Bisalloy Bisplate Technical Manual

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Bisalloy Technical Manual

BISPLATE Technical Manual

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Bisalloy Technical Manual ContentsChapters Introduction How to Contact us Process Route Range of Grades Available Sizes Manufacturing Tolerances Cutting BISPLATE Welding BISPLATE Bending, Rolling, Shearing and Punching BISPLATE Drilling, Countersinking & Tapping BISPLATE Turning & Milling BISPLATE Design Examples BISPLATE Identification Marking and Colour Coding Testing and Certification Hardness Testing BISPLATE BISPLATE Wear Comparisons Fatigue resistance of BISPLATE Performance of BISPLATE at Elevated Temperatures Galvanising BISPLATE Page Numbers 3 4 5 6 23 24 27 35 43 47 53 57 69 70 71 74 79 87 90

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Bisalloy Technical Manual IntroductionBisalloy Steels Pty Ltd, located at Unanderra close to BlueScope Steels integrated steel works at Port Kembla, is Australias only manufacturer of high strength, wear resistant and armour grade steel plate by the continuos roller quenching and tempering process. Quenching and tempering, defined as a combination of heating and cooling of a metal or alloy, changes the microstructure of the steel and improves the strength, hardness and toughness of the materials being treated. Utilising the most advanced heat treatment technology; furnace temperatures and quenching rates are scientifically controlled to obtain the optimum quality grades of steel with low alloy content. The resulting products of low alloy quenched and tempered steel offer designers the strength to weight advantages and wear resistant properties not available in conventional steels. High strength steel has a strength to weight ratio of more than three times that of mild steel. Principal applications lie in mining equipment, transport, telescopic cranes, materials handling equipment, high rise construction and forestry. High hardness grades offer improved wear life making it ideal for applications such as liners for chutes, buckets, dump trucks etc. BISPLATE Armour grades are suitable for armoured personnel carriers and ballistic protection of military and civilian fixed plant and transport equipment. BISPLATE grades can be readily cut, welded, formed and drilled using similar techniques to mild steel. Bisalloy Steels operates an approved mechanical testing laboratory registered and monitored by the National Association of Testing Authorities (NATA). The companys quality control and management system is assessed by Lloyds and accredited to ISO9001:2000. The capacity, quality and versatility of our heat treatment line enables us to compete in both domestic and international markets; including North and South America, Asia, New Zealand and Africa.Disclaimer

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Bisalloy Technical Manual How To Contact UsBisalloy Steels Pty Ltd 18 Resolution Drive Unanderra P.O.Box 1246 NSW 2526 Australia Tel Switch Fax Web Site 61 (0)2 4272 0444 61 (0)2 4272 0456

Tasmania, Victoria, Western Australia and South Australia Greg Check tel 02 4272 0417 Mob. 0418 833030 New South Wales, Queensland, Northern Territory & New Zealand Jim Devlin tel 02 4272 0419 Mob. 0418 427766 Export Sales Willy Pang tel 02 4272 0418 Mob 0419 280765

Sales & Marketing Manager Michael Sampson tel 02 4272 0412 Mob. 0418 603852 Bisalloy Manager Nick Hardcastle

tel 02 4272 0402 Mob. 0418 264370

Technical Manager Russell Barnett tel 02 4272 0470 Mob. 0418 271948

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Bisalloy Technical Manual

Schematic Diagram of BISPATE Production Process

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Bisalloy Technical ManualRANGE OF GRADES INTRODUCTION Bisalloy Steels grades are world class, our structural grades complying with many of the international quenched and tempered steel plate standards. Each of the grades covered by this brochure has specific mechanical and chemical properties detailed. The process information detailed below is applicable to all BISPLATE product manufactured by Bisalloy Steels. BISALLOYS FEED PLATE The technology used in the manufacture of BISPLATE is not only world class, but the demands of high strength and high hardness steels dictate the need for one of the most stringent process routes utilised in the manufacture of steel plate, anywhere in the world. Hot metal desulphurisation ensures low levels of sulphur and other impurities in steelmaking. Vacuum degassing is carried out to reduce the Hydrogen content of the steel whilst also decreasing the amount of undesirable Oxygen and Nitrogen in the steel. Control of impurities is additionally assisted through the use of hot metal injection and conditioning of the slag during the Basic Oxygen Steelmaking process. Close control of chemical composition and final microstructure is maintained through the use of ladle refining with Calcium injection, Argon bubbling through the heat during steelmaking and alloying additions made under vacuum. Following steelmaking, integrity of slab product is ensured by the use of electromagnetic stirring, continuous casting and controlled cooling of slabs prior to plate rolling. Finally, plate rolling is carried out in a computer controlled four high rolling mill in which each draft is modified during rolling for optimisation of final properties. The net result is steel with improved toughness, structural integrity and fatigue resistance, providing consistent product performance in service. BISALLOYS HEAT TREATMENT Plate is heated in our natural gas fired furnace prior to quenching in the Drever roller quench unit. Complete PLC control allows tight and consistent control of all furnace and quench operations including water flow rates and pressures, furnace temperatures and residency times. Pre and post heat treatment shot blasting removes scale and presents an attractive plate. This results in improvements in product properties, welding and cutting, as well as simplification during fabrication.

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Bisalloy Technical ManualThe final operation at Bisalloy is plate leveling through the plate leveler in material up to 32mm thickness. This has resulted in significant improvements in flatness of plate to market, much tighter than the Australian Standard and other international standards. Our quality assurance system ensures that full traceability exists from initial steelmaking right through the process to the final plate. Each plate is individually hard stamped with a unique identification, and this links the overall traceability. All plates are tested for hardness, whilst all structural grades are tested in Bisalloys NATA approved mechanical testing laboratory. Plates of all grades are certified. The entire process is carried out in compliance with ISO-9001 certified by LRQA (Lloyds Register Quality Assurance). BISALLOYS TECHNICAL DEVELOPMENT Each of the grades outlined in this brochure has been developed to optimise chemistry and mechanical properties in conjunction with Bisalloys heat treatment process. Our world class steel grades ensure that properties such as ductility, weldability and toughness are maximised whilst complying with the required hardness and strength requirements. Ongoing R&D at Bisalloy keeps our product range at the leading edge of available quenched and tempered steels. Already we are developing steels to meet the emerging requirements for still stronger structural and higher hardnesses grades, and these will be released to the market as demand dictates.

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Bisalloy Technical ManualBISPLATE 6 0 BISPLATE 60 is a low carbon, low alloy, high strength structural steel which exhibits excellent cold formability and low temperature fracture toughness. APPLICATIONS The combination of BISPLATE 60 mechanical properties and ease of fabrication offers economical advantages in many structural applications. Some examples of applications for this grade include: Storage tanks (Water/Oil/Gas) High rise buildings (Columns/Transfer beams) Lifting equipment (Mobile/Overhead cranes) FABRICATION BISPLATE 60 can be welded successfully with minimal levels of preheat and has excellent low temperature fracture toughness. BISPLATE 60 has been designed such that a low hardness level is produced in the heat affected zone (HAZ). As a result this steel has a low susceptibility to HAZ cracking. For further details on fabrication please refer to Bisalloys technical literature. MECHANICAL PROPERTIESPROPERTIES 0.2% Proof Stress Tensile Strength Elongation in 50mm G.L. Charpy Impact (Longitudinal) 20C (10mm X 10mm) Hardness SPECIFICATION 500 MPa (Min) 590 730 MPa 20% (Min) 80J (Min) TYPICAL 580 MPa 640 MPa 30% 200J 210HB

CHEMICAL COMPOSITIONTHICKNESS (mm) 5-80-100 Typical Typical Typical C 0.16 0.18 0.16 P 0.010 0.010 0.010 Mn 1.10 1.40 1.15 Si 0.20 0.20 0.20 S 0.003 0.003 0.003 0.20 0.90 Cr Mo 0.20 0.20 0.20 B 0.0010 0.0010 0.0010 CE(IIW) 0.40 0.50 0.58 PCM 0.25 0.29 0.30

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Bisalloy Technical ManualBISPLATE 70 BISPLATE 70 is a low carbon, low alloy, high strength structural steel. This grade can be welded with minimal preheat and has excellent low temperature fracture toughness suitable for structural applications. APPLICATIONS The combination of BISPLATE 70 mechanical properties and ease of fabrication offers economical advantages in many structural applications. Some examples of applications for this grade include: Transport equipment (Trays/Low loaders/Outriggers) Storage tanks (Water/Oil/Gas) High rise buildings (Columns/Transfer beams) Lifting equipm