St6sp Structural carbon steel of ordinary quality

Steelun Designation of St6sp Structural carbon steel of ordinary quality:

Name The value
Designation GOST Cyrillic Ст6сп
Designation GOST Latin Ct6cp
Transliteration St6sp
By chemical elements 6
Name The value
Designation GOST Cyrillic ВСт6сп
Designation GOST Latin BCt6cp
Transliteration VSt6sp
By chemical elements 6

Description Steelun of St6sp Structural carbon steel of ordinary quality:

St6sp steel is used: for the manufacture of Bab hammers, spindles, wedges, construction scrap and other parts exposed to impact loads; parts of high strength (axles, shafts, fingers, pistons and other parts in heat treated condition); rod of rebar periodic profile, a trapezoidal profile for a bit and strip profile with thickening of agricultural machinery; two-headed rails, t-type P5, is designed for ground and suspended tracks.

Note

The degree of deoxidation — SP.

Steelun Standards of St6sp Structural carbon steel of ordinary quality:

Name Code Standards
Steel pipes and fittings to them В62 GOST 3262-75, GOST 8732-78, GOST 9567-75, GOST 8731-87, GOST Р 53383-2009, TU 14-3-1160-83, TU 14-3-1428-86, TU 14-3-1473-87, TU 14-3Р-50-2001, TU 14-3-1654-89
Tape В24 GOST 3560-73, STP М309-74
Classification, nomenclature and General rules В20 GOST 380-2005
Bars and shapes В22 GOST 5422-73, GOST 5781-82, GOST 8239-89, GOST 8240-97, GOST 8509-93, GOST 8510-86, GOST 12492.3-90, GOST 12492.8-90, GOST 12492.10-90, GOST 19240-73, GOST 19425-74, GOST 535-2005, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006, OST 5.9086-85, OST 5.9087-84
Sheets and strips В23 GOST 82-70, GOST 14918-80, GOST 19903-74, GOST 103-2006, GOST 19903-90
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90
Sheets and strips В33 TU 14-1-4431-88
Bars and shapes В32 TU 14-2-849-89, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008

Chemical composition Steelun of St6sp Structural carbon steel of ordinary quality:

Standard C S P Mn Cr Si Ni Fe Cu N As
GOST 380-2005 0.38-0.49 ≤0.05 ≤0.04 0.5-0.8 ≤0.3 0.15-0.3 ≤0.3 Rest ≤0.3 ≤0.012 ≤0.08
Fe is the basis.
The nitrogen content is indicated for steel smelted in electric furnaces. In open-hearth and converter steels, the content of N≤0.010%.

Steelun Mechanical properties of St6sp Structural carbon steel of ordinary quality:

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
Long products
≥325 ≥535 ≥25 ≥52
≥305 ≥505 ≥20 ≥53
≥305 ≥39
≥200 ≥21 ≥51
≥180 ≥500 ≥23 ≥64
≥150 ≥355 ≥24 ≥70
≥81 ≥190 ≥35 ≥83
Rolled steel in the delivery state
≤25 ≥325 ≥535 ≥25 ≥52 ≥630
The hot rolled shapes in the state of delivery
20-40 ≥305 ≥590 ≥14
20 ≥315 ≥590 ≥15
40 ≥295 ≥590 ≥12
Seamless hot deformed tubes in the delivery condition
≥305 ≥590 ≥14
Normalization at 840-880 °C, air cooling to 450-500 °C + High tempering at 620-650 °C
300 ≥640 ≥23 ≥42
Forgings. Quenching in water from 840-860 °C + Vacation at 600-640 °C
220 390-530 670-810 18-23 50-57 390-640
Forgings. Quenching in oil 840-860 °C + Vacation at 580-620 °C
220 390-530 700-850 17-24 46-54 340-540
Forgings. Isothermal annealing at 830-860 °C + Isothermal holding at 630-660 °C
400 ≥640 ≥22 ≥42
Forgings. Annealing at 830-860 °C
400 ≥670 ≥19 ≥36
A sample with a diameter of 10 and a length of 100 mm laminated. The rate of deformation of 120 mm/min and strain Rate of 0.02 1/s
≥165 ≥33 ≥94
≥105 ≥62 ≥95
≥75 ≥50 ≥93
A sample with a diameter of 10 and a length of 50 mm laminated. The strain rate of 120 mm/min strain Rate of 0.04 1/s
≥55 ≥92 ≥100
≥37 ≥100 ≥100
≥27 ≥106 ≥100

Description mechanical marks steelun of St6sp Structural carbon steel of ordinary quality:

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
KCU Toughness

Steelun Physical characteristics of St6sp Structural carbon steel of ordinary quality:

Temperature Е, HPa G, HPa
0 197 82
20 197
100 197 80
200 186 77
300 175 74
400 168 71
500 67
600 62

A description of the physical symbols steelun of St6sp Structural carbon steel of ordinary quality:

Name Description
Е The normal elasticity modulus
r Density
l Coefficient of thermal conductivity
R UD. the resistivity

Steelun Technological properties of St6sp Structural carbon steel of ordinary quality:

Name The value
Weldability Limited weldability; welding methods: SMAW, ADS submerged arc and gas protection electroslag welding. Recommended heating and subsequent heat treatment. The CCC without restriction.
The tendency to temper brittleness Tend not.
The temperature of forging Start – 1250 °C, the end – 780 °C. the cross Sections up to 400 mm are cooled in air.
Flock-sensitive sensitivity not sensitive.
Machinability In hot-rolled state when HB 158 and blower SB=640 MPa Kn TV.SPL.=1,2 Kn b.St.=1,2.

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