Engineers Australia - Perth 17th July 2012

Engineers Australia - Perth
      17th July 2012

                              1

Introduction

• A new revision to the AS/NZS 3678 Standard was
    released in 2011, replacing the previous 1996 version.

•   This standard covers production and supply of hot rolled
    structural steel plate and floorplate rolled on a reversing
    mill, along with the supply of slabs as analysis grades
    only.

                                                                  2

What are the main changes?

1. Increased options for specifying Engineers

2. Strengthening compliance to the standard

                                                3

Increasing options/guidance for specifying Engineers

A wider range of impact testing options than previously offered:
  • impact testing at lower temperatures (L20 or L40)
  • higher minimum impact energy specifications (Y20 & Y40
     designations)

                                                               4

Increasing options/guidance for specifying Engineers

• A wider range of minimum reduction in area requirements
  for through thickness testing (Z15, Z25 & Z35)

• “Fine-grained” steels for applications where heat treatment
  in the normalizing temperature range may be required.

• More explicit warning regarding the potential hazards of
  reheating grades in this standard above 620°C. Where the
  application and/or fabrication process requires heating
  above 620°C, the purchaser should discuss with the
  manufacturer.
                                                                5

Strengthening compliance to the standard

• Mandating a wider range of requirements on test
  certificates

• Strengthening product conformity testing requirements
(Appendix B of the standard)
• Requirement for testing to be conducted by ILAC
  accredited testing laboratory

• Requirement for grades with no impact test designation to
  at least meet the Charpy impact requirements of Table 10
  (in AS/NZS 3678) at 0°C if tested.
                                                              6

Other changes in standard

• Introduced ReH (Upper yield stress) and Rm (Tensile
  Stress) designations.

• Definition of manufacturing process

• Introduce the option for a 6mm diameter test piece for
  through thickness testing (“Z” testing) of plates ≤ 25mm
  thick

• Introduced seismic grade for the NZ market.

                                                             7

What do the additional options mean for you?

Improve ability of engineer to specify a suitable material.

 Lower temperature options (L20 & L40) and higher
  minimum absorbed energy (Y20 & Y40) for Charpy
  impact testing

  • design of structures with lower service temperatures

  • design of more critical structures requiring higher levels
     of toughness

  • Australian equivalents for overseas designs simplifying
     sourcing
                                                                 8

What do the additional options mean for you?

Improve the ability of engineer to specify a suitable material.
 Range of options for through thickness testing
  • ability to specify higher Through Thickness Tensile
      requirement (Z35) for more critical structures
  • option to specify wider thickness range with through
      thickness requirements with Z15 option.
  • allowing design engineers to specify requirements for
      applications such as high restraint in welded joints.
 Factor in the requirement for hot forming by specifying
  “fine-grained” steel
  • clarifies requirement for purchaser when fabrication
      requires the material to be hot formed.

                                                                  9

What do the changes to mean for you?

 Confidence for project owners and designing engineers
  that the material will have the required properties to meet
  the design code requirements.
 The new version of the standard requires all material to
  meet “L0” Charpy impact requirements as a minimum if
  tested
  • aligns material code with Structural design Code (AS
     4100)
  • previous version of AS/NZS 3678 standard did not
     have this requirement

                                                                10

What do the changes to conformance mean to you?

Confidence for project owners and purchasers that the
  material will comply to the standard means lower risk:
 Requirement for testing to take place using reputable
  testing laboratories
  • ILAC are an internationally recognised Third Party
     accreditation body for laboratories, such as NATA
  • ensures the tests are carried out using the correct
     procedures
  • incorrect procedures may affect the result and the
     material may not meet the required properties.

                                                           11

What does enhanced conformance mean to you?

Information and control to make informed purchasing
  decisions

 Certificates written in English ensure the end user can
  check the material supplied complies with the standard

 Requirement for the producing mill be listed on the test
  certificate allows you to assess the origin of the material.

 Allows the purchaser to ensure material is sourced from
  reputable Mills

                                                                 12

What are the risks of non-conformance?

                                         13

What do the changes to conformance mean to you?

Test certificates must state
 The position of sampling, orientation of test piece and
  frequency of sampling for mechanical testing
  • these attributes can affect the test results and
     determine whether the material complies with the
     required mechanical properties
  • Some overseas standards allow sampling from the
     edge of the plate. The edges tend to be higher in
     strength and not necessarily representative of the plate
     properties.

                                                                14

Why is strengthening conformance important to you?

Test certificates also have a requirement for ALL elements in
  the standard to be reported

  • ensures that products with high residual levels are not
     supplied - high residual levels may impact on
     toughness and weldability of material

  • allows the purchaser to assess attributes such as
     weldability and galvanizability

                                                                15

Suspect material?

                    16

Effect of Silicon content on Galvanizing

   Effect of
0.06/0.07% Si

Reactive Steel !

              (From the American Galvanizers Association)
                                                            17

What are the risks of non-conformance?

                                         18

What do the changes to conformance mean for you?

Reduced risk of non-conformance to the standard

 Appendix B now „Normative” rather than “Informative”

  • this change tightened the acceptable testing
      methodology to be used in demonstrating compliance

 Meet market demand for conforming material

  •   changes allow purchaser to meet end customer
      expectations and to demonstrate adequate risk
      controls for project.
                                                           19

How do I check conformance of my plate to the
standard?

1. Check the test certificate

                            Certificates to be written in English
                            Reference to a third party
                            accrediting body recognised by ILAC,
                            such as NATA
                            Steelmakers, manufacturers,
                            suppliers and testing authorities name
                            Test certificate number and test
                            number
                            Date

                                                               20

How do I check conformance of my plate to the
standard?

                        Product, testing specification
                        and grade, e.g. AS/NZS 3678-
                        350L15
                        Product delivery condition, eg
                        “As rolled”
                        Dimensions
                        Product Steelmaking process,
                        e.g. basic oxygen, slab cast
                        Unique product identifiers for
                        the tested units and other
                        product covered by the test
                        certificate
                        Heat number
                                                          21

How do I check conformance of my plate to the
standard?

                        Chemical Analysis type, e.g.
                        either ladle or cast analysis (‘L’)
                        or product (‘P’) analysis
                        Chemical composition of all
                        elements listed in Tables 2 or 3 of
                        the standard.
                        The relevant mechanical testing
                        results (including test piece
                        position and orientation, batch or
                        item basis of testing and results)
                        Additional tests agreed
                        between the purchaser and the
                        manufacturer
                                                              22

How do I check conformance of my plate to the
standard?

                        Statement acknowledging the
                        chemistry and tested mechanical
                        properties comply with the
                        standard

                        Signatory from the
                        manufacturer, supplier and
                        certification authority attesting
                        to items above.

                                                            23

How do I check conformance of my plate to the
standard?

2. Check the stencil on the plate has the following:
     Traceable plate or identification number
     Heat number
     Name of manufacturer or mark (or both)
     Grade
     Standard

                                                       24

Summary

If you are an engineer the changes to the AS/NZS 3678
    Standard mean you have enhanced tools to:

• Specify the right material for the right application

• Ensure compliance to the standard, which gives you
  confidence to manage risk and conduct due diligence,
  ultimately enhancing your reputation

                                                         25

For further details contact:
           John Dryden
          02 4275 4667
john.dryden@Bluescopesteel.com

                                   26