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DIN 1.6580 34CrNiMo6 Hot Rolled Steel Bar , High Tensile Alloy Round Bar Size 10-350mm

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DIN 1.6580 34CrNiMo6 Hot Rolled Steel Bar , High Tensile Alloy Round Bar Size 10-350mm

DIN 1.6580 34CrNiMo6 Hot Rolled Steel Bar , High Tensile Alloy Round Bar Size 10-350mm
DIN 1.6580 34CrNiMo6 Hot Rolled Steel Bar , High Tensile Alloy Round Bar Size 10-350mm DIN 1.6580 34CrNiMo6 Hot Rolled Steel Bar , High Tensile Alloy Round Bar Size 10-350mm

Large Image :  DIN 1.6580 34CrNiMo6 Hot Rolled Steel Bar , High Tensile Alloy Round Bar Size 10-350mm

Product Details:
Place of Origin: China
Brand Name: Unite Steel
Certification: ISO/SGS/BV/MTC
Model Number: Round bar
Payment & Shipping Terms:
Minimum Order Quantity: MOQ: 2-3 Ton
Price: USD 700-100 per Ton
Packaging Details: Standard seaworthy packing
Delivery Time: Within 15-45 days
Payment Terms: L/C, D/P, D/A, D/A, T/T, Western Union
Supply Ability: 3000 Ton per Month
Detailed Product Description
Product Namr: DIN 1.6580 34CrNiMo6 Hot Rolled Steel Bar , High Tensile Alloy Round Bar , Quenched& Tempered , Size 10-350mm Matrerila Grade: 4340/4337/34CrNiMo6/EN24/817M40/SNCM439/40NiCrMo6/1.6565
Delivery Condition: Annealed/hot Rolled/cold Drawn/quenched & Tempered Surface: Machined/peeled/polished/turned
Process: EAF+LF+VOD+ Rolled +Heat Treatment(optional) UT: Ultrasonic Test According To SEP 1921-84
Certificate: ISO/BV/SGS/MTC Shape: Round Section
High Light:

alloy steel round bar

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hot rolled round bar

 

DIN 1.6580 34CrNiMo6 Hot Rolled Steel Bar , High Tensile Alloy Round Bar Size 10-350mm

 

1.Specification:

Dia:10-350mm

Length: as your request:

 

2.Description:
34CrNiMo6 is a 1.8% nickel - chromium - molybdenum high hardenability high tensile steel - generally supplied hardened and tempered in the tensile range of 930 - 1080 Mpa (condition U) - (Rc 28 - 36).

Characterised by high strength and toughness in relatively large sections.
Pre hardened and tempered 4340 can be further surface hardened by flame or induction hardening and by nitriding.
34CrNiMo6 is used in most industry sectors for applications requiring higher tensile/yield strength than 4140 can provide.

 

3.APPLICATIONS:

Components for the aircraft, automotive, general engineering industries, Propeller shafts, connecting rods, gear shafts, and other automobile parts, Heavy forgings, Rotors, shafts, discs. Pulley shafts, gears, pins and axles, Heavy-duty axles, shafts, heavyduty gears, spindles, pins, studs, collets, bolts, couplings, sprockets, pinions, torsion bars, connecting rods, crow bars, conveyor parts etc. Used where higher yield and tensile strength than 4140 is required.


DIN 1.6580 34CrNiMo6 Hot Rolled Steel Bar , High Tensile Alloy Round Bar Size 10-350mm 0

4.Chemical Composition(%):

Carbon 0.37-0.44

Silicon 0.17-0.37

Manganese 0.50-0.80

Phosphorus 0.04 max

Sulphur 0.04 max

Chromium 0.60-0.90

Molybdenum 0.15-0.25

Nickel 1.25-1.85

 

5.Process: EAF+LF+VOD+ Rolled +Heat Treatment(optional)


DIN 1.6580 34CrNiMo6 Hot Rolled Steel Bar , High Tensile Alloy Round Bar Size 10-350mm 1

6.Test: Ultrasonic test according to SEP 1921-84 


7.Heat Treatment
Annealing
Heat to 800 oC - 850 oC, hold until temperature is uniform throughout the section and cool in furnace.
Flame or Induction Hardening
34CrNiMo6 hardened and tempered bar can be further surface hardened by either the flame or induction hardening methods resulting in a case hardness in excess of Rc 50. Parts should be heated as quickly as possible to the austenitic temperature range (830 oC - 860 oC) and required case depth followed by an immediate oil or water quench, depending upon hardness required, workpiece size/shape and quenching arrangements.
Following quenching to hand warm, most components should be tempered between 150 oC - 200 oC to remove quenching stresses in the case. This will have little effect on case hardness.
Hardening
Heat to 830 oC - 860 oC, hold until temperature is uniform throughout the section, soak for 10 - 15 minutes per 25 mm section, and quench in oil, water, or polymer as required.
*Temper immediately while still hand warm.
Nitriding
34CrNiMo6 hardened and tempered bar can also be successfully nitrided, giving a surface hardness of up to Rc 60. Nitriding is carried out at 490 oC - 530 oC, followed by slow cooling (no quench) reducing the problem of distortion. Parts can therefore be machined to near final size, leaving a grinding allowance only. The tensile strength of the core is usually not affected since the nitriding temperature range is generally below the original tempering temperature employed.
N.B. Nickel is inert to the action of nitrogen and in general resists its diffusion into steel. This can result in lower case hardness or longer nitriding cycle times for steels containing nickel such as 4340.
Stress Relieving
Heat to 600 oC - 650 oC, hold until temperature is uniform throughout the section, soak for 1 hour per 25 mm of section, and cool in still air.
Tempering
Re-heat to 450 oC - 660 oC as required, hold until temperature is uniform throughout the section, soak for 1 hour per 25 mm of section, and cool in still air.
N.B. Tempering should be avoided if possible within the range 250 oC - 450 oC due to temper brittleness.
Notes on Heat Treatment
Heating temperatures, rate of heating, cooling and soaking times will vary due to factors such as work piece size/shape also furnace type employed, quenching medium and work piece transfer facilities etc..

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