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Steel 30KHN2MFA

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 30KHN2MFA

Steel 30KHN2MFA: 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 30XN2MFA.

General information about steel 30HN2MFA

Substitute brand
steel 30XN2VFA.
Delivery type
Long products, including shaped: GOST 4543−71, GOST 2590−71, GOST 2591−71, GOST 2879−69. Calibrated bar GOST 4543−71, GOST 7417−75, GOST 8559−75, GOST 8560−78, GOST 10702−78. Polished bar and silver bar GOST 4543−71, GOST 14955−77. Strip GOST 103−76. Forgings and forged billets GOST 1133−71, GOST 8479−70.
Application
Shafts, solid forged rotors, discs, gearbox parts, bolts, studs and other critical parts of turbines and compressor machines operating at elevated temperatures.

Chemical composition of steel 30KhN2MFA

Chemical element %
Vanadium (V) 0.10−0.18
Silicon (Si) 0.17−0.37
Manganese (Mn) 0.30−0.60
Copper (Cu), no more 0.30
Molybdenum (Mo) 0.20−0.30
Nickel (Ni) 2.00−2.40
Sulfur (S), no more 0.025
Carbon (C) 0.27−0.34
Phosphorus (P), no more 0.025
Chromium (Cr) 0.60−0.90

Mechanical properties of steel 30XN2MFA

Heat treatment, delivery condition Section, mm σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2 HB
Bar. Hardening 860 ° C, oil. Vacation 680 ° C, air.
  25 785 880 ten 40 88  
Forgings. Hardening. Vacation.
KP 490 100−300 490 655 thirteen 40 54 212−248
KP 490 300−500 490 655 12 35 49 212−248
Bar. Hardening 850 ° С, oil. Vacation 200 ° C, air.
  fifteen 1470 1710 eleven 50 58  

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.
200 1460 1650 8 51 68 50
300 1400 1550 8 55 54 48
400 1310 1410 nine 56 65 44
500 1190 1230 ten 58 93 40

Mechanical properties depending on the section

Heat treatment, delivery condition σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2
Hardening 860 ° C, oil. Vacation 680 ° С, exposure 1.5 h.
Sample cutting location — center 680 940 sixteen 58 140
Sample cutting location — edge 790 890 19 66 170
Sample cutting location — center 740 900 20 65 170

Mechanical properties versus test temperature

test t, ° C σ B, MPa δ 5 ,% ψ,%
Samples with a cross section of 10 mm. Hardening 860 ° C, oil. Vacation 500 ° C.
250 1160 thirteen 65
400 920 thirteen 68
500 680 36 79

Technological properties of steel 30XN2MFA

Forging temperature
Early 1200, late 800. Slow cooling.

Temperature of critical points of steel 30XN2MFA

Critical point ° C
Ac1 720
Ac3 830
Ar3 555
Ar1 365

Impact toughness of steel 30XH2MFA

Impact strength, KCU, J / cm 2

Delivery status, heat treatment +20 -40 -60
Guenching 860 C, oil. Vacation 200 C. 68 60 56
Guenching 860 C, oil. Vacation 300 C. 55 50 46
Guenching 860 C, oil. Vacation 400 S. 62 53 50
Guenching 860 C, oil. Vacation 500 S. 82 70 61

Hardenability of steel 30XN2MFA

Distance from the end, mm / HRC e
 
 
Heat treatment Crit. Diam. in water, mm Crit. Diam. in oil, mm Crete. hardness, HRCэ
Tempering 860 C. 60   45−51
Tempering 860 C.   60 37−42

Physical properties of steel 30HN2MFA

Test temperature, ° С 20 100 200 300 400 500 600 700 800 900
Normal elastic modulus, E, GPa 216 207 206 188 176 169        
Torsional shear elastic modulus G, GPa 87 81 77 73 68 64        
Thermal conductivity coefficient W / (m ° С) 36 35 35 34 32 31 29 28 27  
Ud. electrical resistance (p, Nom. m) 333                  
Test temperature, ° С 20−100 20−200 20−300 20−400 20−500 20−600 20−700 20−800 20−900 20−1000
Linear expansion coefficient (a, 10−6 1 / ° С) 11.1 11.7 12.3 12.9 13.3 13.7        
Specific heat (C, J / (kg ° C)) 466 508 529 567 588          

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