ASTM B637 Gr.684
2016-10-25 13:17:19 Origin： Remark：0 Click：
Standard specification for precipitation hardening and cold worked nickel alloy bars,684 forgings and forging stocks for moderate or high temperature service ASTM B637 Gr.684 datasheet, ASTM B637 Gr.684 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 684
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 (％): ≤ 0.15
Si (％): ≤ 0.75
Mn (％): ≤ 0.75
P (％) ≤: 0.015
S (％) ≤: 0.015
Cr (％): 15.0 ~ 20.0
Co (%): 13.0 ~ 20.0
Mo (％): 3.00 ~ 5.00
Nb/Ta (％): -
Ti (%): 2.50 ~ 3.25
Al (%): 2.50 ~ 3.25
Zr (%): 0.02 ~ 0.12
B (%): 0.003 ~ 0.010
Fe (%): ≤ 4.00
Cu (%): ≤ 0.15
Ni (%): Remainder
Ta (%): -
Ni (%): Remainder
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 1080+/-14 Deg. hold 4h, air cool.
Stabilizing treatment 843+/-14 Deg. hold 24h, air cool.
Precipitation hardening treatment, 760+/-14 Deg, hold 16h, air cooled or furnace cool.
Tensile strength,σb/≥ MPa: 1120
Tensile strength,σb/≥ MPa: 1120
Yield strength, σ0.2/≥ MPa: 725
Elongation, δ ≥(％): 15.0
Reduction of area, ф ≥ (％): 15.0
Hardness | HBW: 310 min.
STRESS RUPTURE REQUIREMENT
Test temperature: 816 Deg.
Stress /MPa: 260
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 ≥(％): 15.0
Reduction of area, ф ≥ (％): 15.0
Hardness | HBW: 310 min.
STRESS RUPTURE REQUIREMENT
Test temperature: 816 Deg.
Stress /MPa: 260
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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