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DIN 1.6511 / AISI 4340

DIN 1.6511 / AISI 4340



Product Description

1.6511 / 36CrNiMo4 Alloy Structure Steel

Standards

DIN

AISI

JIS

ГОСТ

36CrNiMo4

1.6511

4340

SNCM439

40XHMA

 

Chemical composition (typical analysis in %)

C

Si

Mn

P

S

Cr

Mo

Ni

0.38-0.42

0.15-0.35

0.60-0.80

≤0.030

≤0.030

0.70-0.90

0.20-0.30

1.65-2.00

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Steel properties :

Nickel chromium molybdenum alloy steel specification widely used in the oil and gas sectors. 4340 steel offers toughness and high strength in the heat treated condition, with good fatigue strength. Available in round bar 4340 is available fully certified and suitable for applications requiring a quality high tensile alloy steel.

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Applications :

 

Suited for shock loading or stress concentration applications such as shafts, gears, bolts, nuts, pins and couplings.

 

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Size range :

Diameter (mm)

Thickness (mm)

Width (mm)

130 - 1200

 

 

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Delivery condition :

Soft annealed to max. 250 HB / Quenched and Tempered (+QT)

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Heat Treatment:

Soft annealing

Temperature(°C)

Cooling

Hardness

650 - 700

furnace

max. 250 HB

 

Forging

Temperature(°C)

Cooling

 

 

850 - 1050

furnace

 

 

Hardening

Temperature(°C)

Cooling

Tempering

 

850 - 860

oil or air

see tempering diagram

 

 

 

Remarks: All technicial information is for reference only.

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