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SNCM439 / SAE4340 / 40CrNiMoa Alloy Steel Round Bar Forged 80mm Dia

SNCM439 / SAE4340 / 40CrNiMoa Alloy Steel Round Bar Forged 80mm Dia

SNCM439 / SAE4340 / 40CrNiMoa Alloy Steel Round Bar Forged 80mm Dia
SNCM439 / SAE4340 / 40CrNiMoa Alloy Steel Round Bar Forged 80mm Dia
Categories Steel Round Bar
Brand Name: Mittel
Model Number: SAE 4340
Certification: SGS ISO MTC
Place of Origin: China
MOQ: 100KGS
Price: 1.65USD/KG
Payment Terms: L/C, T/T
Supply Ability: 80000KGS
Delivery Time: 7 Working Days
Packaging Details: Wooden Pallet BOX
Steel grade: Alloy Steel
Alloy or not: Is Alloy
Technique: Hot Rolled,Forged,Cold Drawn
Application: Structural Steel Bar,Die Steel Bar,Tool Steel Bar
Type: Alloy Steel Bar
Standard: ASTM
Shape: Round
Length: 1--12m
Surface: black or bright
Diameter: 12mm-650mm
Dimensions: 5-900MM
Heat treatment: Normalized +Annealed +Quenched + Tempered
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Company Info.
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
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SNCM439 / SAE4340 / 40CrNiMoa Alloy Steel Round Bar Forged 80mm Dia

NCM439/4340/40CrNiMo Round Steel Bar
34CrNiMo6 / 1.6582 / 4340 / SNCM439 Alloy Steel Bar Round for Axle, Gear, Fastener
Equivalence
AISI / SAEDIN / W.NrJISGB
434034CrNiMo6
1.6582		SNCM43940CrNiMoA
Chemical Composition (%)
Steel GradeCSiMnPSCrMoNi
34CrNiMo6
1.6582		0.30
0.38		≤
0.40		0.50
0.80		≤
0.035		≤
0.035		1.30
1.70		0.15
0.30		1.30
1.70
43400.38
0.43		0.15
0.35		0.60
0.80		≤
0.035		≤
0.040		0.70
0.90		0.20
0.30		1.65
2.00
SNCM4390.36
0.43		0.15
0.35		0.60
0.90		≤
0.030		≤
0.030		0.60
1.00		0.15
0.30		1.60
2.00
Dimensions
Hot RolledForgedCold Drawn
Diameter (mm)10-260150-15002.5-70
Length (mm)4000-100003000-100004000-10000
Delivery Condition
EAF+LF+VD, Hot rolled, Forged or Cold drawn, Black surface or Machined surface (Peeled, Turned, Grinded), Annealed or Q+T, UT 100% Passed
mechnical data

40CrNiMoA Alloy Steel Mechanical Properties

  • Yield strength: ≥ 835 MPa
  • Tensile strength: ≥ 980 MPa
  • Elongation: ≥12%
  • Rate of reduction in area: ≥55%
  • Impact absorbing energy: ≥ 78 J
  • Material Brinell Hardness: ≤ 269 (Annealed or high temperature tempered steel rod)
  • Sample size: 25mm

Heat treatment specification

  • First quenching heating temperature: 850 °C (Quenchant– oil)
  • Tempering heating temperature: 600 °C (Quenchant– water, oil)

It was used where require high tensile and good wear-resistance property parts such as heavy-duty axles, shafts, heavy-duty gears, spindles, pins, studs, bolts, couplings, sprockets, pinions, torsion bars, connecting rods. These high tensile alloy steel has been widely used in the areas such as petrol chemical industry, automotive, steam power equipment and other high temperature services.


Characteristics
It is a low-alloy steel containing chromium and molybdenum and nickel as strengthening agents. The steel has good strength and toughness, hardenability and overheat resistance stability, also high susceptibility of flake formation and temper brittleness. Its poor weldability requires high temperature preheating and stress relieving, before and after process. It should be Hardened and tempered before application.
Applications
This low-alloy steel finds many applications where high strength, plasticity required such as large and important parts requiring hardening and tempering as heavy load axle for heavy machinery, axle with diameter over 250mm for steam turbine, axle of rotor wing for helicopter, axle of turbo and turbine blade and heavy load transmission part for jet engine, fasteners and gear for crank axle. It’s also used for rotor spindle and blade where temperature over 400℃. It can be used as important part with special properties after nitriding and ultrahigh strength steel after low tempering isothermal quenching.

Product Tags:

80mm Dia Alloy Round Bar

  

SNCM439 Alloy Round Bar

  

Forged Alloy Round Bar

  
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SNCM439 / SAE4340 / 40CrNiMoa Alloy Steel Round Bar Forged 80mm Dia

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