St5sp Structural carbon steel of ordinary quality

Steelun Designation of St5sp Structural carbon steel of ordinary quality:

Name The value
Designation GOST Cyrillic Ст5сп
Designation GOST Latin Ct5cp
Transliteration St5sp
By chemical elements 5

Description Steelun of St5sp Structural carbon steel of ordinary quality:

St5sp steel is used: for the manufacture of parts riveted structures, bolts, nuts, handles, rods, bushings, undercarriage rollers, wedges, pins, levers, stops, pins, fingers, rods, sprockets, tubular grilles, flanges and other parts operating at temperatures from 0 °C to +425 °C; forgings seniam to 800 mm. strength classes KP 175, KP 195; forgings seniam to 300 mm. strength KP 215; forgings seniam to 100 mm. strength KP 245; for casting parts of pipe fittings; hot pan, odnoselchanka and C-shaped profiles for agricultural machinery; hot rolled profiles for the production of rims for agricultural machines; knives for earth-moving machinery (bulldozers, scrapers, graders and graders, as well as to the dozer and grader blades equipment excavators, rollers and other earth moving machines); two-headed rails, t-type P5, is designed for ground and suspended tracks.

Note

The degree of deoxidation — SP.

Steelun Standards of St5sp Structural carbon steel of ordinary quality:

Name Code Standards
Steel pipes and fittings to them В62 GOST 3262-75, GOST 8639-82, 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
Rails. Lining. Lining. Crutches В42 GOST 3280-84, GOST 7056-77, GOST 8194-75, GOST 12135-75
Tape В24 GOST 3560-73, GOST 6009-74, 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 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 8320.0-83, GOST 8509-93, GOST 8510-86, GOST 9234-74, GOST 10884-94, GOST 11474-76, GOST 12492.1-90, GOST 12492.2-90, GOST 12492.4-90, GOST 12492.5-90, GOST 12492.13-90, GOST 17152-89, GOST 19240-73, GOST 19425-74, GOST 19771-93, GOST 19772-93, GOST 535-2005, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006, OST 5.9086-85, OST 5.9087-84, TU 14-2-949-91, TU 14-1-5254-94
Sheets and strips В23 GOST 82-70, GOST 14637-89, GOST 14918-80, GOST 16523-97, GOST 19903-74, GOST 16523-89, GOST 16523-70, GOST 103-2006, GOST 19903-90, TU 14-1-3023-80
Processing of metals by pressure. Forgings В03 GOST 8479-70, OST 5Р.9125-84
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90
Thermal and thermochemical treatment of metals В04 ST ЦКБА 026-2005
Sheets and strips В33 TU 108.1273-84, TU 14-1-5241-93, 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 St5sp Structural carbon steel of ordinary quality:

Standard C S P Mn Cr Si Ni Fe Cu N As
TU 108.1273-84 0.28-0.37 ≤0.05 ≤0.04 0.5-0.8 ≤0.3 0.15-0.35 ≤0.3 Rest ≤0.3 ≤0.012 ≤0.08
GOST 380-2005 0.28-0.37 ≤0.05 ≤0.04 0.5-0.8 ≤0.3 0.15-0.35 ≤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%.
According to TU 108.1273-84, deviations in nickel + 0.20%, copper + 0.20% are allowed.

Steelun Mechanical properties of St5sp Structural carbon steel of ordinary quality:

Section, mm sT|s0,2, MPa σU, MPa d5, % d4 y, % KCU, kJ/m2 HB, MPa
Long products
≥320 ≥490 ≥28 ≥58
≥165 ≥470 ≥66
≥150 ≥330 ≥70
≥73 ≥155 ≥44 ≥92
The hot rolled plate, long products and fittings as supplied
≤10 ≥295 490-630 ≥20
10-20 ≥285 490-630 ≥20
20-40 ≥275 490-630 ≥19
40-100 ≥265 490-630 ≥17
100 ≥255 490-630 ≥17
Rolled plates as supplied by TU 14-1-5241-93. Quenching + Tempering (samples transverse)
20-40 ≥275 490-630 ≥19
40-50 ≥265 490-630 ≥17
8-20 ≥285 490-630 ≥20
Hot-rolled sheet in the delivery condition. Group strength ОК400В
≤2 400-680 ≥17
2-3.9 400-680 ≥19
Cold-rolled sheet in the delivery condition. Group strength ОК400В
≤2 400-680 ≥19
2-3.9 400-680 ≥21
Forgings. After normalization
100-300 ≥175 ≥350 ≥24 ≥50 ≥590 101-143
300-500 ≥175 ≥350 ≥22 ≥45 ≥540 101-143
500-800 ≥175 ≥350 ≥20 ≥40 ≥490 101-143
100-300 ≥195 ≥390 ≥23 ≥50 ≥540 111-156
300-500 ≥195 ≥390 ≥20 ≥45 ≥490 111-156
500-800 ≥195 ≥390 ≥18 ≥38 ≥440 111-156
100-300 ≥215 ≥430 ≥20 ≥48 ≥490 123-167
100 ≥245 ≥470 ≥22 ≥48 ≥490 143-179
Blank pieces of pipe fittings. Extract at 850-880 °C (2.5-4.0 hours depending on the thickness and weight of the workpiece) annealing in air
≤100 ≥245 ≥470 ≥22 ≥48 ≥490 143-179
100-500 ≥195 ≥390 ≥20 ≥45 ≥490 111-156
Seamless hot deformed tubes in the delivery condition heat treated
≥275 ≥490 ≥17
The sample is diameter 5 mm, length 25 mm, prokatnyh. The rate of deformation of 2 mm/min strain rate of 0.001 1/s
≥40 ≥66 ≥62 ≥90
≥37 ≥49 ≥81 ≥90
≥14 ≥28 ≥65 ≥90
≥16 ≥59 ≥90

Description mechanical marks steelun of St5sp 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
d4 Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number

Steelun Physical characteristics of St5sp Structural carbon steel of ordinary quality:

Temperature Е, HPa G, HPa
Temperature Е, HPa G, HPa
20 198 81
100 196 80
200 191 77
300 185 74
400 164 71
500 67
600 62

A description of the physical symbols steelun of St5sp Structural carbon steel of ordinary quality:

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

Steelun Technological properties of St5sp 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 – 1260 °C, the end – 750 °C. the cross Sections up to 800 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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