Atlas Specialty Metals
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Durinox Stainless Steel Rebar

In March 2006, Atlas Specialty Metals  entered into an agreement with Arminox Australia and the parent company, Midtjydsk Murbinderfabrik A/S of Denmark, to acquire their stainless steel reinforcing bar forming equipment and bar stock located at the Arminox site in Queensland. As a results of the agreement, Atlas become the exclusive marketer of Arminox stainless steel reinforcing bar products to the construction industry for Australia, New Zealand. We also cooperate with them in the development of new markets in South East Asia.
The awareness and use of stainless steel in reinforced concrete structures has grown throughout the world primarily as a result of the deterioration of capital works in harsh and corrosive environments which has focused engineering attention to seeking solutions to this problem. It is now well recognised that in these environments and with the "intelligent use" of stainless steel reinforcing bar a competitive solution to extending the longevity of life in concrete reinforced assets is available to design engineers and asset owners. 
 
Market Profile
  • Market is reinforced concrete infrastructure in highly corrosive environments such as seawater.
  • Typical applications are bridges, tunnels, wharfs, footpaths, embankments, drains.
  • Typical asset owners are Road authorities, City and local councils, Port authorities, Privatised asset builders, Government owned facilities (eg Military bases etc.)
  • Typical decision makers are Civil and structural engineers, Architects, Infrastructure advisors to Government, Asset owners and financiers.
Advantages of Stainless Steel
1. Highly resistant to corrosion
2. Minimal or no maintenance
3. Excellent mechanical properties
4. Easy to work
5. Weldable
6. Easy to handle
7. Recyclable
8. Certified – documented - controlled
9. Improved ”Life-Cycle Cost” – economical 
Reasons for specifying stainless steel reinforcing bar
  • Corrosion of carbon steel reinforcing in aggressive environments such as sea water is the most serious deterioration problem in concrete structures.
  • The durability of stainless steel is attractive to asset owners who often look at the “triple bottom line” (environment, social and financial) when assessing the overall cost of a structure.
  • Concrete cover can be reduced using stainless steel reinforcement which provides construction cost savings.
  • The enhanced performance of stainless steel can reduce the maintenance and repair costs of a comparable “carbon steel” reinforced structure.
  • Stainless steel reinforcing can be used in the critical “corrosion” zones of a “carbon steel” reinforced structure and extend the asset life and without fear of galvanic corrosion if designed correctly.
  • Stainless steel repairs to a carbon steel reinforced concrete structure will retard the “corrosion motor” and extend the asset life.
  • Stainless steel is a cost effective option in a structure that is difficult to access for repair or maintenance.
  • Austenitic stainless steels are generally non magnetic and suited to applications such as housing of electronic equipment, transformer bases, medical buildings where MRI scanners are used and runway calibration pads for aircraft instrumentation.
  • Austenitic stainless steel retains ductility to temperatures below -196 deg C making it suitable for reinforcement of containment systems for LNG and Liquid Oxygen.

Salient points

  • Concrete is a “sponge”
  • Asset longevity in critical infrastructure is important
  • Stainless steel and carbon steel can be combined without risk of galvanic corrosionStainless steel will stop corrosion motor in remedial situations.
Typical corrosion damage - stainless will prevent these problems:
  • Corrosion
  • Spalling
  • Micro/Macro cracks
Typical Cause
  • Chloride ingress
  • Carbonation
  • Alkali/silicon-reactions
  • Poor workmanship
  • Poor design
  • Poor concrete quality