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Steel 35X

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 35X

Steel 35X: 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 35X.

General information about steel 35X

Substitute brand
steel: 40Х, 35ХР.
Delivery type
Circle 35x, rolled sections, including shaped: GOST 4543−71, GOST 2590−71, GOST 2591−71, GOST 2879−69, GOST 10702−78. Calibrated bar GOST 7414−75, 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 8479−70, GOST 1131−71.
Application
axles, shafts, gears, ring rails and other upgradable parts.

The chemical composition of steel 35X

Chemical element %
Silicon (Si) 0.17−0.37
Manganese (Mn) 0.50−0.80
Copper (Cu), no more 0.30
Nickel (Ni), no more 0.30
Sulfur (S), no more 0.035
Carbon (C) 0.31−0.39
Phosphorus (P), no more 0.035
Chromium (Cr) 0.80−1.10

Mechanical properties of 35X steel

Mechanical properties

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 500 ° C, water or oil. 25 730 910 eleven 45 69  
Forgings. Hardening. Vacation. KP 395 100−300 395 615 fifteen 40 54 187−229
Forgings. Hardening. KP 490 vacation <100 490 655 sixteen 45 59 212−248

Mechanical properties at elevated temperatures

test t, ° C σ 0.2, MPa σ B, MPa δ 5 ,%
Hardening 840 ° С, oil. Vacation 580 ° C.
20 460 690 28
200 390 700 22
300 360 670 22
400 310 540 24

Mechanical properties depending on the tempering temperature

vacation t, ° С σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2
Hardening 850 ° C, water.
500 880 980 fifteen 53 98
600 680 830 19 61 127
700 540 710 24 68 166

Mechanical properties depending on the section

Section, mm σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2 HB
Normalization at 850 ° C. Vacation 660 ° C, air. Hardening 850 ° C, water. Vacation 570 ° C, water or oil
thirty 760 880 fifteen 50 78 262
50 650 820 fifteen 50 78 248
Normalization at 850 ° C. Vacation 660 ° C, air. Hardening 850 ° C, water. Vacation 610 ° C, water or oil
80 550 740 fifteen 50 78 217
120 490 700 fifteen 50 59 207
160 450 670 fifteen 50 59 197
240 390 630 fifteen 50 59 187

Technological properties of steel 35X

Forging temperature
Beginning 1250, end 800.
Weldability
restrictedly weldable. Welding methods: RDS, EShS. Heating and subsequent heat treatment is recommended. KTS — subsequent heat treatment is recommended.
Machinability by cutting
In the hot-rolled state at HB 163 and σ B = 610 MPa K υ b.st. = 0.95.
Tendency to release ability
inclined
Flock sensitivity
insensitive

Temperature of critical points of steel 35X

Critical point ° C
Ac1 743
Ac3 782
Ar3 730
Ar1 693
Mn 390

Impact strength of 35X steel

Impact strength, KCU, J / cm 2

Delivery status, heat treatment +20 -25 -70
Guenching 860 C, oil. Vacation 580 C. 101 69 48

Endurance limit of steel 35X

σ -1, MPa τ -1, MPa n σ B, MPa
362 240 1E + 6 690

Hardenability of steel 35X

Hardness for strips HRCe.

Distance from the end, mm / HRC e
1.5 3 4.5 6 7.5 nine 10.5 12 13.5 eighteen
44.5−55 42.5−54 40.5−53.5 36.5−53 32−51.5 29−48.5 28−45.5 25−43.5 23−43.5 20−36
Heat treatment Amount of martensite,% Crit. Diam. in oil, mm
Hardening 50 15−25

Physical properties of steel 35X

Test temperature, ° С 20 100 200 300 400 500 600 700 800 900
Normal elastic modulus, E, GPa 214     207   176        
Torsional shear elastic modulus G, GPa 83     74   65        
Thermal conductivity coefficient W / (m ° С)   47 43 40 36          
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) 11.3 12.0 12.9 13.7 14.2 14.6        

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