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

s_T\|s_0,2, MPa	σ_U, 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
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	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.