Description
Jiangsu Liangyi is professional manufacturer of AISI 4340,SAE 4340,UNS G43400 open die forging parts and seamless rolled steel forged rings from china
Following is the shape of AISI 4340,SAE 4340,UNS G43400 forging steel material that we could do is:AISI 4340 Forged Steel round bars square bars Flat bars Rectangles Bars Rods,AISI 4340 Forged forging steel rings seamless rolled rings,SAE 4340 Forged Forging Steel Hubs housing shell Sleeves Bushes Bushing Cases Hollow Bars,AISI 4340 forging forged steel shafts,gear,pinion shafts,spindles,gear wheel,SAE 4340 Forged Forging Steel Discs Disks Blocks plates,AISI 4340 Forged Forging Steel Pipe Tubes Tubings Piping Shells Casings Case barrels Housings.
Following is forging products of AISI 4340,SAE 4340,UNS G43400 material that is used in following industry
AISI 4340 Forged Forging Sugar Mill Gear shafts,pinion shafts,roller shafts,flanges coupling
AISI 4340 Cement Mill Rotary Kiln Forged Forging Steel case hardened ground Pinion Shafts
SAE 4340 Forging Forging Steel mill gear pinion shafts
AISI 4340 Forging wind turbine gearbox gear shafts,ring gears
SAE 4340 forging forged locomotive transmission shafts
AISI 4340 forging forged crane wheels
AISI 4340 hydro turbine shafts
AISI 4340 Forging gearbox,gear reducer gear wheels, pinion shafts,ring gears,
AISI 4340 Forging crankshafts for gas compressor, mechanical presses,pump.
AISI 4340 forging steel Spindles
UNS G43400 Forging steel gear couplings
AISI 4340 Forged Forging Rolled Steel Granulators driers coaters coolers Riding Gear Rings
AISI 4340 Forged Forging Steel Cement Plant Pull Torque Rods
AISI 4340 Forged Forging Steel Crusher Shaft eccentric shafts,Mining Mine rock Gyratory crusher Eccentric shafts Spindles,Crusher Belt Pulley Wheels.
AISI 4340 Forged Forging Steel Mining Excavator Slewing Bearing Ball Races rings
AISI 4340 Forged Forging Steel Oil Drilling Tools Gear Shaft Pinion Shafts
AISI 4340 Forged Forging Steel helical gearing ground ship gearwheel Gear Wheels
AISI 4340 Forged Forging Steel Dragline Drag Line Power Shovel Cam Swing Shafts Shafting Spindles,dragline CENTRE PINTLE
AISI 4340 Forged Forging Steel Atomizer Shafts For Flue Gas Desulfurization scrubber Systems
AISI 4340 Forged Forging Steel drilling rigs Mud pump herringbone gear shafts pinion shafts
AISI 4340 Forging Forged Steel Thread Tie Rods
AISI 4340 Forged Forging Steel Electric Shovel Shaft Couplings
AISI 4340 Forged Forging Steel Granulator Gear Shafts
AISI 4340 Conveyor Pulley Forging Forged Steel Shafts factory
AISI 4340 Forged Forging Steel Hydraulic Honed Cylinders
UNS G43400 Forged Forging Steel Mine hoist systems Equipment Shaft Shafting Spindles
AISI 4340 Forged Forging Steel Rotary Dryer Trunnion Wheels
AISI 4340 Forged Forging Forge Steel Cold Mill Decoiler Coiler Mandrel Drum Shafts
AISI 4340 Forged Forging Steel bullgear Spider Gear Rims
UNS G43400 Forged Forging Shovel SWING Rimmed GEARING Gear DRUM GEAR,SWING PROPEL Pinion SHAFTS
AISI 4340 Forged Forging Steel Truck RING GEARS PLANET GEARS PINION SHAFTS
AISI 4340 Forging Forge Steel Offshore subsea anchor winches Stub Shafts Spindles
UNS G43400 Forged Forging Steel Seamless Hot rolled Truck concrete mixers semi-trailer bearings Rings
AISI 4340 Forged Forging Steel Subsea oil gas drilling equipments Box Riser Joint
AISI 4340 Forged Forging Railway locomotive Traction Motors end housings Rear End Shields
AISI 4340 Forged Forging Steel Gas Steam Turbine Labyrinth seal bushing
AISI 4340 Forged Forging Steel Gas Steam turbine generator air gap annular split baffle rings
AISI 4340 Forged Forging Steels Christmas Trees wellhead Spool Body Bodies
AISI 4340 Forged Forging forge Steel Gas Steam turbine Power generator Shafts
AISI 4340 Forged Forging Gas Steam turbine Rotors Forward Stub Shafts Spindles
AISI 4340 Forged Forging drilling tools,risers,connectors,flexible joint ,seals,flanges gasket factory
AISI 4340 Forged Forging drilling tools,risers,connectors,flexible joint ,seals,flanges gasket
AISI 4340 Forged Forging Steel gate valves Body Bodies bespoke flat bars
AISI 4340 Forged Forging Steel double studded adapter flange
AISI 4340 Forged Forging Steel Casing Heads,Tubing Heads,Casing Hangers,Tubing Hangers,Tubing Spools,Casing Spools,Spacer Spools
AISI 4340 Forging/Forged Fracturing Mud Pump Fluid End ModuleForged/Forging Blowout Preventer RAM Annular Bop Body Bodies
AISI 4340 Forged Forging Steel Pumping Equipment Eccentric Laterals Lateral Forgings
SNCM439 Forging Forged Steel shield TBM cutter Cutting Rings
AISI 4340 Forging/Forged Steel Wellhead Christmas Tree Frac Head (Fracturing Head)
AISI 4340 Forged Forging Steel drill head casings,collars,landing bowls
AISI 4340 Forged Forging Forge Steel FLANGED BOSSES
AISI 4340 Forged Forging Subsea Extrusions Oil Gas Inventory
AISI 4340 Forged Forging Steel Annulus AWB/PWB wing blocks Body Bodies
AISI 4340 Forged Forging Forge Steel Offshore subsea anchor winches Stub Shafts Spindles
AISI 4340 Forged Forging Steel Lower Torque Hydro Master gate Frac valve Lower Master Valve Block Body Bodies
AISI 4340 Forged Forging Oil field downhole drilling tool Mud Motor Drive shafts
AISI 4340 Forged Forging Valve Balls,valve Bonnets,valve Body Bodies ,valve Stems,valve closures, valve seat rings, valve core, valve discs,for H type two way 2‐way one way back pressure valves, ball valve,check valve,gate valve
AISI 4340 Forged Forging Steel Rotary Rock Drilling Tri-Cone Tricone Drill Bit cutter (PDC) Body Bodies factory
Forged Forging Steel Rotary Rock Drilling Tri-Cone Tricone Drill Bit cutter (PDC) Body Bodies
AISI 4340 is an ultra-high strength steel classified a medium-carbon, low-alloy steel. 4340 steel has high strength, ductility, toughness, creep resistance, and fatigue resistance relative to most other steels. Hardness ranging from 24 to 53 HRC can be achieved, depending on the heat treatment.
MELTING PRACTICE of SAE 4340 forged parts
Steel to this Specification shall be fully killed and made by the CVM process. Electric furnace vacuum degassed and electroslag-refined (ESR), or vacuum arc remelted (VAR), are acceptable alternates.
Fine grain melt practice shall be used to produce an austenite grain size of 5 or finer, as determined by ASTM E112, latest edition.
The melting and refining practice shall ensure an Quality finished wrought product in compliance with standard AMS 2301, latest edition.
Ladle chemistry (calcium treating) is permissible to accomplish inclusion shape control.
Chemical Composition of AISI 4340 forged shafts
C 0.38-0.43
Mn 0.60-0.80
P 0.035 max
S 0.040 max
Si 0.15-0.35
Ni 1.65-2.00
Cr 0.70-0.90
Mo 0.20-0.30
Analysis of each heat of SAE 4340 forged parts shall be made by the manufacturer.
An analysis may be made by the purchaser from a forging representing each heat. The chemical composition thus determined shall not vary from the requirements specified in clients technical manual by more than the limits permitted by ASTM A668.
The steel manufacturer may propose a modification in composition if, in his opinion, it is required to obtain the specified properties or if it will improve the product. Any contemplated change in composition shall be requested at the time of quotation and is subject to written approval of clients
FOllowing is heat treatment way of AISI 4340 forged parts
FORGING PRACTICE of AISI 4340 forged shafts
The forging manufacturer shall perform, prior to forging, all material tests, analyses,NDE and inspections necessary to ensure that the raw material will produce an internally sound forging meeting ultrasonic test specifications as designated on the forging drawing, the cleanliness requirements of Aircraft Quality standard AMS 2301, and response to heat treatment to produce the specified properties at the locations designated.
Ingots shall be cogged into elongated billets and receive sufficient mechanical work to accomplish grain refinement, improved homogeneity and enhanced density throughout the section.
The billet shall be sectioned into individual blocks or multiples which shall be forged in the three principal axes so as to minimize directionality (anisotropy) of the mechanical properties and meet the requirements . The longitudinal axis of the cogged ingot shall be retained as the longitudinal axis of each block. The blocks shall be upset,forged horizontally to draw-out, then re-upset and forged to the final configuration, e.g., a pancake forging or elongated forging which may be sectioned and further upset into apancake forging. The upset forging reduction employed (approximately 40%) shall be
selected by the manufacturer in consideration of the original ingot size, geometry and prior working, to produce isotropic properties in the finished product.
After forging and prior to subsequent heat treatment, the AISI 4340 forgings shall be subjected to a cooling rate that will accomplish transformation and prevent surface cracking, flaking or other defects which may be detrimental to the intended use of the finished product.
Preliminary heat treatment may be given to improve subsequent processing.
The production of 4340 forged parts by cutting from a longitudinally forged billet or bar is not acceptable and parts produced in this manner shall be rejected.
A prolongation of a production SAE 4340 forging may be used for mechanical property testing with the following requirements:
The length of the prolongation i.e., thickness of the pancake forging, will be increased a minimum of one half the finished part length or thickness.
b. The tensile specimen(s) shall be taken immediately adjacent to the internal surface generated by sectioning for prolongation removal, following the quench and temper treatment.
Following is heat treatmetn way of SAE 4340 forged parts
Forge 850-1050oC, slow furnace cool.
Normalize 850-880, air cool.
Anneal 650-700, Cool slowly in controlled furnace
Stress relieve
In the quenched and tempered condition, about 30-50oC
below the tempering temperature. Air cool.
In the annealed condition, 600-650oC. Air cool.
Harden 830-860oC, oil quench
Temper 540-680oC hold for 1 hour min. at temperature, air cool.
Nitride Suitable for both liquid and gas nitriding.
Mechanical Properties of the Raw Material of AISI 4340 forging gear shafts
T section 250 Tensile strength Mpa 850/1000 Yield(0.2%] MpA 635 Elongation 13 Charpy J 35 Hardness HB 248-302
U section 100 Tensile strength Mpa 925/1075 Yield(0.2%] MpA 740 Elongation 12 Charpy J 42 Hardness HB 269-331
V section 63 Tensile strength Mpa 1000/1150 Yield(0.2%] MpA 835 Elongation 12 Charpy J 42 Hardness HB 293-352
W section 29 Tensile strength Mpa 1075/1225 Yield(0.2%] MpA 925 Elongation 11 Charpy J 35 Hardness HB 311-375
X section 29 Tensile strength Mpa 1150/1300 Yield(0.2%] MpA 1005 Elongation 10 Charpy J 28 Hardness HB 341-401
Y section 29 Tensile strength Mpa 1225/1375 Yield(0.2%] MpA 1080 Elongation 10 Charpy J 21 Hardness HB 363-429
Z section 29 Tensile strength Mpa 155 0Min Yield(0.2%] MpA 1125 Elongation 8 Charpy J 9 Hardness HB 444 Min
Mechanical properties of AISI 4340 forged bars shall be determined on specimens machined from a pancake forging or prolongation thereof, which has been forged and heat treated with the balance of the forgings it represents.
The specimens shall be taken at mid-radius of the forging cross-section in a tangential orientation, and centrally located between the parallel faces of the pancake forging. Prolongation tensile and/or Charpy specimens shall be similarly oriented and adjacent to the section-face per technical manual
Mechanical property tests are to be conducted in accordance with ASTM A370, latest edition.
Standard ASTM 1/2 inch (13 mm) diameter tensile test specimens shall be used when the dimensions of the test material permit; in other instances, a sub-size specimen as defined in ASTM A370 may be used.
MICROSTRUCTURE REQUIREMENT of AISI 4340 forged bars
The microstructure at the test bar location is expected to exhibit a minimum of 50 percent martensite, as determined from a microscopical examination of a metallographically polished and etched specimen.
In cases of questionable interpretation, the attainment of the mechanical property requirements of Paragraph 6 shall be sufficient evidence of compliance.
QUALITY REQUIREMENTS of SAE 4340 forged parts
Forgings shall be free from cracks, seams, laps, shrinkage and other injurious
imperfections which, due to their nature or degree, would prevent fulfillment of the physical or mechanical requirements of the part.
The finished forging shall be magnetic particle inspected in accordance with ASTM A275, latest edition, and procedure ASTM E709, latest edition,
using the fluorescent method, and shall meet acceptance criteria as defined in Standard 21,125-00.
Ultrasonic inspection of the forging shall be conducted in accordance with the latest edition of ASTM A388, and shall meet acceptance criteria as defined in Standard 21,306-00.
INSPECTION AND QUALITY ASSURANCE REQUIREMENTS of finished SAE 4340 forging rings
Responsibility for Inspection
The supplier of the product shall be responsible for performing all required tests. Results of such tests shall be reported to the purchaser as required . Purchaser reserves the right to perform such confirmatory tests as he deems necessary to ensure that the product conforms to the requirements of this Specification.
The supplier shall furnish with each shipment three copies of a report showing the part drawing number, purchase order number, material specification number and edition, steel supplier and heat identification, and unique forging identification number.
Certification shall include:
a. Chemical analysis of each element specified
b. Mechanical properties and Brinell hardness
c. Statement of microstructure evaluation
d. Statement of compliance with ultrasonic test and magnetic particle inspection requirements, including reportable indications.
MARKING AND PACKING of AISI 4340 forged parts
Each forging shall be impression stamped or indelibly marked at the location designated on the drawing, with unique identifying number traceable to the chemical analysis, heat treatment records, and mechanical property and NDE certifications; and forging supplier name or identifying logo.
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