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Manufacture Hastelloy C276 Nickel Alloy Bar for Heat Exchanger
Introduction
• The various corrosion data of the harness-c-276 alloy are typical, but cannot be used as a specification,
especially in unknown environments, materials must be tested before they can be selected.There is not
enough Cr in the harrington c-276 alloy to resist corrosion in strongly oxidized environments, such as hot
concentrated nitric acid.This kind of alloy is mainly produced in the chemical process environment,
especially in the case of mixed acid, such as the flue gas desulfurization system discharge pipe.
• Hartz alloy mechanical properties is very outstanding, it has the characteristics of high strength, high
toughness, so has certain difficulty in machining, and the strain hardening tendency is extremely strong,
when the deformation rate of 15%, about twice the 18 8 stainless steel.There is also a moderate
temperature sensitive zone in haversian alloy, and its susceptibility tends to increase with the increase
of the deformation rate.When the temperature is high, the mechanical properties and corrosion resistance
of the alloy are decreased because of the easy absorption of harmful elements.
2.Chemical composition
| C | S | Mn | P | S | Ni | Cr | Mo | Fe | Co | W | V | |
| Min | 14.5 | 15.0 | 4.0 | 3.0 | ||||||||
| Max | 0.01 | 0.08 | 1.0 | 0.04 | 0.03 | Margin | 16.5 | 17.0 | 7.0 | 2.5 | 4.5 | 0.35 |
3.Physical property
| Density(g/cm3) | 8.9 |
| Specific heat(J/kg·k) | 436 |
| Specific resistance(μΩ·cm) | 130.0 |
| pyroconductivity(W/m·k) | 10.8 |
| thermal diffusivity(m²/S) | 2.8 X 1.-6 |
| Average thermal expansion coefficient(10-6/℃) | 12.2-13.6 |
| longitudinal modulus of elasticity(Mpa) | 21.1 X 104 |
| modulus of rigidity (Mpa) | 80.8 X 104 |
| ferromagnetism | No |
| melting point | 1325-1369 |
4.Character
The key factors influencing corrosion resistance of this material are the control of impurity S,P, gas
content O,N and key elements C,Si, etc.It depends on the control of production process, such as the
choice of heating temperature and heat preservation time of forging, such as the guarantee of forging
ratio, such as the guarantee of solid solution treatment, etc.
