INCONEL® X750 ALLOY DESCRIPTION
Alloy X750, with the addition of titanium and aluminum, is a nickel-chromium precipitation-hardenable alloy having high creep-rupture strength at high temperatures to about 130.0°F (700°C). It also has excellent properties down to cryogenic temperatures. Excellent corrosion and oxidation resistance and high strength at temperatures up to 1300°F.
Nickel Alloy 718 and Inconel® 718 Standards
Rod, Bar, Wire and Forging Stock
ASTM B 637
ASME SB 637
SAE AMS 5662
SAE AMS 5663
SAE AMS 5664
SAE AMS 5832
SAE AMS 5914
SAE AMS 5962
ASME Code Case 1993
ASME Code Case 2206
ASME Code Case 2222
AECMA PrEN 2404
AECMA PrEN 2405
AECMA PrEN 2952
AECMA PrEN 2961
AECMA PrEN 3219
AECMA PrEN 3666
ISO 9723
ISO 9724
ISO 9725
DIN 17752-17754Plate, Sheet and Strip
ASTM B 670
ASTM B 906
ASME SB 670
ASME SB 906
SAE AMS 5596
SAE AMS 5597
SAE AMS 5950
AECMA PrEN 2407
AECMA PrEN 2408
ISO 6208
DIN 1775Pipe & Tube
SAE AMS 5589
SAE AMS 5590
ASME Code Case N-253
DIN 17751
APPLICATIONS
Seal and other rings for gas turbines
Springs
Nuclear Springs
Fasteners
CHEMISTRY TYPICAL
Nickel + Cobalt: 70.00 min
Chromium: 14.0-17.0
Iron: 5.0-9.0
Titanium: 2.25-2.75
Aluminum: 0.40-1.00
Columbium + Tantalum: 0.70-1.20
Manganese: 1.00 max.
Silicon: 0.50 max.
Sulfur: 0.01 max.
Copper: 0.50 max.
Carbon: 0.08 max.
Cobalt: 1.00 max
PHYSICAL PROPERTIES
Density: 0.299 lbs/in³, 8.28 g/cm³
Mean Coefficient of Thermal Expansion: in/in/°F (mm/m/°C):
70-212°F (20-100°C) 7.0 x 10 (12.0)
Modulus of Elasticity: KSI (MPa)
31.0 x 10³(213.7 x 10³) in tension
11.0 X 10³ (75.8 x 10³) in torsion
Melting Range: 2540-2600°F (1393-1427°C)
MECHANICAL PROPERTIES AT ROOM TEMPERATURE
PROPERTIES: ANNEALED TYPICAL
Ultimate Tensile Strength
135 KSI max (930 MPa): gauges < 0.040 inches
145 KSI max (10000 MPa): gauges 0.040- 0.060 inches
150KSI max (1034 MPa): gauges > 0.060 inches
Elongation: 20% min
PROPERTIES: TEMPERED
Alloy X750 can be cold rolled to achieve the temper properties required by specific customers and/or manufacturing requirements.
HEAT TREATMENT
Alloy X750 can be heat treated.
ADDITIONAL PROPERTIES
CORROSION RESISTANCE
Refer to NACE (National Association of Corrosion Engineers)for recommendations.
STANDARD WIRE FINISHES
Extra Clean: Extra clean is also referred to as “bright annealed” or “bright annealed and cold rolled”
Grease (round wire only): Drawn in a heavy grease produces an “Ultra bright” finish for decorative applications
Soap (round wire only): Soap is used as a lubricant in the drawing process and is not removed. It acts as a lubricant during customer part forming operation.
A soap finish is available in tempered products.
Plated: Many plating options are available.
FORMS
Continuous Coils
Cut to lengths
Precision cutting
HEAT TREATMENT
Alloy X750 can be hardened by:
Cold Working
Age Hardening
Cold Working followed by Age Hardening
WELDING
For best results refer to: SSINA’s “Welding of Stainless Steels and Other Joining Methods”
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