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Steel 15

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 15

Steel 15: 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 15.

General steel 15

Substitute brand
steel: steel 10, 20
Delivery type
Long products, including shaped: GOST 1050−74, GOST 2591−71, GOST 2879−69, GOST 8509−86, GOST 8510−86, GOST 8240−72, GOST 8239−72, GOST 2590−71. Calibrated bar GOST 7417−75, GOST 8559−75, GOST 8560−78, GOST 10702−78. Polished path and silver metal GOST 14955−77, GOST 10702−78. Thick sheet GOST 1577−81, GOST 19903−74. Thin sheet GOST 16523−70. Tape GOST 6009−74, GOST 2284−79, GOST 10234−77. Strip GOST 103−76, GOST 82−70. Wire GOST 5663−79, GOST 17305−71. Forgings and forged billets GOST 8479−70. Pipes GOST 10705−80, GOST 10704−91.
Application
Bolts, screws, hooks and other parts that require high ductility and work at temperatures from -40 to 450 ° C; after HTT — levers, cams, nuts and other parts, which are subject to the requirements of high surface hardness and low core strength.

Chemical composition of steel 15

Chemical element %
Silicon (Si) 0.17−0.37
Manganese (Mn) 0.35−0.65
Copper (Cu), no more 0.25
Arsenic (As), no more 0.08
Nickel (Ni), no more 0.25
Sulfur (S), no more 0.04
Carbon (C) 0.12−0.19
Phosphorus (P), no more 0.035
Chromium (Cr), no more 0.25

Mechanical properties of steel 15

Heat treatment, delivery condition σ B, MPa δ 5 ,% δ 4 ,% ψ,% HB
Hot rolled steel, forged, calibrated and silver grade 2 after normalization. 375 27   55  
Calibrated steel grade 5 after annealing or high tempering 345 23   55  
Calibrated and calibrated steel with special finishing after annealing or tempering 365−470     55 149
Calibrated and calibrated steel with special finishing after spheroidizing annealing 325−420     55 149
Steel calibrated and calibrated with a special finish, work-hardened without heat treatment 440 8   45 197
Normalized or hot rolled strips 370 27   55  
Hot rolled sheet 330−460   23    
Cold rolled sheet 330−460   24    

Mechanical properties of forgings

Heat treatment, delivery condition Section, mm σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2 HB
Nominalization
KP 175 <100 175 355 28 55 64 101−143
KP 175 100−300 175 355 24 50 59 101−143
KP 195 <100 195 390 26 55 59 111−156

Technological properties of steel 15

Forging temperature
Beginning 1300, end 700. Air cooling.
Weldability
No restrictions, except for XTO parts; welding methods: RDS, ADS submerged arc and gas protection, KTS.
Machinability by cutting
In the hot-rolled state at HB 143 K υ tv.spl. = 1.8.
Tendency to release ability
Not inclined.
Flock sensitivity
Not sensitive.

Temperature of critical points of steel 15

Critical point ° C
Ac1 735
Ac3 860
Ar3 840
Ar1 685

Impact strength of steel 15

Impact strength, KCU, J / cm 2

Delivery status, heat treatment +20 -20 -40 -60
Hot rolled 73−113 75−86 14−26 sixteen
Annealed 82−84 49−57 14−35 8
Normalized 120 53−80 66 48−65

Hardenability of steel 15

Hardness for hardenability strips, HRB.

Distance from the end, mm / HRC e
1.5 3 4.5 6 12 fifteen eighteen 21 24
102−108 94−99 90−96 88−91.5 82.5−99 79.5−87 78−84 75.5−81.5 74−80
 

Physical properties of steel 15

Test temperature, ° С 20 100 200 300 400 500 600 700 800 900
Normal elastic modulus, E, GPa 201 192 185 176 156          
Torsional shear elastic modulus G, GPa 83 78 77 74 71 68 63      
Density of steel, pn, kg / m 3 7850 7828 7794 7759 7724 7687 7648 7611 7599 7584
Thermal conductivity coefficient W / (m ° С) 53 53 53 49 46 43 39 36 32 thirty
Ud. electrical resistance (p, Nom. m)   233 296 387 487 607 753 904 1092 1140
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) 12.4 13.2 13.9 14.4 14.8 15.1 15.3 14.1 13.2 13.3
Specific heat (C, J / (kg ° C)) 465 486 515 532 565 586 620 691 708  

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