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1.HASTELLOY G-30 Overview:
HASTELLOY Alloy G-30 (UNS N06030) Ni 46, Cr 30.0 Fe 15.0, Mo 5.5, W
2.5
Super alloys or high performance alloys are used in environments
with very high temperature above 540ºC (1000ºF) where deformation
resistance and high surface stability are chiefly required. They
have good oxidation and creep resistance. Cobalt-base, nickel-base
and iron-base alloys are the three major types of super alloys. The
iron-base super alloys are generally wrought alloys provided with
stainless steel technology. Nickel-base and cobalt-base super
alloys may be cast or wrought based on its composition or
application. Super alloys can be generally forged, rolled to sheet
or produced in different shapes. Highly alloyed compositions are
formed as castings. They can be strengthened using hardening
techniques like work hardening, solid-solution hardening and
precipitation hardening.
HASTELLOY(r) G30(r) alloy is corrosion resistant and has the
ability to oxidize acids.
Elementary composition :
Element | Content (%) |
Nickel, Ni | 43 |
Chromium, Cr | 28.0-31.5 |
Iron, Fe | 13-17 |
Cobalt, Co | 5 |
Molybdenum, Mo | 4-6 |
Tungsten, W | 1.50 - 4 |
Manganese, Mn | 1.50 |
Copper, Cu | 1 - 2 .40 |
Silicon, Si | 0.8 |
Phosphorous, P | 0.040 |
Carbon, C | 0.030 |
Sulfur, S | 0.020 |
Physical Properties:
Properties | Metric | Imperial |
Tensile strength | 1096 MPa | 159000 psi |
Yield strength (@0.2%) | 1000 MPa | 145000 psi |
Modulus of elasticity (plate heat treated to 1177°C, rapid quenched) | 202 GPa | 29300 ksi |
Elongation at break (in 50.8 mm) | 12% | 12% |
Reduction of area | 57% | 57% |
Hardness, Brinell (converted from Rockwell C hardness) | 304 | 304 |
Hardness, Knoop (converted from Rockwell C hardness) | 326 | 326 |
Hardness, Rockwell C | 32 | 32 |
Hardness, Vickers (converted from Rockwell C hardness) | 316 | 316 |
Physical Properties:
Properties | Metric | Imperial |
Density | 8.22 g/cm³ | 0.297 lb/in³ |
Melting point | 1371ºC | 2500ºF |
Applications
The following are the major applications of HASTELLOY(r) G30(r)
alloy:
Chemical process equipment
Reheater tubes
Pump components
Agitator blades
Reboilers in nuclear waste reprocessing.
2.Regular packaging for Nickel Alloy G-30 ASTM B622 UNS N06030 Hastelloy G30 seamless
pipe:
Woven:
Wooden:
3.Process for Nickel Alloy G-30 ASTM B622 UNS N06030 Hastelloy G30
seamless pipe:
Nickel & cobalt base corrosion, temperature and wear-resistant
alloys are classified as moderate to difficult when machining,
however, it should be emphasized that these alloys can be machined
using conventional production methods at satisfactory rates. During
machining these alloys work harden rapidly, generate high heat
during cutting, weld to the cutting tool surface and offer high
resistance to metal removal because of their high shear strengths.
The following are key points which should be considered during
machining operations:
CAPACITY - Machine should be rigid and overpowered as much as
possible.
RIGIDITY - Work piece and tool should be held rigid. Minimize tool
overhang.
TOOL SHARPNESS - Make sure tools are sharp at all times. Change to
sharpened tools at regular intervals rather than out of necessity.
A 0.015 inch wear land is considered a dull tool.
TOOLS - Use positive rake angle tools for most machining
operations. Negative rake angle tools can be considered for
intermittent cuts and heavy stock removal. Carbide-tipped tools are
suggested for most applications. High speed tools can be used, with
lower production rates, and are often recommended for intermittent
cuts.
POSITIVE CUTS - Use heavy, constant, feeds to maintain positive
cutting action. If feed slows and the tool dwells in the cut, work
hardening occurs, tool life deteriorates and close tolerances are
impossible.
LUBRICATION - lubricants are desirable, soluble oils are
recommended especially when using carbide tooling. Detailed
machining parameters are presented Tables 16 and17. General plasma
cutting recommendations are presented in Table 18.