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Steel 20KHGNR

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 20KHGNR

Steel 20KHGNR: a brand of steels and alloys. Below is a 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 20HGNR.

General information about steel 20ХГНР

Substitute brand
steel: 20ХН3А, 12ХН2, 12ХН3А.
Delivery type
Long products, including shaped: GOST 4543−71, GOST 2590−71, GOST 2591−71, GOST 2879−69. Calibrated bar GOST 7417−75, GOST 8559−75, GOST 8560−78, GOST 1051−73. Polished bar and silver bar GOST 14955−77. Strip GOST 103−76. Forgings and forged billets GOST 1133−71. Pipes OST 14−21−77.
Application
Gear wheels, pinion shafts, worms, cam couplings, bushings and other critical parts operating under shock loading conditions.

Chemical composition of steel 20HGNR

Chemical element %
Boron (B) 0.001−0.005
Silicon (Si) 0.17−0.37
Manganese (Mn) 0.70−1.00
Copper (Cu), no more 0.30
Nickel (Ni) 0.80−1.10
Sulfur (S), no more 0.035
Titanium (Ti), no more 0.06
Carbon (C) 0.16−0.23
Phosphorus (P), no more 0.035
Chromium (Cr) 0.70−1.10

Mechanical properties of steel 20HGNR

Mechanical properties at elevated temperatures

test t, ° C σ 0.2, MPa σ B, MPa δ 5 ,% ψ,%
Sample 10 mm in diameter, 50 mm long, rolled. Deformation rate 20 mm / min. Strain rate 0.007 1 / s.
800 115 12 41 84
900 73 81 47 100
1000 32 44 58 100
1100 19 29 63 100
1200 fifteen 25 76 100

Mechanical properties depending on the tempering temperature

vacation t, ° С σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2 HRC e
Hardening 860 ° C, oil. Cooling after tempering in oil.
200 1250 1510 eleven 55 61 47
300 1230 1400 8 50 62 47
400 1180 1240 eleven 58 69 43
500 970 970 fourteen 64 125 33
600 690 820 17 65 182 27

Mechanical properties depending on the section

Section, mm σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2 HB
Rods. Normalization 930 ° C, air. Hardening 840 ° С, oil. Vacation 200 ° C, air.
25 1370 1420 fourteen 60 108 418
50 1110 1200 12 62 147 340
75 970 1060 fifteen 60 108 302
100 920 1000 fifteen 60 127 302
150 830 1000 sixteen 50 98 286

Mechanical properties of the bar

Section, mm σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2 HB HRC e
Normalization 930−950 ° C, air. Hardening 780−830 ° С, oil. Vacation 200 ° C, air or oil
fifteen 1080 1270 ten 50 88    
Cementation 930−950 ° C. Hardening 830−850 ° С, oil. Vacation 170−230 ° С, air.
fifteen 1360 1460 thirteen 60 118   57−63
25 1310 1410 fourteen 64 127   57−63
50 1160 1260 thirteen 64 127 340 57−63
75 1080 1140 12 60 127 321 57−63
100 930 1040 17 66 127 302 57−63
150 880 1040 17 50 108 286 57−63

Technological properties of steel 20HGNR

Forging temperature
Beginning 1150, end 800. Sections longer than 60 mm are cooled slowly.
Weldability
RDS. Heating and subsequent heat treatment are recommended.
Tendency to release ability
inclined
Flock sensitivity
sensitive

Temperature of critical points of steel 20HGNR

Critical point ° C
Ac1 740
Ac3 830
Ar3 725
Ar1 650
Mn 365

Impact strength of steel 20KhGNR

Impact strength, KCU, J / cm 2

Delivery status, heat treatment +20 -20 -40 -60 -80
Guenching 860 C, oil. Vacation 200 С, oil. HRCе 47 61 61 62 60 61
Guenching 860 C, oil. Vacation 500 С, oil. HRCэ 33 125 110 120 117 89

Endurance limit of steel 20ХГНР

σ -1, MPa n σ B, MPa Heat treatment, steel condition
590 1E + 7 1480 Normalization 930 C, 3 h, air. Tempering 840 C, oil. Vacation 200 С, 2 h.

Hardenability of steel 20HGNR

Tempering 860 C.

Distance from the end, mm / HRC e
1.5 3 4.5 6 nine 12 fifteen 21 27 39
43−48.5 43.5−49 43−49.5 42.5−49.5 41−49.5 39.5−49 38−48.5 35−47.5 31−45 26−40
Heat treatment Crit. Diam. in oil, mm Crete. hardness, HRCэ
Tempering 820 C. 100 39−41
  50 40−44

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