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Steel 34ХН1М

VSt6ps VSt5sp VSt3kp VSt4kp VSt6sp VSt2kp Vst4ps St0 VSt2ps VSt3ps VSt5ps VSt2sp VSt3sp 18К 08ps 10ps 15К 18kp 20ps 35 55 05kp 08Ю 15kp 20 (20А) 22К 40 58 (55ПП) 08 10 (Art. 10) 12К 15pc 20К 25 45 60 08kp 10kp 15 16К 20kp 30 50 0cB 60С2 60C2XA 50XFA 60C2A 60C2CHFA 65C2VA 85 55XGR 65 70C3A 55С2 60Г 60C2H2A 65Г 70 75 SHKH15 SHKH15SG SH4 А12 А20 A40G А30 10XNDP 14G2AF 15G2AFDps 17GS 18G2AFps 09Г2 10G2BD 10ХСНД 12GS 15G2SFD 16GS 35GS 14CGS 15ХСНД 20ХГ2Ц 09G2S 10G2S1 14Г2 16G2AF 17G1S 25G2S 10Г2 14X2GMR 15KHF 18CR2N4MA 20Г 20X2H4A 20XGR 20KHN2M (20KHNM) 30Г 30CGS 30CRNI2MA 34CRNI3M 35Х 38CR2N3M 38XA 38CMA 3CR3M3F 40Х 40XFA 45CRN 50Г2 12XH2 15Х 20KHGSA 20XHN3A 25CGSA 30KHGSA 30CRNI2MOVA 33HS 35KHN1M2FA 38CR2NM 40Г 40CR2H2MA 40CRN 45Г 45CRNI2MOVA 50Х 12XH2A 18CGT 20CRNR 20CRNI4FA 25CGT 30Х 30CGSN2A 30KHN3A 34CRNI1M 35Г 36CR2NI2MOVA 38KH2NMF 38CRN 38CRNI3MA 40Г2 40CRNI2MA 45Г2 47GT 50XH 12CR2N4A 12XHN3A 15Г 18CR2N4VA 20Х 20XH 20XNR 30CGT 30ХН3М2ФА 35Г2 35CGSA 38CR2H2MA 38CRNI3MOVA 40HS 45Х 50Г

Description

Steel 34ХН1М

Steel 34ХН1М: a 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 grade — Steel 34HN1M.

General information about steel 34ХН1М

Substitute brand
steel 38Х2НМ, 34ХН3М, 38Х2Н2МА, 40Х2Н2МА.
Delivery type
Forgings and forged billets GOST 8479−70.
Application
Disks, shafts, turbine and compressor machine rotors, excavator shafts axles and couplings, gears, half-couplings, pinion shafts, bolts, power pins and other particularly critical high-loaded parts, which are subject to high mechanical properties and operating at temperatures up to 500 ° C.

Chemical composition of steel 34ХН1М

Chemical element %
Silicon (Si) 0.17−0.37
Manganese (Mn) 0.50−0.80
Molybdenum (Mo) 0.20−0.30
Nickel (Ni) 1.30−1.70
Sulfur (S), no more 0.035
Carbon (C) 0.30−0.40
Phosphorus (P), no more 0.030
Chromium (Cr) 1.30−1.70

Mechanical properties of steel 34ХН1М

test t, ° C σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2
Forging. Hardening 860 ° C, oil. Vacation 660 ° С
20 590−640 790−820 19−23 68 200−250
200 560 740 18−20 62−68  
300 520 730 fifteen 54−56  
400 480 630−670 19−21 72  
500 440−470 510−520 22−24 83−84  
Sample with a diameter of 6 and a length of 30 mm, pressed. Deformation speed 16 mm / sec. Strain rate 0.009 1 / s.
800 89 fifteen 49 84  
1000 39 58 46 65  
1200 20 27 45 100  

Mechanical properties of forgings

Heat treatment, delivery condition Section, mm σ 0.2, MPa σ B, MPa δ 5 ,% KCU, J / m 2 HB
Hardening. Vacation.
KP 315 300−500 315 570 12 29 167−207
Normalization
KP 395 <100 395 615 17 59 187−229
KP 395 100−300 395 615 fifteen 54 187−229
Hardening. Vacation.
KP 440 <100 440 635 sixteen 59 197−235
KP 440 100−300 440 635 fourteen 54 197−235
KP 440 300−500 440 635 thirteen 49 197−235
KP 440 500−800 440 635 eleven 39 197−235
KP 490 100−300 490 655 thirteen 54 212−248
KP 490 300−500 490 655 12 49 212−248
KP 490 500−800 490 655 eleven 39 212−248
KP 540 <100 540 685 fifteen 59 223−262
KP 540 100−300 540 685 thirteen 49 223−262
KP 540 300−500 540 685 12 44 223−262
KP 590 100−300 590 735 thirteen 49 235−277
KP 590 300−500 590 735 12 44 235−277
KP 640 <100 640 785 thirteen 59 248−293
KP 640 100−300 640 785 12 49 248−293
KP 685 <100 685 835 thirteen 59 262−311
KP 685 100−300 685 835 12 49 262−311
KP 735 <100 735 880 thirteen 59 277−321
Isothermal annealing at 860−870 ° C, holding at 640−660 ° C, then cooling with a furnace.
  <700 320 580 eleven thirty 167−207

Technological properties of steel 34ХН1М

Forging temperature
Beginning 1240, end 780. Sections up to 100 mm are cooled in air, 101−300 mm — in a pit.
Weldability
restrictedly weldable. Welding methods: RDS, EShS.
Machinability by cutting
After annealing at HB 210−230 σ B = 650 MPa K υ tv.spl. = 0.8.
Tendency to release ability
not inclined
Flock sensitivity
very sensitive

Temperature of critical points of steel 34ХН1М

Critical point ° C
Ac1 730
Ac3 780
Mn 320

Impact strength of steel 34ХН1М

Impact strength, KCU, J / cm 2

Delivery status, heat treatment +20 -20 -40 -60
Forgings with a cross section of 200 mm (the sample was cut out — 1 / 3R). Quenching in water by bathing. Vacation 620−640 С. 142 113 95 85
Forgings with a cross section of 101−300 mm (the sample is cut out — 1 / 3R). Hardening 850−870 C. Vacation 580−640 C. 50   thirty  
Forgings with a cross section of 301−500 mm (the sample is cut out — 1 / 3R). Hardening 850−870 C. Vacation 580−640 C. 45   25  

Endurance limit of 34ХН1М steel

σ -1, MPa n σ B, MPa σ 0.2, MPa Heat treatment, steel condition
165 1e + 7 760 610 Normalization 860−870 C. Hardening 850−870 C, oil. Vacation 620−645 C, exposure 6 h, air. HB 240−280 (Samples with concentrators. Bending in one plane)

Hardenability of steel 34ХН1М

Hardening 900 ° C, water.

Distance from the end, mm / HRC e
five 50 100 150
54.5 48.5 41.5 38.5
Amount of martensite,% Crit. Diam. in water, mm Crit. Diam. in oil, mm
100 60  
100% bainite   320

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