Copper Alloy grades at a glance with ASTM specification and equivalent chart microstructure. 

Duplex steel optimally combines the strength derived from the ferritic phase and the corrosion resistance properties inherent in the austenitic phases. The various grades result from the introduction of alloying materials in different proportions. These duplex steel grades are assigned numerical identifiers for easy recognition, with the numbers reflecting the percentage composition of the major elements. There are three primary groups of duplex stainless steel: duplex, super duplex, and lean duplex, each encompassing different grades. Duplex steel, comprising chromium, molybdenum, and nickel, can be either hot rolled or cold drawn depending on the specific grades and intended applications. The grading of duplex stainless steel also denotes its pitting corrosion resistance, as indicated by the PREN number. Essentially, the PREN number serves as an identification of the chromium, molybdenum, and nickel percentages in the composition. The lean duplex exhibits the lowest PREN, offering less pitting corrosion resistance but remarkable strength, making it suitable for the construction industry. Conversely, the super duplex boasts the highest PREN numbers, providing exceptional pitting corrosion resistance and finding applications in the chemical industries. The standard duplex falls within a moderate range of PREN numbers, offering intermediate pitting corrosion resistance. Due to its cost-effectiveness and well-balanced properties, it is the most widely utilised duplex. Upon contact, we can furnish you with a duplex steel price list. The purchase amount and wholesale prices may vary based on the duplex steel application size, required forms, types, and shapes. As a prominent duplex steel supplier in India, we cater to a diverse range of duplex steel grades and specifications. The term “duplex” aptly describes the material, embodying dual characteristics derived from its austenitic and ferritic phases in metallurgy.

Types of Copper & Copper Alloys

  • Brass
  • Bronze alloys
  • Gunmetals
  • Copper Nickel
  • Nickel silver alloys
  • Beryllium-copper

Copper Alloy ASTM Standard

  • ASTM B16/ ASME SB16
  • ASTM B21/ ASME SB21
  • ASTM B42 / ASME SB42

Copper Alloy Specification

Oxygen Free Copper Alloys (OFHC & OFE)
 OFHC Copper materialETP Copper ( IS 1897)
Oxygen(.001%) less than 10 ppm of oxygen(.015-.04% oxygen) 150 – 400 ppm oxygen.
Electrical / thermal conductivity100% Minimum IACS Conductivitymay vary on processing semis.Min 99.99% IACS Conductivity
Bending testPasses close bending testnot applicable
Thermal cycle behaviorIts BetterPoor behavior
Brazed & welded jointConsistencyMay lead to inconsistent
Suitable in high vacuum devicesIt is SuitableUnsuitable

Copper Alloy Applications & Uses

  • Roofing / Cladding and Rainwater system
  • To increase temperature
  • Water pipes and piping connections
  • Chemical, Oil and gas pipeline system
  • Electrical cabling works

Copper Alloy Composition

BS / ENAvailable formsEQUIVALENTS BS (OLD)
1057Seamles tubing round2871 Pt1
12449Seamles tubing round2871 Pt2
12450Seamless capillary tubing 
12451Seamles tubing round2871 Pt3
12452Rolled and seamless finned tubing
12735Seamles tubing round Part 1 / 2
13348Seamles tubing round
13349Pre-insulated tube
13600Seamless copper tubing1977

Copper Alloy Properties

  • Melting Point: Pure Copper is 1083ºC.


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