718 Alloy Welded Pipe ASTM B516 INCONEL ALLOY 718 TUBE INCONEL 718 PIPE/TUBE

Material

Nickel alloy

Standard

ASTM B983

Grade

INCONEL 718

Brade

PYE

Size

O.D 6-219mm; W.T:1-30mm

Chemical composition

Ni: 50~55% ; Cr:17~21% ; Fe: balance;Mo:2.8~3.3% ; Nb: 4.75~5.5% ; Co: ≤1.0% ; C≤0.08% ; Mn≤0.35% ; Si≤ 0.35% ; Cu≤0.3% ; Al:
0.2~0.8% ; Ti: 0.65~1.15% ; P≤0.015% ;

Density

8.24 g/cm3

Melting range

1260~1340℃

Characteristic as below

1.workability
2.High tensile strength,endurance strength,creep strength and rupture strength at 700℃.
3.High inoxidability at1000℃.
4.Steady mechanical performance in the low temperature.
5.Good welding performance.

Metallurgical structure

718 alloy is Austenitic structure, precipitation hardening generate "γ" made it excellent mechanical performance. G rain boundary
generate "δ" made it the best plasticity in the heat treatment.

Corrosion resistance

718 alloy with extremely resistance to stress corrosion cracking and pitting ability in high temperature or low temperature
environments, especially the inoxidability in the high temperature.

Application field

The elevated temperature strength, excellent corrosion resistance and workability at 700℃ properties made it use in a wide range
of high requirement environments.
1.Steam turbine
2.Liquid-fuel rocket
3.Cryogenic engineering
4.Acid environment
5.Nuclear engineering