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Alloy Refractaloy 26/ R26 Turbine Bolt used in steam turbine and generating machinery

Alloy R26 bolt, Stud bolt, double bolt, Hexagon bolt

♦  Thread Size: M10-M120 

♦  Length: according to clients drawing or specifaction

♦  Application for : Steam turbine generating equipment

♦  Grade: A Class

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Refractaloy 26 is Fe - NI - Co - Cr precipitation hardening type deformation of high temperature alloy, long-term use of C - 570 ℃ temperature range of 540 ℃, the highest temperature can reach 677 C, add element of a Cr, mo alloy solid solution strengthening, high to low titanium, aluminum form y aging strengthening phase, while drilling elements made of titanium, aluminum solubility in the solid solution is reduced, prompted y phase precipitation amount increase, so as to improve the thermal stability of y, reduce y 'phase of the stacking fault energy.

The composite properties of the alloy are superior, with excellent tensile resistance, force relaxation and creep resistance, no notch sensitivity.

Refractaloy 26 Chemical Composition
Alloy

%

Ni

Cr

Fe

Mo

P

Co

C

Mn

Si

S

B

Al

Ti

Refractaloy 26

Min.

35.0

16.0

bal

2.5

- 18.0 - - - - 0.001 - 2.5

Max.

39.0 20.0 3.5 0.03 22.0 0.08 1.0 1.5 0.03 0.01 0.25 3.0
Refractaloy 26 Physical Properties
Density 8.2 g/cm³
Melting point 1200 ℃
Refractaloy 26 Mechanical Properties
Status Tensile strength 
Rm N/mm²
Yield strength 
Rp 0. 2N/mm²
Elongation 
As %
Brinell hardness HB
Solution +Aging 1000 550 20 331-262    (26-35.5)