Material List

Product name

Pipe fittings, flanges, bars, plates, etc.

Standards

ASTM B463/ ASMESB463、ASTM A240/ ASMESA240、ASTM B729/ ASME SB72

International names

Alloy 20、UNS N08020、NS143、Inconelalloy20/NAS 335X、W.Nr.2.4460、Nicrofer 3620 Nb-alloy20、ATI 20

Main composition

Carbon (C) ≤ 0.07, manganese (Mn) ≤ 2.0, nickel (Ni) 32.0 ~ 38.0, silicon (Si) ≤ 1.0, phosphorus (P) ≤ 0.045, sulfur (S) ≤ 0.035, chromium (Cr) 19.0 ~ 21.0

Niobium (Nb) ≤ 1.0, aluminum (Al) ≤ 0.2, titanium (Ti) 0.6 ~ 1.2, copper (Cu) 3.0 ~ 4.0, molybdenum (Mo) 2.0 ~ 3.0

Physical properties

Density: 8.14g/cm3, Melting point: 1370-1400 ℃, Magnetic properties: None

Heat treatment

Heat preservation between 900-1150 ℃ for 1-2 hours, fast air cooling or water cooling.

Mechanical properties

Tensile strength: σb ≥ 550Mpa, yield strength σb ≥ 240Mpa: elongation: δ ≥ 30%, hardness; HB135-220 Corrosion resistance and main use environment:

Alloy 20 has many excellent properties of corrosion resistant alloys, good resistance to oxidizing and moderate reducing corrosion, excellent resistance to stress corrosion cracking and good resistance to local corrosion in many chemical process media have satisfactory corrosion resistance properties Excellent resistance to stress corrosion cracking and good resistance to local reductive composite media corrosion, used in sulfuric acid environment and industrial installations containing halogen ions and metal ions in sulfuric acid solution.

Welding materials and welding process

E(R)320LR

Application of Alloy 20

Sulfuric acid pickling equipment, phosphoric acid production equipment, petrochemical equipment, coal chemical industry, marine platforms, seawater desalination,, composite plates, bellows expansion joints and other industries and products.