ASTM A815 ASTM A312 TP UNS 32750 Welded pipe seamless pipe steel tube
Super Duplex S32750 Seamless Pipes:
Material Specfication and Dimension Standards:
||Material Specification as per ASME/ASTM
|Seamless Pipes | Welded Pipes
||ASME SB167/167M TPS32750, ASTM B167/167M TPS32750, ASME SA928/928M TPS32750, ASTM A928/928M TPS32750 Class 1, Cl. 2, Cl. 3, Cl. 4, Cl. 5
||ANSI B36.10, ANSI B36.19
|1/4" to 16"
||Sch 5, Sch 5s, Sch 10, Sch 10s, Sch 20, Sch 30, Sch 40s, Sch 40, Sch STD, Sch 60, Sch 80s, Sch 100, Sch 120, Sch XS, Sch XXS, Sch 160
The difference between S32750 and S32760:
||Super Duplex Industry Specifications
||ASTM A182 F53, A240, A276, A479, A789, A790, A815, A928, A988
|C 0.030 max
Cu 0.5 max
Mn 1.20 max
P 0.035 max
S 0.020 max
Si 0.8 max
||ASTM A182 F55, A240, A276, A314, A473, A479, A789, A790, A815, A928, A988
|C 0.03 max
Mn 1.0 max
P 0.03 max
S 0.01 max
Si 1.0 max
Duplex 2507 Overview
Duplex 2507 is a super duplex stainless steel designed for applications which demand exceptional strength and corrosion resistance. Alloy 2507 has 25% chromium, 4% molybdenum, and 7% nickel. This high molybdenum, chromium and nitrogen content results in excellent resistance to chloride pitting and crevice corrosion attack and the duplex structure provides 2507 with exceptional resistance to chloride stress corrosion cracking.
Usage of Duplex 2507 should be limited to applications below 600° F (316° C). Extended elevated temperature exposure can reduce both the toughness and corrosion resistance of alloy 2507.
Duplex 2507 possesses excellent mechanical properties. Often a light gauge of 2507 material can be used to achieve the same design strength of a thicker nickel alloy. The resulting savings in weight can dramatically reduce the overall cost of fabrication.
2507 Duplex is highly resistant to uniform corrosion by organic acids such as formic and acetic acid. It is alsohighly resistant to inorganic acids, especially if they contain chlorides. Alloy 2507 is highly resistant to carbide-related intergranular corrosion. Due to the ferritic portion of the duplex structure of the alloy it is very resistant to stress corrosion cracking in warm chloride containing environments. Through additions of chromium, molybdenum and nitrogen localized corrosion such as pitting and crevice attack are improved. Alloy 2507 has excellent localized pitting resistance.
What are the characteristics of Duplex 2507?
- High resistance to chloride stress corrosion cracking
- High Strength
- Superior resistance to chloride pitting and crevice corrosion
- Good general corrosion resistance
- Suggested for applications up to 600° F
- Low rate of thermal expansion
- Combination of properties given by austenitic and ferritic structure
- Good weldability and workability