Steel St2kp (ВСт2кп)

Designation

Name	The value
Designation GOST Cyrillic	Ст2кп
Designation GOST Latin	Ct2kp
Transliteration	St2kp
By chemical elements	2

Name	The value
Designation GOST Cyrillic	ВСт2кп
Designation GOST Latin	BCt2kp
Transliteration	VSt2kp
By chemical elements	2

Description

St2kp steel is used: for the manufacture of non-critical parts requiring high ductility or deep drawing; malonarushennye elements of welded structures operating at constant loads and with positive temperatures; electric-welded pipes for the manufacture of parts and structures in motovelotehnika; pipes for shipbuilding; hot-rolled steel sheets with one-sided rhombic and lenticular corrugated; two-headed rails, t-type P5, is designed for ground and suspended tracks.

Note

The degree of deoxidation — KP.

Standards

Name	Code	Standards
Tape	В34	GOST 19851-74
Steel pipes and fittings to them	В62	GOST 3262-75, GOST 8639-82, GOST 8642-68, GOST 8644-68, GOST 8645-68, GOST 8646-68, GOST 8696-74, GOST 10704-91, GOST 10705-80, GOST 10706-76, GOST 10707-80, GOST 12132-66, GOST 13663-86, GOST 13664-68, OST 5.6065-74, OST 5.9162-73, TU 14-3-1160-83, TU 14-3-1428-86, TU 14-3Р-56-2001, TU 1373-022-05757850-08, TU 1373-013-02949352-2003
Low carbon steel wire	В71	GOST 3282-74
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 8509-93, GOST 8510-86, GOST 9234-74, GOST 10551-75, GOST 11474-76, GOST 19240-73, GOST 19425-74, GOST 19771-93, GOST 19772-93, GOST 30565-98, GOST 535-2005, GOST 30136-95, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006, OST 5.9086-85, OST 5.9087-84, TU 14-2-341-78, TU 14-1-5283-94
Sheets and strips	В23	GOST 82-70, GOST 8568-77, 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 14-1-521-73, STP М324-90
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-4944-90
Sheets and strips	В33	TU 14-1-3579-83, TU 14-1-4431-88
Bars and shapes	В32	TU 14-11-245-88, TU 14-136-367-2008

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	As
GOST 380-2005	0.09-0.15	≤0.05	≤0.04	0.25-0.5	≤0.3	≤0.05	≤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%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄
Longitudinal electric-welded pipes (Dy=10-530 mm) in the delivery condition. Listed marsvolta base metal
-	≥206	≥333	≥24	-
Pipe electric-welded profile in the delivery state according to GOST 13663-86 (samples)
-	-	≥353	≥10	-
-	≥206	≥333	≥24	-
Hot-rolled sheet in the delivery condition. Group strength ОК300В
≤2	≥215	300-480	-	≥21
2-3.9	≥215	300-480	-	≥23
Cold-rolled sheet in the delivery condition. Group strength ОК300В
≤2	≥215	300-480	-	≥24
2-3.9	≥215	300-480	-	≥26
The hot rolled plate, long products and fittings as supplied
≤20	≥215	325-410	≥33	-
20-40	≥205	325-410	≥32	-
40-100	≥195	325-410	≥30	-
100	≥185	325-410	≥30	-

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
d₄	Elongation after rupture

Technological properties

Name	The value
Weldability	Welded without restriction; welding methods: SMAW, ADS submerged arc and gas protection electroslag welding, the CCC. For thickness of more than 36 mm recommended heating and subsequent heat treatment.
Склонность к отпускной хрупкости	tend not
The temperature of forging	Beginning - 1300 °C, the end - 750 °C. air Cooling.
Flock-sensitive sensitivity	not sensitive
Machinability	In the hot rolled condition with a HB of 137 Kn TV.SPL.=2.0 Kn b.St.=1.6