steels offer significant cost advantages by reducing the weight of the structure in comparison to the steel used. The plates are suitable for use in the construction of container ships and large cargo freighters as well as commercial shipping lines such as luxury cruise ships and ferries.

Supply options include heavy plates, surface treated plates and pre-fabricated sections. In most cases, the steel can also be supplied as hot rolled coils or cut into lengths (sheets).

These high yield materials are commonly used in the construction of hulls and superstructures for large shipping vessels. The grades are exclusively for shipbuilding use as set out in the standard.

AH36

We supply grade AH36 high strength structural shipbuilding steel to the ASTM A131: Part 4 specification.

The material can be supplied as heavy plates, surface treated plates and fabricated sections.

The steel is used in the construction of container ships, bulk carriers and commercial ships such as liners and ferries.

Mechanical Properties of AH36

GRADE	RE	RM	ELONGATION
			A50mm	A200mm
	MPa	MPa	%	%
AH36	355	490/620	22	19

Chemical Composition of AH36

Element	%
C	0.18
Si	0.10/0.50
Mn	0.90/1.60
P	0.035
S	0.035
Cr	0.20
Mo	0.08
Ni	0.40
Cu	0.35
Cb	0.02/0.05
V	0.05/0.10

DH36

Sunny Steel supplies Grade DH36 to shipbuilders worldwide in accordance with the classification society of your choice and in accordance with ASTM A131:Part 4.

The material is available in heavy plates, surface treated plates and fabricated sections. The shipbuilding structural steel is used for the main structural build including the hull and superstructure. DH36 is suitable for new builds or refits and can be found in large bulk carriers, container ships and passenger liners.

Mechanical Properties of DH36

GRADE	RE	RM	ELONGATION
			A50mm	A200mm
	MPa	MPa	%	%
DH36	355	490/620	22	19

Chemical Composition of DH36

Element	%
C	0.18
Si	0.10/0.50
Mn	0.90/1.60
P	0.035
S	0.035
Cr	0.20
Mo	0.08
Ni	0.40
Cu	0.35
Cb	0.02/0.05
V	0.05/0.10

EH36

Grade EH36 – Sunny Steel are suppliers of high quality EH36 structural steel plate to the shipbuilding industry to specification ASTM A131: Part 4. We able to also offer compliance with classification society standards such as ones set by Lloyds Register.

The material is available as heavy plates or sheets and pre-fabricated steel sections. The steel can also be pre-treated. EH36 is widely used in the shipbuilding industry both in hull construction and in the superstructure itself.

Mechanical Properties of EH36

GRADE	RE	RM	ELONGATION
			A50mm	A200mm
	MPa	MPa	%	%
EH36	355	490/620	22	19

Chemical Composition of EH36

Element	%
C	0.18
Si	0.10/0.50
Mn	0.90/1.60
P	0.035
S	0.035
Cr	0.20
Mo	0.08
Ni	0.40
Cu	0.35
Cb	0.02/0.05
V	0.05/0.10