B637 Gr.N07725
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Standard specification for precipitation hardening and cold worked nickel alloy bars, forgings and forging stocks for moderate or high temperature service N07725 datasheet,B637 N07725 Chemical compositions, mechanical properties from Steelmaking,ESR melted, Blooming, Forging, Hot rolling, Heat treatment, 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 N07725
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 (％): ≤ 0.030
Si (％): ≤ 0.20
Mn (％): ≤ 0.35
P (％) ≤: 0.015
S (％) ≤: 0.010
Cr (％): 19.0 ~ 22.5
Co (%):
Mo (％): 7.00 ~ 9.50
Nb/Ta (％): 2.75 ~ 4.00
Ti (%): 1.00 ~ 1.70
Al (%): ≤ 0.35
B (%): -
Fe (%): remainder
Cu (%): -
Zr (%): -
V (%): -
V (%): -
Ni (%): 55.0 ~ 59.0
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Condition: Solution + Precipitation harden
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Condition: Solution + Precipitation harden
Heat treatment pratice: Solution treatment 1038+/-14 Deg. hold 1/2h min. and 4h max. cool at rate equivalent to air cool or faster.
Precipitation hardening treatment, 732+/-14 Deg, hold at temperatue for 5 ~ 8 1/2h, furnace cool to 621+/14 Deg. hold at temperatue for 5 ~ 8 1/2h, air cool or faster.
Tensile strength,σb/≥ MPa: 1034
Tensile strength,σb/≥ MPa: 1034
Yield strength, σ0.2/≥ MPa: 827
Elongation, δ ≥(％): 20.0
Reduction of area, ф ≥ (％): 35.0
Hardness | HBW: 43HRC max.
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): 2.00mm 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 ≥(％): 20.0
Reduction of area, ф ≥ (％): 35.0
Hardness | HBW: 43HRC max.
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): 2.00mm 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.
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