JIANGSU MITTEL STEEL INDUSTRIAL LIMITED

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

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

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

MOQ： 100KGS
Price： 1.65USD/KG
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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
Brand Name	Mittel
Model Number	SAE 4340
Certification	SGS ISO MTC
Place of Origin	China

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Product Details
Company Details

Product Specification


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
Brand Name	Mittel	Model Number	SAE 4340
Certification	SGS ISO MTC	Place of Origin	China
High Light	80mm Dia Alloy Round Bar ，SNCM439 Alloy Round Bar ，Forged Alloy Round Bar

NCM439/4340/40CrNiMo Round Steel Bar

34CrNiMo6 / 1.6582 / 4340 / SNCM439 Alloy Steel Bar Round for Axle, Gear, Fastener

Equivalence

AISI / SAE	DIN / W.Nr	JIS	GB
4340	34CrNiMo6 1.6582	SNCM439	40CrNiMoA

Chemical Composition (%)

Steel Grade	C	Si	Mn	P	S	Cr	Mo	Ni
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
4340	0.38 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
SNCM439	0.36 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 Rolled	Forged	Cold Drawn
Diameter (mm)	10-260	150-1500	2.5-70
Length (mm)	4000-10000	3000-10000	4000-10000

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.

Company Details

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Business Type:

Manufacturer,Distributor/Wholesaler,Agent,Exporter,Seller 
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Year Established:

1998 
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Total Annual:

80Millen-100 Millen
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Employee Number:

200~500 
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Ecer Certification：

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Jiangsu Mittel Steel Industrial Limited is located in Wuxi City, a beautiful city near Shanghai. Wuxi is close to Shanghai (BAO STEEL) ,Zhangjiagang (ZPSS),Ningbo (BAO XIN),KUN SHAN (DKSS), enjoy excellent geographic location and convenient water, land and air transporta... Jiangsu Mittel Steel Industrial Limited is located in Wuxi City, a beautiful city near Shanghai. Wuxi is close to Shanghai (BAO STEEL) ,Zhangjiagang (ZPSS),Ningbo (BAO XIN),KUN SHAN (DKSS), enjoy excellent geographic location and convenient water, land and air transporta...

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