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  5. Structural Steel

    Structural Steel

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    Description
    Specification
    Standard

    Structural Steel

    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.

    Part of Masteel’s strength is the ability to be able to provide a total solution for your business, offering added value services including computerised multihead profiling. 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

    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. Masteel UK Limited can supply the steel from stock or directly from the mill to customer destinations on a global footing. Please refer to the technical information for S355G7.

    Mechanical Properties of S355G7

    GRADE MECHANICAL PROPERTIES (MIN) UNLESS SATED TENSILE STRENGTH RM MPA
    Tensile Strength Nominal Thickness (mm)
    Thickness (mm) Elongation A
    < 100 >100 <16 >16 <25 >25 <40 >40 <63 >63 <100 >100 <150 %
    S355G7+M 470/630 – 355 355 345 335 325 – 22
    S355G7+N 470/630 460/620 355 355 345 335 325 320 22

    Chemical Composition of S355G7

    %
    C 0.14
    Si 0.15/0.55
    Mn 1.00/1.65
    P 0.02
    S 0.01
    Cr 0.25
    Mo 0.08
    Ni 0.5
    Al 0.015/0.055
    Cu 0.3
    N 0.01


    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.

    Masteel UK Limited supplies Grade AH36 to the world’s master shipbuilders in accordance with the classification society of your choice. 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

    %
    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

    Masteel UK Limited 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

    %
    C 0.18
    Si 0.10/0.50
    Mn 0.90/1.60
    P 0.035

    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).

    Masteel UK Ltd 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.

    Masteel UK Limited can supply S355 from stock to customers on a worldwide basis.

    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 Masteel UK Limited.

    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.

    Masteel UK Limited supplies a wide range of S275 grade steels under the EN 10025 specification including S275JR and S275AR. We also supply a wide range of steel fabricated sections – including beams and columns – click here for more information.

    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

    Masteel UK Limited supplies S235 structural steel plate under the EN 10025 specification.

    Civil engineer

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