Australian Stainless Blog

The Family of Duplex Stainless Steels

The Family of Duplex Stainless Steels

The use of duplex stainless steels has grown globally based on their strength, corrosion resistance and a range of properties that improve equipment life.

The name duplex is sometimes used to describe Alloy 2205 (UNS S31803 or UNS S32205), however duplex is a family of alloys ranging from lean duplex and standard duplex to super duplex stainless steel.

HISTORY

Duplex stainless steel was first developed in France and Sweden in the 1930’s, with the early grades becoming a forerunner for AISI 329, but a lack of control over the chemistry and lack of adequate welding products and techniques impeded development

Stainless Steel Shines in Perth's Elizabeth Quay

Stainless Steel Shines in Perth's Elizabeth Quay

The successful collaboration of ASSDA members and their expertise in the extensive use of stainless steel has been integral to bringing Perth’s iconic and most complex bridge to life.

The Elizabeth Quay Pedestrian Bridge was constructed by DASSH, a joint venture between Decmil, Structural Systems and Hawkins Civil, and is a key feature of the Elizabeth Quay mixed-use development project core to revitalising Perth’s CBD.

Designed and engineered by Arup, the cable-stayed suspension bridge features a leaning double arch, is 22m high, 5m wide and is suspended over the inlet of the Swan River with a clearance of 5.2m from

Running Water

Running Water

Water authorities tackle water shortages with stainless steel.

Water is a fundamental human need. It is central to our lives, from what we drink, to what we use in washing ourselves, our clothes and a multitude of other uses. Safe, clean and palatable water comes at a price though, and when leaks occur in distribution systems, additional costs are incurred as even more water must be found and treated. Security of water supply is a prerequisite for sustainable growth and dealing with leakage is a universal challenge. To combat the scourge of leaks, a number of water distribution authorities across

Stainless Steel Design Innovation

Stainless Steel Design Innovation

Brisbane’s iconic Story Bridge is sporting increased safety measures with the application of innovative stainless steel products and laser-fusion technology.

 The 76-year old heritage-listed cantilever bridge now incorporates three-metre tall, stainless steel safety barriers on its pedestrian walkways, as a result of an outstanding collaboration between multiple project stakeholders. Completed in December 2015, the $8.4 million project was led by design and construct head contractor, Freyssinet.

The design brief was to develop an anti-climb structure that was both functional and aesthetically appealing, whilst ensuring the heritage values of the bridge were maintained.

This presented a number of engineering challenges, including

A Walk to Remember

A Walk to Remember

The spirit of the Anzacs is evoked in a new architecturally stunning, stainless steel walkway that unfolds around Newcastle’s cliffs and links Strzelecki Lookout to Bar Beach.

 The much-anticipated Newcastle Memorial Walk opened on 24 April 2015 on the eve of the Anzac centenary, and features spectacular 360-degree views of Newcastle city and coastline.

The 450m raised walkway forms part of Newcastle City Council’s ‘Bathers Way Project’, a $29 million foreshore development and revitalisation program to link Merewether Beach with Nobby Beach via a coastal walk. The total cost of the walkway was $4.5 million, $3 million of which was

Riverwalk Reborn

Riverwalk Reborn

Brisbane's New Farm Riverwalk is one of the city's beloved icons. Originally constructed in 2003, the Riverwalk was used daily by over 3000 cyclists, pedestrians and runners before it was washed away during the 2011 floods.

After a construction period of nearly 18 months, Brisbane City Council’s re-imagined New Farm Riverwalk has now opened to the public, connecting New Farm to the Brisbane City via the Howard Smith Wharf Precinct.

Engineered by Arup, the Riverwalk has a design life of 100 years and sits 3.4m above mean sea level on robust piles.

Critical to its design and life expectancy is

Local stainless companies get a piece of the mining action

Local stainless companies get a piece of the mining action

ASSDA member Australian Pickling & Passivation Service (APAPS) and ASSDA sponsor Sandvik Mining & Construction have been central to the expansion of a coal export port in North Queensland.

With Queensland coal exports forecast to increase to 250mtpa by 2015, the strength and durability of the state’s expanding coal transport infrastructure and rail systems is critical to ensuring export capacity.

This recent expansion required the manufacture of 300 three-piece conveyor frames using 40 tonnes of 316 grade stainless steel, specified to foil the port’s exposure to wind, rain, salt spray and abrasive dust.

Sandvik Mining & Construction manufactured the conveyor

Proven Strength in Stainless

Proven Strength in Stainless

Stainless steel is the material of choice to specify for severe weather conditions.

The overhead netting of Perth Zoo's Australian Wetlands and Penguin Plunge Exhibit was badly damaged when a severe hailstorm and winds of up to 128km/h swept through Perth in March 2010.

During the storm, a tree collapsed onto the netting which was made from a nylon material.

The original concept for this major renovation project was to use stainless steel overhead netting and painted or galvanised steel for the cabling and the majority of other supporting infrastructure components.

However, when ASSDA members Structural Dynamics was awarded subcontractor

Stainless Steel and Nickel - 100 Years of Working Together

Stainless Steel and Nickel - 100 Years of Working Together

This is an abridged version of a story that first appeared under the same title in Stainless Steel Focus No. 07/2012.

The Nickel Institute's director of promotion, Peter Cutler, and consultant Gary Coates, reveal some of the reasons for the continuing popularity of nickel in stainless steels.

Stainless steel is everywhere in our world and contributes to all aspects of our lives. We find stainless steel in our homes, in our buildings and offices, in the vehicles we travel in and in every imaginable industrial sector. Yet the first patents for stainless steel were issued only 100 years ago.

How

Stainless Bridges the Gap

Stainless Bridges the Gap

The Go-Between Bridge

With 14,000 vehicles crossing Brisbane's Go-Between Bridge every day, stainless reinforcement is playing a vital structural role on Brisbane's first inner city bridge in over 40 years.

Formerly known as the Hale Street Link, the Go-Between Bridge connects Merivale and Montague Streets in West End to Coronation Drive and the Inner City Bypass in Milton.

Constructed as part of the Brisbane City Council’s TransApex plan, the Go-Between Bridge was designed to improve cross-river accessibility, reduce inner city traffic congestion, increase accessibility to Brisbane’s recreational and cultural precincts and cater for future residential developments in West End and

A Stainless Facelift for Surfers Paradise

A Stainless Facelift for Surfers Paradise

Stainless is a key feature in the urban design and revamp of one of the Gold Coast's most iconic and vibrant tourist destinations.

The $25 million Surfers Foreshore Project was commissioned by the Gold Coast City Council (GCCC) to redevelop the beachfront area between Laycock Street and View Avenue in Surfers Paradise.

Aimed at improving infrastructure and visitor recreation, the new promenade features new lifeguard towers, amenity blocks, beach shelters, picnic areas with barbeques, and increased pedestrian and disability access to the beach.

Managing Contractor Abigroup Contractors Pty Ltd appointed ASSDA member and Accredited Fabricator J&T Mechanical Installation to

Chimpanzee Sanctuary

Chimpanzee Sanctuary

Where Strength Meets Style

Innovation in zoo enclosure design is a key feature of the recently completed $7.5 million makeover of the Chimpanzee Sanctuary at Sydney’s Taronga Zoo.

The project brief was to create a chimpanzee habitat akin to their native home that would encourage social interaction and allow the zoo’s primate keepers to manage animal husbandry and the group’s changing demographic. The enclosure’s transparency and the ability to withstand the chimpanzee’s remarkable strength and intelligence were essential.

ASSDA member Ronstan Tensile Architecture was contracted by the builder, the Lipman Group, to be the specialist contractor for the technical design

Stainless Strengthens Walls

Stainless Strengthens Walls

The devastation of the 1989 Newcastle earthquake resulted in a revision of standards specifying building materials and products to be used in differing environments. 

One of the products that came under close scrutiny was wall ties (also known as brick ties).

Assessment of the damage after the earthquake found that many walls had 'peeled away' from building structures due to deteriorated wall ties.

A wall tie connects masonry to the structural backing which supports the wall. The most common wall ties are manufactured out of galvanised steel.

Australian Standard AS 3700 - 1998 revised the conditions under which wall ties

Stainless Make Over for Brisbane Landmark

Stainless Make Over for Brisbane Landmark

New (and extended) life has been injected into a Brisbane landmark courtesy of a stainless make over worth about $1.2 million. 

In an application believed to be the first of its kind in Queensland, engineers have used grade 316 stainless steel to replace the bearings on Brisbane's Victoria Bridge.

The transition from original carbon steel to stainless has increased the service life of the bearings to at least 50 years from 30 years, giving the Brisbane City Council at least 20 years before the enormous labour and logistical costs of servicing bearings is required.

he bridge, opened in 1969, spans

Let the Games Begin!

Let the Games Begin!

When millions around the world watch the Sydney Olympic Games this September, they will also be experiencing the best of Australian architecture, with particular emphasis on stainless steel.

Stadium Australia, located at Homebush Bay in Sydney's inner city in the centrepiece of the Olympic site. Here, events such as the opening and closing ceremonies and the track and field program will be played out. Closer examination of the sit reveals the use of stainless steel in a myriad of applications, both aesthetic and functional. Perhaps more importantly, the use of stainless steel helps meet the organiser's "green" commitment: to use

Stainless Export Defies Elements

Stainless Export Defies Elements

Sixty tonnes of stainless steel has been exported to Hong Kong as part of an innovative Australian-designed and manufactured kit form, large span skylight project worth three quarters of a million dollars. 

The 42 gable trussed skylights and sub-frames in varying sizes up to four metres wide and eight metres long were installed in a $90 million dollar treatment plant commissioned by the Hong Kong Government.

Grade 316 stainless steel was used for the skylight's precision pre-cut sub-frame members, welded maintenance ladders, lntalok mechanism assemblies, special profiles, on sight assembly jigs, pivots and fixings.

The project specified that the skylights

Stainless Strength for Bridge Projects

Stainless Strength for Bridge Projects

The Tasmanian Government has embarked on a series of bridge renewal projects, using stainless steel reinforced pre-cast concrete to replace old timber structures.

The Barnes Creek bridge is the first of three to be rebuilt on Brunie Island, south of Hobart. It utilised 7.5 tonnes of grade 316 and duplex 2205 stainless reinforcing bar in a size range of 12 to 25mm supplied by ASSDA member Arminox Australia Pty Ltd.

The Tasmanian Department of Infrastructure, Energy and Resources specified stainless steel for the reinforcing to save on ongoing maintenance costs. The location of the bridge presents construction and maintenance challenges,

Walking on Water

Walking on Water

Pedestrians using Brisbane’s scenic RiverWalk when it opens next March will be strolling across 150 tonnes of stainless steel reinforcing, embedded in 287 concrete pontoons linked to form an 875 metre long walkway from the CBD along the river to New Farm Park.

Although the 5.4 metre wide walkway will feel like a single solid structure, it is actually made up of a series of 13.5 tonne concrete blocks, half of their bulk floating below the water level.

Stainless steel balustrades will preserve open views across to Southbank and back to the CBD while ensuring public safety. These combine subtly

Stainless Braves the Elements

Stainless Braves the Elements

Advanced engineering solutions are required to handle conditions found on offshore drilling and processing platforms. The saltwater environment is highly corrosive, the flare presents extremes of temperature and the force of winds and currents is constant. The most durable and reliable materials need to be employed, which is why stainless steel plays and important part.

An impressive project making use of stainless' strength and corrosion-resistance is the Bayu Undan Gas Project in the Timor Sea, 5OOkm north of Darwin (pictured). Here, stainless steel is used to line the 18" pipelines between the processing platform and the wellhead platform 8km distant

Stainless Enclosures Built to Last

Stainless Enclosures Built to Last

Australian-made weighing technology is the first choice for global giant Caterpillar Inc., the world's leading manufacturer of construction and mining equipment.

Local firm Transcale, designers and manufacturers of electronic weighing equipment specifically for the mining and transport industries, exports its equipment worldwide to over 11 countries in North and South America, Southern Africa and South East Asia.

Transcale's focus on the mining sector means that cutting edge technology needs to be protected from some of the harshest environments in the world. Extremes of heat and clod, record rainfalls, drought, high salt or other corrosive minerals are just a few of

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