B637 Grade N07718
2016-11-02 09:42:59 Origin： Remark：0 Click：
B637 Gr.N07718 Suppliers, N07718 Chemical, N07718 properties Steelmaking, Hot blooming, hot forging, Hot rolling, Heat treated, Straightening, Ultrasonic test, Cold working or Machined. All of these materials conform to Military standard, nuclear power. Technical specification ASTM B637-2011
TECHNICAL SPECIFICATION - ASTM B637 GRADE UNS N07718
TECHNICAL SPECIFICATION - ASTM B637 - 2011
OFFICIAL TEST CERTIFICATE - issued by TUV - SGS - BV
MATERIAL CATEGORY - Precipitation hardening and cold worked nickel alloy
CHEMICAL COMPOSITION (WEIGHT %)
C (％): ≤ 0.08
Si (％): ≤ 0.35
Mn (％): ≤ 0.35
P (％) ≤: 0.015
S (％) ≤: 0.015
Cr (％): 17.0 ~ 21.0
Co (%): ≤ 1.00
Mo (％): 2.80 ~ 3.30
Nb/Ta (％): 4.75 ~ 5.50
Ti (%): 0.65 ~ 1.15
Al (%): 0.20 ~ 0.80
Zr (%): -
B (%): ≤ 0.006
Fe (%): Remainder
Cu (%): ≤ 0.30
Ni (%): 50.0 ~ 55.0
Ta (%): -
Ni (%): 50.0 ~ 55.0
Ta (%): -
Nb (%): -
W (%): -
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Condition: Solution + Stabilize + Precipitation harden
W (%): -
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Condition: Solution + Stabilize + Precipitation harden
Heat treatment pratice: Solution treatment 924 ~ 1010 Deg. hold 1/2h min., cool at rate equivalent to air cool or faster
Precipitation hardening treatment, 718+/-14 Deg, hold at temperature for 8h, furnace cool to 621+/-14 Deg., hold until total precipitation heat treatment time has reached 18h, air cool
Tensile strength,σb/≥ MPa: 1275
Tensile strength,σb/≥ MPa: 1275
Yield strength, σ0.2/≥ MPa: 1034
Elongation, δ ≥(％): 12.0
Reduction of area, ф ≥ (％): 15.0
Hardness | HBW: 331 min.
STRESS RUPTURE REQUIREMENT
Test temperature: 649 Deg.
Stress /MPa: 690
Time to rupture: 23h
Elongtation, (%): 5.0
TYPICAL APPLICATIONS
Starndard specification for high-temperature bolting, with expansion coefficients comparable to austenitic stainless steel with yield strength ranging from 345 to 827 MPa for use in high-temperature service such as fasteners for pressure vessel and valve flanges.
Nuclear reactor
Turbine engine parts - mechanical gears, gear shaft, main axis, blade
Mechanical parts - bolt and nut, fastener
Gas turbine blade
Fuel nozzle
These materials must stand up to high heat, extreme oxidation potential and recycling.
FORMS AND SHAPES
Round bar (Diameter): 2.0mm to 500mm
Square bar / Flat bar: 3mm to 500mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
Elongation, δ ≥(％): 12.0
Reduction of area, ф ≥ (％): 15.0
Hardness | HBW: 331 min.
STRESS RUPTURE REQUIREMENT
Test temperature: 649 Deg.
Stress /MPa: 690
Time to rupture: 23h
Elongtation, (%): 5.0
TYPICAL APPLICATIONS
Starndard specification for high-temperature bolting, with expansion coefficients comparable to austenitic stainless steel with yield strength ranging from 345 to 827 MPa for use in high-temperature service such as fasteners for pressure vessel and valve flanges.
Nuclear reactor
Turbine engine parts - mechanical gears, gear shaft, main axis, blade
Mechanical parts - bolt and nut, fastener
Gas turbine blade
Fuel nozzle
These materials must stand up to high heat, extreme oxidation potential and recycling.
FORMS AND SHAPES
Round bar (Diameter): 2.0mm to 500mm
Square bar / Flat bar: 3mm to 500mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry. pleased to EMAIL (sales@ccsteels.com) our resident team of qualified production engineers.
If you meet further on any technical enquiry. pleased to EMAIL (sales@ccsteels.com) our resident team of qualified production engineers.
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