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Steel 38KH2N3M

Description

Steel 38KH2N3M

Steel 38Х2Н3М: brand of steels and alloys. Below is the systematized information on the purpose, chemical composition, types of supplies, substitutes, temperature of critical points, physical, mechanical, technological and casting properties for the brand — Steel 38X2H3M.

General information about steel 38Х2Н3М

Application
Responsible container parts with high mechanical requirements properties at elevated temperatures.

Chemical composition of steel 38Х2Н3М

Chemical element %
Silicon (Si) 0.17−0.37
Manganese (Mn) 0.50−0.80
Molybdenum (Mo) 0.30−0.40
Nickel (Ni) 2.75−3.25
Sulfur (S), no more 0.035
Carbon (C) 0.35−0.42
Phosphorus (P), no more 0.030
Chromium (Cr) 1.00−1.50

Mechanical properties of steel 38Х2Н3М

Mechanical properties of forgings

Heat treatment, delivery condition Section, mm σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2 HB
Hardening 850−870 ° С, oil. Vacation 560−620 ° С, cooling with oven
KP 900 101−300 900 1000 12 35 60 302−340
KP 800 301−500 800 950 eleven thirty 50 263−331
KP 750 501−800 750 900 eleven thirty 40 277−321
  801−1300           241−321
Normalization 850−870 ° С, air. Vacation 560−620 ° С, cooling with oven
KP 750 301−500 750 900 eleven thirty 40 277−321
KP 700 501−800 700 850 ten thirty 40 262−311
  801−1300           229−302

Mechanical properties versus test temperature

test t, ° C σ 0.2, MPa σ B, MPa δ 5 ,% HB
Forgings up to 600 mm. Normalization 850−870 ° С, air. Vacation 500−550 ° С, cooling with oven
20 800 900 eleven 269−321
450 650 800 eleven  
Forgings up to 600 mm. Hardening 850−870 ° С, oil. Vacation 510−540 ° С, oven cooling.
20 1000 1100 eleven 321−388
450 750 850 12  
500 700 800 12  
Forgings up to 600 mm. Hardening 850−870 ° С, oil. Vacation 550−580 ° C, oven cooling.
20 800 900 12 269−321
450 700 800 12  
500 650 750 12  

Technological properties of steel 38Х2Н3М

Forging temperature
The beginning is 1200, the end is 850.
Weldability
difficult to weld
Tendency to release ability
not inclined
Flock sensitivity
very sensitive

Hardenability of steel 38Х2Н3М

Distance from the end, mm / HRC e
 
 
Amount of martensite,% Crit. Diam. in water, mm Crit. Diam. in oil, mm Crete. hardness, HRCэ Dist. from the cooled end
100 230   51.5 80
100% bainite   1000 48.5 200

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