Steel 15kp

Designation

Name The value
Designation GOST Cyrillic 15кп
Designation GOST Latin 15kp
Transliteration 15kp
By chemical elements 15

Description

15kp steel is used: for the production of sheet metal, 1−2 mm 4−14 category, intended for cold forming; elements of pipe joints; fittings, plugs and other parts of kotloturbina operating at temperatures from -40 °C to +425 °C, after carburizing and cyanidation parts, which require high surface hardness and low strength of the core (fasteners, axles, levers and other parts); electric-welded pipes.

Note

The degree of deoxidation — KP.

Standards

Name Code Standards
Tape В34 GOST 10234-77, GOST 19851-74, TU 14-1-2568-78, TU 14-1-731-73
Bars and shapes В32 GOST 1050-88, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 10702-78, GOST 14955-77, GOST 1050-2013, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008
Fittings, components and parts for railway rolling stock Д55 GOST 11530-93
Sheets and strips В33 GOST 1577-93, GOST 4041-71, TU 14-1-4516-88
Classification, nomenclature and General rules В70 GOST 2771-81
Steel pipes and fittings to them В62 GOST 3262-75, GOST 10704-91, GOST 10705-80, GOST 10707-80, TU 14-3-1428-86, 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
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 103-2006, GOST 19903-90
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 19771-93, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90

Mechanical properties

sT|s0,2, MPa σU, MPa d5, % d y, % HB, MPa
Tape flatted average strength of 0.1-4.0 mm according to GOST 10234-77 in the state of delivery (indicated delivery)
- 390-540 - - - -
- 540-690 - - - -
- 690-830 - - - -
- ≤540 - ≥15 - -
Wire for cold heading as supplied by GOST 5663-79
- 470-620 - - ≥55 -
- ≤640 - - ≥50 -
Longitudinal electric-welded pipes (Dy=10-530 mm) in the delivery condition. Listed marsvolta base metal
≥206 ≥333 ≥24 - - -
Hot-rolled steel and hot rolled with special surface finish
- - - - - ≤143
Steel calibrated and calibrated with special surface finish
- ≥390 ≥8 - ≥50 ≤187
Strip g/K, normalized in the state of delivery
- ≥355 ≥29 - ≥55 -

Description mechanical marks

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
d Elongation after rupture
y The relative narrowing
HB Brinell hardness number

Physical characteristics

Temperature Е, HPa G, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m a, 10-6 1/°C С, J/(kg · °C)
0 201 83 7850 - - - -
20 201 - 7850 - - - -
100 192 80 7828 53 233 124 465
200 185 77 7794 53 296 132 486
300 172 74 7759 49 387 139 515
400 156 71 7724 46 487 144 532
500 - 68 7687 43 607 148 565
600 - 63 7648 39 753 151 586
700 - - 7611 36 904 153 620
800 - - 7599 32 1092 141 691
900 - - 7584 30 1140 132 691
1000 - - - - - 132 -
1200 - - - - - 133 -
1100 - - - - - - 708

A description of the physical symbols

Name Description
r Density
l Coefficient of thermal conductivity
R UD. the resistivity
С Specific heat

Technological properties

Name The value
Weldability Without restrictions.
Склонность к отпускной хрупкости Tend not.
Flock-sensitive sensitivity not sensitive.