HASTELLOY® G-35® alloy Site
Principal Features
Chemical Composition
Physical Properties
Corrosion Data
Iso-Corrosion Diagrams
Mechanical Properties
Welding and Fabrication
Machining
Specifications
HASTELLOY® G-35 alloy
Technical Briefs
HASTELLOY® G-35 alloy
Wire Information
Metallurgist Support
Sales Office Addresses
Tubular Products
Fittings & Flanges
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Machining |
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The following are guidelines for performing typical machining operations upon G-35 alloy wrought stock. Exact details for specific machining jobs will vary with circumstances of the particular job. Other tool materials not listed here may be suitable for machining G-35 alloy under various conditions. For further information, please consult Haynes publication H-2010.
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Recommended Tool Types and Machining Conditions |
Operations |
Carbide Tools |
High Speed Steel Tools |
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| Drilling |
C-2 grade not recommended, but tipped
drills may be successful on rigid
setup of no great depth. The web
must be thinned to reduce thrust.
Use 135° included angle on point.
Gun drill can be used.
Speed: 50 sfm.
Oil2 or water-base3 coolant.
Coolant-feed carbide tipped
drills may be economical in
some setups. |
M-33, M-40 series1 or T-15: Use short
drills, heavy web, 135° crank-shaft,
grind points wherever possible.
Speed: 10-15 sfm.
Feed: 0.001 in. rev. 1/8 in. dia.
0.002 in. rev. 1/4 in. dia.
0.003 in. rev. 1/2 in. dia.
0.005 in. rev. 3/4 in. dia.
0.007 in. rev. 1 in. dia.
Oil or water-base coolant.
Use coolant feed drills if possible. |
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| Normal Roughing; Turning or Facing |
C-2 or C-3 grade: Negative rake square
insert, 45° SCEA4, 1/32 in. nose
radius.
Tool holder: 5° neg. back rake, 5° neg.
side rake.
Speed: 90 sfm depending on rigidity of
set up, 0.010 in. feed, 0.150 in.
depth of cut.
Dry5, oil, or water-base coolant. |
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Finishing;
Turning or Facing |
C-2 or C-3 grade: Positive rake square
insert, if possible, 45° SCEA,
1/32 in. nose radius.
Tool holder: 5° pos. back rake, 5° pos.
side rake.
Speed: 95-110 sfm, 0.005-0.007 in.
feed, 0.040 in. depth of cut.
Dry or water-base coolant. |
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NOTES: |
- M-40 series High Speed Steels include M-41, M-42, M-43, M-44, M-45 and M-46 at the time of writing. Others may be added and should be equally suitable.
- Oil coolant should be a premium quality, sulfochlorinated oil with extreme pressure additives. A viscosity at 100°F from 50 to 125 SSU.
- Water-base coolant should be premium quality, sulfochlorinated water soluble oil or chemical emulsion with extreme pressure additives. Dilute with water to make
15:1 mix. Water-base coolant may cause chipping and rapid failure of carbide tools in interrupted cuts.
- SCEA - Side cutting edge angle or lead angle of the tool.
- At any point where dry cutting is recommended, an air jet directed on the tool may provide substantial tool life increase. A water-base coolant mist may also be effective.
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