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Friday 28 February 2020
  • Alloy B-2 Data Sheet
  • Alloy B-2 Data Sheet
  • Alloy B-2 Data Sheet
  • Alloy B-2 Data Sheet
  • Alloy B-2 Data Sheet
  • Alloy B-2 Data Sheet
  • Alloy B-2 Data Sheet
  • Alloy B-2 Data Sheet

 

Alloy

UNS Number

Alloy B-2

UNS N10665

 

GENERAL PROPERTIES

Alloy B2 is a nickel-molybdenum alloy with significant resistance to reducing environments, such as hydrogen chloride gas and sulphuric, acetic and phosphoric acids. Alloy B2 provides resistance to pure sulphuric acid and a number of non-oxidizing acids. The alloy should not be used in oxidizing media or where oxidizing contaminants are available in reducing media. Premature failure may occur if alloy B2 is used where iron or copper is present in a system containing hydrochloric acid.

Industry users like the resistance to a wide range of organic acids and the resistance to chloride-induced stress-corrosion cracking.

Alloy B2 resists the formation of grain boundary carbide precipitates in the weld heat-affected zone, making it suitable for most chemical process applications in the as-welded condition. The heat-affected weld zones have reduced precipitation of carbides and other phases to ensure uniform corrosion resistance.

 

RESISTANCE TO CORROSION

Alloy B2 also has excellent resistance to pitting and stress corrosion cracking.

 

The high molybdenum content in Alloy B2 gives the alloy excellent resistance to hydrochloric acid over a wide range of concentrations and temperatures.

PHYSICAL PROPERTIES

Melting Point

(°C)

Density

Modulus of Elasticity
in Tension

1427

  9.22g/cm3

217 GPa

 

MECHANICAL PROPERTIES

Alloy

Tensile Strength
Minimum
(psi)

Yield Strength
Minimum 0.2% offset

(psi)

% Elongation
in 2" Minimum

       

B-2

133,000

57,400

55

 

CHEMICAL PROPERTIES 

Alloy

C

Mn

Cr

Fe

Si

Mo

Co

P

S

Ni

B-22

0.02

1.0

1.0

2.0

0.1

26.0-30.0

1.0

0.04

0.03

Bal

 

WELDING

Alloy B2 resists the formation of grain boundary carbide precipitates in the weld heat-affected zone, making it suitable for most chemical process applications in the as-welded condition. The heat-affected weld zones have reduced precipitation of carbides and other phases to ensure uniform corrosion resistance.

 

HEAT TREATMENT

Alloy B2 can be solution treated at 1065°C (1950°F) and then rapidly quenched in normal conditions that require product forms to be furnished and used. In cases where bright annealed product forms such as sheet and strip are required, Alloy B2 can be solution treated at 1149°C (2100°F) and then cooled in a hydrogen atmosphere so as to avoid oxidation of the bright surface.

Contact Us

 

contact phoneT: + 44 (0)1902 409316
Fusion House
The Crescent
Willenhall
West Midlands
WV13 2QR

F: + 44 (0)1902 409304
E: sales@quest4alloys.com