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Steel VSt3sp

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 VSt3sp

Steel VSt3sp: 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 VSt3sp.

General information about steel VSt3sp

Substitute brand
steel VSt3ps
Delivery type
Sections, including shaped: GOST 2590−71, GOST 2591−71, GOST 535−79, GOST 2879−69, GOST 19771−74, GOST 19772−74, GOST 8278−83, GOST 8281−80, GOST 8282 -83, GOST 8283−77, GOST 380−71, GOST 8509−86, GOST 8510−86, GOST 8239−72. Thick sheet GOST 19903−74. Thin sheet GOST 19903−74. Tape GOST 503−81, GOST 6009−74. Strip GOST 103−76, GOST 82−70, GOST 535−79. Forgings and forged billets GOST 8479−70. Pipes GOST 8734−75, GOST 10706−76, GOST 10705−80.
Application
Bearing elements of welded and non-welded structures and parts operating at positive temperatures. Shaped and flat rolled products (category 5) for load-bearing elements of welded structures operating under variable loads: with a rolled metal thickness of up to 25 mm in the temperature range from -40 to + 425 ° C; for rolled products with a thickness of over 25 mm — from -20 to + 425 ° C, subject to delivery with guaranteed weldability.

The chemical composition of steel VSt3sp

Chemical element %
Silicon (Si) 0.12−0.30
Manganese (Mn) 0.40−0.65
Copper (Cu), no more 0.30
Arsenic (As), no more 0.08
Nickel (Ni), no more 0.30
Sulfur (S), no more 0.05
Carbon (C) 0.14−0.22
Phosphorus (P), no more 0.04
Chromium (Cr), no more 0.30

Mechanical properties of steel VSt3sp

Mechanical properties at elevated temperatures

test t, ° C σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2
Hot-rolled billet with dimensions 140X120 mm
20 220 445 33 59 154
300 205       199
500 180 285 34 80 119
Hot-rolled sheet and structural shapes up to 30 mm thick
20 205−340 420−520 28−37 56−68  
200 215−285        
300 205−265        
400 155−255 275−490 34−43 60−73  
500 125−175 215−390 36−43 60−73  
Sample 6 mm in diameter, 30 mm long forged and normalized. Strain rate 16 mm / min, strain rate 0.009 1 / s
700 73 100 57 96  
800 51 63 95 95  
900 38 65 84 100  
1000 25 43 79 100  
1100 19 31 80 100  
1200 fourteen 25 84 100  

Mechanical properties of rolled products

Heat treatment, delivery condition Section, mm σ 0.2, MPa σ B, MPa δ 5 ,% δ 4 ,%
Hot rolled products <20 245 370−480 26  
Hot rolled products 20−40 235 370−480 25  
Hot rolled products 40−100 225 370−480 23  
Hot rolled products > 100 205 370−480 23  
Hot rolled sheets <2.0   370−480   20
Hot rolled sheets 2.0−3.9   370−480   22
Cold rolled sheets <2.0   370−480   22
Cold rolled sheets 2.0−3.9   370−480   24

Mechanical properties of forgings

Section, mm σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2 HB
Normalization
<100 175 353 28 55 64 101−143
100−300 175 353 24 50 59 101−143
<100 195 392 26 55 59 111−156
100−300 195 392 23 50 54 111−156

Technological properties of steel VSt3sp

Forging temperature
Beginning 1300, end 750. Air cooling.
Weldability
Can be welded without restrictions; welding methods: RDS, ADS submerged arc and gas shielded, EShS, KTS. For thicknesses over 36 mm, preheating and subsequent heat treatment are recommended.
Machinability by cutting
In the hot-rolled state at NV 124 σ B = 400 MPa, K υ tv.spl. = 1.8 and K υ b.st. = 1.6
Tendency to release ability
Not inclined
Flock sensitivity
Not sensitive

Temperature of critical points of steel VSt3sp

Critical point ° C
Ac1 735
Ac3 850
Ar3 835
Ar1 680

Impact strength of steel VSt3sp

Impact strength, KCU, J / cm 2

Delivery status, heat treatment +20 after mechanical aging -20
Sheet with a cross section of 5−9 mm 78 39 39
Sheet cross section 10−25 mm 68 29 29
Sheet cross section 26−40 mm 49    
Wide strip with a longitudinal section of 5−9 mm 98 49 49
Wide strip with a longitudinal section of 10−25 mm 78 29 29
Wide strip with a longitudinal section of 26−40 mm 68    
Sections and sections with a longitudinal section of 5−9 mm 108 49 49
Sections and sections with a longitudinal section of 10−25 mm 98 29 29
Sections and sections with a longitudinal section of 26−40 mm 88    

Endurance limit of steel VSt3sp

σ -1, MPa n σ B, MPa Heat treatment, steel condition
191 1E + 7   Hot rolled sheet 40 mm thick. The sample is smooth.
93 1E + 7   Specimens with a 10 mm diameter with a notch
213 2E + 5 440  

Physical properties of steel VSt3sp

Test temperature, ° С 20 100 200 300 400 500 600 700 800 900
Normal elastic modulus, E, GPa 194 192 187 183 178 167 159 146 120 99
Thermal conductivity coefficient W / (m ° С)   55 54 50 45 39 34 thirty    

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