08KP High quality structural carbon steel

Steelun Designation of 08KP High quality structural carbon steel:

Name The value
Designation GOST Cyrillic 08кп
Designation GOST Latin 08kp
Transliteration 08kp
By chemical elements 08

Description Steelun of 08KP High quality structural carbon steel:

Steel 08KP is used: for the manufacture of sheet metal 1−3 mm 4−14 category, intended for cold forming; sheet rolled double-sided electrolytic coating and single-side polymer coating, used in the construction industry, commercial engineering, industrial ventilation, household appliances, decoration and other purposes; gaskets, washers, plugs, tubes, and parts subjected to chemical-thermal treatment of bushings, eyelets, rods; for the manufacture of parts by cold-forming steel has the ability to very deep drawing (VG); electrically welded tubes; wrapped soldered double-layer tubes for hydraulic system pipes combines, tractors, cars, refrigerators, enamelware, etc.; cold strip 0,05−4,00 mm, designed for bending, punching parts, manufacture of pipes, cored wire, parts, bearings and other metal products; details of electrical equipment of vehicles; electric cold pipes for propeller shafts of automobiles, tractors and machinery.

Note

Steel quality carbon structural magnetically soft. The degree of deoxidation — KP.

 Steelun Standards of 08KP High quality structural carbon steel:

Name Code Standards
Bars and shapes В32 GOST 1050-88, GOST 7417-75, GOST 8560-78, GOST 10702-78, GOST 14955-77, GOST 1050-2013, TU 14-1-2118-77, TU 14-1-3995-85, TU 14-11-245-88, TU 14-1-263-72, TU 14-1-1271-75, TU 14-136-367-2008
Sheets and strips В33 GOST 1577-93, GOST 4041-71, GOST 9045-93, GOST 13345-85, GOST 24244-80, TU 14-1-2039-77, TU 14-1-2456-78, TU 14-1-2473-78, TU 14-1-420-72, TU 14-1-4516-88, TU 14-1-5003-91, TU 14-15-117-83, TU 14-1-520-73, TU 14-1-524-73
Steel pipes and fittings to them В62 GOST 3262-75, GOST 5005-82, GOST 8639-82, GOST 8642-68, GOST 8644-68, GOST 8645-68, GOST 8646-68, GOST 10704-91, GOST 10705-80, GOST 10707-80, GOST 11249-80, GOST 13663-86, GOST 13664-68, TU 14-3-1542-87, TU 14-3-1569-88, TU 14-3-1034-81, TU 14-3-1428-86, TU 14-3Р-63-2002, TU 1373-022-05757850-08, TU 1373-013-02949352-2003
Tape В24 GOST 3560-73
Steel wire medium and high carbon В72 GOST 3920-70, GOST 7372-79, GOST 9389-75, GOST 9850-72, GOST 17305-91, GOST 26366-84
Tape В34 GOST 503-81, GOST 10234-77, GOST 19851-74, TU 14-1-754-73, TU 14-4-151-82, TU 14-1-1766-76, TU 14-1-3035-80, TU 14-1-357-72, TU 14-4-174-72
Low carbon steel wire В71 GOST 5663-79
Sheets and strips В23 GOST 82-70, GOST 14918-80, GOST 16523-97, GOST 19904-90, GOST 16523-89, GOST 16523-70, GOST 19903-90, TU 14-1-4695-89
Bars and shapes В22 GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 8319.0-75, GOST 9234-74, GOST 10551-75, GOST 11474-76, GOST 2590-2006, GOST 2879-2006, TU 14-2-341-78
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90
Non-ferrous metals, including rare, and their alloys В51 OST 4.021.009-92
Tape В54 TU 48-21-166-82

Chemical composition Steelun of 08KP High quality structural carbon steel:

Standard C S P Mn Cr Si Ni Fe Cu N As Al
TU 14-1-3995-85 0.04-0.08 ≤0.04 ≤0.035 ≤0.35 ≤0.05 ≤0.03 ≤0.1 Rest ≤0.25
GOST 1050-88 0.05-0.12 ≤0.04 ≤0.035 0.25-0.5 ≤0.1 ≤0.03 ≤0.3 Rest ≤0.3 ≤0.006 ≤0.08
GOST 24244-80 0.05-0.1 ≤0.04 ≤0.03 0.25-0.5 ≤0.1 ≤0.03 ≤0.3 Rest ≤0.3 ≤0.006 ≤0.08 ≤0.01
TU 14-1-520-73 0.05-0.12 ≤0.04 ≤0.035 0.25-0.5 ≤0.1 ≤0.03 ≤0.3 Rest ≤0.3 ≤0.006 ≤0.08
GOST 4041-71 0.05-0.1 ≤0.03 ≤0.025 0.25-0.45 ≤0.1 ≤0.03 ≤0.15 Rest ≤0.2 ≤0.006 ≤0.08
TU 14-1-1271-75 ≤0.08 ≤0.04 ≤0.035 ≤0.35 ≤0.05 ≤0.02 ≤0.1 Rest ≤0.25
TU 48-21-166-82 ≤0.08 ≤0.02 ≤0.015 0.25-0.4 ≤0.06 ≤0.01 ≤0.08 Rest ≤0.08 ≤0.01
GOST 9045-93 ≤0.1 ≤0.03 ≤0.025 ≤0.4 ≤0.03 Rest
Fe is the basis.
According to GOST 1050-88, the nitrogen content is specified for the steel of the oxygen-converter method of smelting. For all other types of smelting, the nitrogen content was N ≤ 0.008%.
According to TU 14-1-1271-75 and TU 14-1-3995-85, the total content of sulfur and phosphorus should be ≤ 0.070%.
According to GOST 4041-71 the chemical composition is given for steel used for the production of flat products of the third category. Rental of 1-2 categories are made by chemical composition GOST 1050.
According to GOST 503-81, in the production of a soft rubber tape intended for the vacuum-vacuum industry, the mass fraction of carbon should not be more than 0.08%, sulfur and phosphorus – not more than 0.022% each.
According to TU 14-1-3995-85

Steelun Mechanical properties of 08KP High quality structural carbon steel:

Section, mm sT|s0,2, MPa σU, MPa d5, % d4 d d10 y, % HB, MPa HRB
1-3
17-76
Tape flatted average strength of 0.1-4.0 mm according to GOST 10234-77 in the state of delivery (indicated delivery)
490-780
390-540
540-690
690-830
≤440 ≥20
≤410
Cold-rolled steel strip 0,05-4,00 mm according to GOST 503-81 on delivery
≥540
≤1.5 310-440 ≥17
1.55-2 310-440 ≥18
2.1-2.9 310-440 ≥20
3-4 310-440 ≥24
2.1-2.9 440-590 ≥4
3-4 440-590 ≥4
≤1.5 270-390 ≥23
1.55-2 270-390 ≥26
2.1-2.9 270-390 ≥30
3-4 270-390 ≥32
≤1.5 370-510 ≥7
1.55-2 370-510 ≥9
2.1-2.9 370-510 ≥10
3-4 370-510 ≥12
Rolled sheet 1-2 categories of heat-treated (annealing, normalization, high tempering or normalizing + tempering) in the delivery state according to GOST 4041-71
4-14 270-370 ≥34 ≥30 ≤100 ≤55
Wire for cold heading as supplied by GOST 5663-79
440-590 ≥55
≤590 ≥55
Longitudinal electric-welded pipes (Dy=10-530 mm) in the delivery condition. Listed marsvolta base metal
≥174 ≥294 ≥27
Hot-rolled steel and hot rolled with special surface finish
≤131
≤115
Steel calibrated and calibrated with special surface finish
≥370 ≥8 ≥60 ≤179
310-410 ≥60 ≤131
290-390 ≥60 ≤131
Steel hot-rolled sheet in the delivery condition on the other 14-1-520-73
4-7 270-380 ≥27
4-7 270-370 ≥34 ≥30 ≥100 ≤55
Sheet hire 3 categories of heat-treated (annealing, normalization, high tempering or normalizing + tempering) in the delivery state according to GOST 4041-71
4-8 ≤235 ≤360 ≥36 ≥32 ≤98 ≤54
Mechanical properties of heat-treated cold-rolled plates for cold forming according to GOST 9045-93 on delivery
≤0.7 250-390 ≥26
0.7-1.5 250-390 ≥28
1.5-2 250-390 ≥29
2-3.9 250-390 ≥30
Strip, hot-rolled or normalized
6-25 ≥175 ≥295 ≥35 ≥60
Cold roll for the enamelware according to GOST 24244-80 in the state of delivery (specify a group to exhaust the category of the quality)
0.5-1.5 ≥250 270-368 ≥30 ≥36
1.5-2 ≥235 270-368 ≥30 ≥36
2-2.5 ≥235 270-368 ≥32 ≥36
0.5-2 255-362 ≥28 ≥34
2-2.5 255-362 ≥30 ≥34
0.5-2 265-382 ≥26
2-2.5 265-382 ≥29
0.5-2 265-382 ≥25
2-2.5 265-382 ≥28
Pipe electric-welded profile in the delivery state according to GOST 13663-86 (samples)
≥314 ≥13
Pipe wrapped double-layer solder. Listed marsvolta metal pipes
3-6 ≥294 ≥29
8-15 ≥294 ≥26
Electric-welded cold-deformed pipes for cardan shafts according to GOST 5005-82
≥350 ≥390 ≥10
List 3 categories of heat-treated
365 ≥36
Hot-rolled sheet in the delivery condition. Group strength К260В
≤2 260-380 ≥25 ≤60
2-3.9 260-380 ≥28 ≤60
Cold-rolled sheet in the delivery condition. Group strength К260В
≤2 260-380 ≥26 ≤60
2-3.9 260-380 ≥29 ≤60
Cold-rolled steel strip
315-440 ≥17
440-590 ≥4
245-390 ≥23
370-510 ≥7

Description mechanical marks steelun of 08KP High quality structural carbon steel:

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
d Elongation after rupture
d10 Elongation after rupture
y The relative narrowing
HB Brinell hardness number
HRB Rockwell hardness (indenter steel, spherical)

Steelun Physical characteristics of 08KP High quality structural carbon steel:

Temperature Е, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m a, 10-6 1/°C С, J/(kg · °C)
0 203 7871 63 147
20 203 7871 63 147
100 207 7846 60 178 125 482
200 182 7814 56 252 134 498
300 153 7781 51 341 14 514
400 141 7745 47 448 145 533
500 7708 41 575 149 555
600 7668 37 725 151 584
700 7628 34 898 153 626
800 7598 30 1073 147 695
900 7602 27 1124 127 703
1000 127 703
1200 138 695
1300 7

A description of the physical symbols Steelun of 08KP High quality structural carbon steel:

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

Steelun Technological properties of 08KP High quality structural carbon steel:

Name The value
Weldability Welded without restriction, except for the parts after chemical and heat treatment; welding methods: SMAW, ADS submerged arc and gas protection, the CCC.
The tendency to temper brittleness Tend not.
The temperature of forging Start – 1250 °C, the end – of 800 °C. the cross Sections up to 300 mm are cooled in air.
Flock-sensitive sensitivity not sensitive.
Machinability In the hot rolled condition when blower SB 131 and HB=315-410 MPa Kn TV.SPL.=Of 2.1 Kn b.St.=Of 1.65.

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