ASTM B637 GR.688
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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 ASTM B637 GR.688 datasheet, Chemical compositions, ASTM B637 GR.688 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 688
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 (％): ≤ 0.50
Mn (％): ≤ 1.00
P (％) ≤: 0.015
S (％) ≤: 0.015
Cr (％): 14.0 ~ 17.0
Co (%): ≤ 1.00
Mo (％): -
Nb/Ta (％): 0.70 ~ 1.20
Ti (%): 2.25 ~ 2.75
Al (%): 0.40 ~ 1.00
Zr (%): -
B (%): -
Fe (%): 5.00 ~ 9.00
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 (％): ≤ 0.50
Mn (％): ≤ 1.00
P (％) ≤: 0.015
S (％) ≤: 0.015
Cr (％): 14.0 ~ 17.0
Co (%): ≤ 1.00
Mo (％): -
Nb/Ta (％): 0.70 ~ 1.20
Ti (%): 2.25 ~ 2.75
Al (%): 0.40 ~ 1.00
Zr (%): -
B (%): -
Fe (%): 5.00 ~ 9.00
Cu (%): ≤ 0.50
Ni (%): 70.0 min.
Ta (%): -
Ni (%): 70.0 min.
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 1419+/-14 Deg. hold 2 ~ 4h, air cool.
Stabilizing treatment 843+/-14 Deg. hold 24h, air cool.
Precipitation hardening treatment, 700+/-14 Deg, hold 20h, air cooled or furnace cool.
Tensile strength,σb/≥ MPa: 965
Tensile strength,σb/≥ MPa: 965
Yield strength, σ0.2/≥ MPa: 620
Elongation, δ ≥(％): 8.0
Reduction of area, ф ≥ (％): -
Hardness | HBW: 262 min.
STRESS RUPTURE REQUIREMENT
Test temperature: 732 Deg.
Stress /MPa: 310
Time to rupture: 100h
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): 2.00mm 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 ≥(％): 8.0
Reduction of area, ф ≥ (％): -
Hardness | HBW: 262 min.
STRESS RUPTURE REQUIREMENT
Test temperature: 732 Deg.
Stress /MPa: 310
Time to rupture: 100h
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): 2.00mm 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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