Products

Alloy 20

Wst. 2.4660

UNS N08020

Stock program: Available on request

Specification: ASTM B 729/ASME SB 729 / ASTM B 468/ASME SB 468 / NACE MR0175 / Seamless and welded condition

Maximum service temperature: 500°C / 930°F


Characteristics

  • Superior resistance to stress-corrosion cracking in boiling 20 to 40% sulfuric acid
  • Excellent general corrosion resistance to sulfuric acid
  • Good mechanical properties and fabric ability
  • Minimal carbide precipitations during welding
  • Very good resistance to chloride stress-corrosion cracking

Market applications:

  • Chemical processing industry
  • Pharmaceutical and food plants
  • Petrochemical process equipment
  • Acid cleaning and pickling equipment
  • Heat exchanges

Technical details

Technical composition (%) Fe Cr Ni Mo Mn Si P C S Nb Cn
20 min   Bal.   19.0   32.0   2.0   -   -   -   -   -   -   3.0
  max   -   21.0   38.0   3.0   2.00   1.00   0.045   0.070   0.035   8xC (1.0 max)   4.0
Mechanical properties 20
Tensile strenght (mpa, min)   551
Yield strength (0.2% offset mpa, min)   241
Elongation (%, min)   30
Density / weight (g / cm3 / kg)   8.1

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