B637 Gr.N07208
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Standard specification for precipitation hardening and cold worked nickel alloy bars,B637 N07208 forgings and forging stocks for moderate or high temperature service ASTM B637 Grade N07208 datasheet, N07208 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 N07208
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 (％): 0.04 ~ 0.08
Si (％): ≤ 0.15
Mn (％): ≤ 0.30
P (％) ≤: 0.015
S (％) ≤: 0.015
Cr (％): 18.5 ~ 20.5
Co (%): 9.00 ~ 11.0
Mo (％): 8.00 ~ 9.00
Nb/Ta (％): -
Ti (%): 1.90 ~ 2.30
Al (%): 1.38 ~ 1.65
Zr (%): ≤ 0.020
B (%): 0.003 ~ 0.010
Fe (%): ≤ 1.50
Cu (%): ≤ 0.10
Ni (%): Remainder
Ta (%): ≤ 0.10
Ni (%): Remainder
Ta (%): ≤ 0.10
Nb (%): ≤ 0.20
W (%): ≤ 0.50
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Condition: Solution + cold worked, solution treatment 1093 ~ 1163 Deg. hold 1/2h, 5 ~ 10 minutes min. rapid air cool or water quench
W (%): ≤ 0.50
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Condition: Solution + cold worked, solution treatment 1093 ~ 1163 Deg. hold 1/2h, 5 ~ 10 minutes min. rapid air cool or water quench
Precipitation hardening treatment, 1010+/-14 Deg, hold 2h, air cooled, followed by 788+/-14 Deg, hold 8h, air cooled.
Tensile strength,σb/≥ MPa: 1034
Tensile strength,σb/≥ MPa: 1034
Yield strength, σ0.2/≥ MPa: 620
Elongation, δ ≥(％): 20.0
Reduction of area, ф ≥ (％): 14.0
Hardness | HBW: 250 min.
STRESS RUPTURE REQUIREMENT
Test temperature: 927 Deg.
Stress /MPa: 69
Time to rupture: 50h
Elongtation, (%): 10
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 ≥ (％): 14.0
Hardness | HBW: 250 min.
STRESS RUPTURE REQUIREMENT
Test temperature: 927 Deg.
Stress /MPa: 69
Time to rupture: 50h
Elongtation, (%): 10
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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