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Steel 33KHS

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 33KHS

Steel 33ХС: steels and alloys brand. 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 33ХС.

General information about steel 33ХС

Delivery type
Long products, including shaped: GOST 4543−71, GOST 259071, 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, GOST 4543−71.
Application
Improved spring-type parts of relatively small cross-sections, which require high strength, wear resistance and elasticity.

Chemical composition of steel 33ХС

Chemical element %
Silicon (Si) 1.00−1.40
Manganese (Mn) 0.30−0.60
Copper (Cu), no more 0.30
Nickel (Ni), no more 0.30
Sulfur (S), no more 0.035
Carbon (C) 0.29−0.37
Phosphorus (P), no more 0.035
Chromium (Cr) 1.30−1.60

Mechanical properties of steel 33HS

Heat treatment, delivery condition Section, mm σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2 HB
Quenching 920 ° C, oil or water, tempering 630 ° C, water or oil 25 690 880 thirteen 50 78  
Hardening 920−940 ° С, oil, tempering 250−270 ° С, air 40   1670 8 45 49 444−514
Normalization 920 ° С, air, tempering 650−670 ° С, air. 240 295 590 17 40 29 179

Mechanical properties depending on the tempering temperature

vacation t, ° С σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2 HB
Hardening 900 ° C, oil. Vacation 200−400 ° C, 2 h, air. Hardening 900 ° C, oil. Vacation 520−600 ° С, 2 h, water.
200 1610 1750 ten 48 88 510
320 1490 1640 ten 49 78 470
400 1340 1470 ten 52 59 430
520 1070 1180 fourteen 59 88 350
600 900 1110 eighteen 63 118 300

Mechanical properties depending on the section

Section, mm σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2 HB
Bar. Hardening 910 ° С, oil. Vacation 600−620 ° С, water.
thirty 780 940 12 50 59 285
50 670 860 12 50 59 255
Hardening 910 ° C, water. Vacation 600−620 ° С, water.
80 720 900 sixteen 50 59 262
120 650 840 sixteen 50 59  
160 510 720 sixteen 50 59 212
200 410 670 sixteen 50 59  
240 390 670 sixteen 50 59  

Technological properties of steel 33ХС

Forging temperature
The beginning is 1200, the end is 850.
Weldability
difficult to weld. Welding methods: RDS — heating and subsequent heat treatment are required. KTS — subsequent heat treatment is required.
Machinability by cutting
at HB 229−269, K υ tv.spl. = 0.7, K υ b.st. = 0.4.
Tendency to release ability
inclined
Flock sensitivity
not sensitive

Temperature of critical points of steel 33ХС

Critical point ° C
Ac1 755
Ac3 830
Ar1 715

Impact strength of steel 33ХС

Impact strength, KCU, J / cm 2

Delivery status, heat treatment +20 -20 -40 -50
Normalization 920 C. Vacation 650 C. Quenching 910 C, oil. Vacation 610 С, water. 59 44 35 29

Endurance limit of steel 33HS

σ -1, MPa σ B, MPa σ 0.2, MPa
363 880 690

Hardenability of steel 33ХС

Hardening 840 C. Hardness HRCэ.

Distance from the end, mm / HRC e
1.5 3 6 12 eighteen 24 thirty 36 42
54 54 52.5 47.5 37.5 thirty 25.5 23 22.5
Heat treatment Crit. Diam. in water, mm Crit. Diam. in oil, mm
Hardening 50 thirty

Physical properties of steel 33HS

Test temperature, ° С 20 100 200 300 400 500 600 700 800 900
Normal elastic modulus, E, GPa 214 206 196 186 176 168 157 137 127  
Torsional shear elastic modulus G, GPa 84 80 76 73 69 65 61 53 49  
Density of steel, pn, kg / m 3 7640                  
Thermal conductivity coefficient W / (m ° С) 40 38 37 37 35 33 31 29 27  
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) 12.0 12.8 13.4 13.7 14.3 14.7 15.0 12.4    
Specific heat (С, J / (kg ° С)) 466 508 529 563 592 622 634 664    

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