Steel St3ps (ВСт3пс)

Designation

Name	The value
Designation GOST Cyrillic	Ст3пс
Designation GOST Latin	Ct3pc
Transliteration	St3ps
By chemical elements	3

Name	The value
Designation GOST Cyrillic	ВСт3пс
Designation GOST Latin	BCt3pc
Transliteration	VSt3ps
By chemical elements	3

Description

St3ps steel is used: for the production of shaped and sheet rolled (5th category) with a thickness of 10 mm. used for load-bearing elements of welded structures operating at variable loads at temperatures from -40 °C to +425 °C; rent from 10 to 25 mm. — bearing elements of welded structures operating at temperatures from — 40 °C to +425°C under the condition of supply with guaranteed weldability; casting parts of pipe fittings; forgings seniam to 300 mm. strength classes KP 175, KP 195; expanded metal sheets; hot rolled pan and odnoselchanka profiles for agricultural machinery; profile housing final drive of the tractor; hot rolled profiles for the production of rims for agricultural machines; electric-welded pipes for the manufacture of parts and structures in motovelotehnika; two-headed rails, t-type P5, is designed for ground and suspended tracks; steel bent closed welded square and rectangular sections, intended for use in agricultural machinery, tractor and other sectors of the economy; hot-rolled steel sections sheet piling, designed for cellular structures and impervious curtain; crutches accuracy class, designed for fastening of rails to wooden sleepers and bars.

Note

The degree of deoxidation — PS.

Standards

Name	Code	Standards
Tape	В34	GOST 19851-74
Steel pipes and fittings to them	В62	GOST 3262-75, GOST 8696-74, GOST 10704-91, GOST 10705-80, GOST 10706-76, GOST 10707-80, GOST 12132-66, GOST 20295-85, GOST 24950-81, TU 14-3-1160-83, TU 14-3-1428-86, TU 1380-001-08620133-05, TU 14-3Р-56-2001, TU 14-3-377-99, TU 1373-013-02949352-2003
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 4781-85, GOST 5267.0-90, 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 10884-94, GOST 11474-76, GOST 12492.1-90, GOST 12492.2-90, GOST 12492.4-90, GOST 12492.5-90, GOST 12492.14-90, GOST 19240-73, GOST 19425-74, GOST 19771-93, GOST 19772-93, GOST 25577-83, GOST 26020-83, 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 14-1-3094-80, TU 14-2-341-78, TU 14-2-853-89, TU 14-2-949-91, TU 14-1-5282-94, HUNDRED АСЧМ 20-93, TU 14-1-5283-94, TU 14-105-568-93, TU 14-1-5254-94
Rails. Lining. Lining. Crutches	В42	GOST 5812-82, GOST 8142-89, GOST 16277-93
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 36.26.11-5-89, TU 14-1-3023-80
Processing of metals by pressure. Forgings	В03	GOST 8479-70, ST ЦКБА 010-2004
Welding and cutting metals. Soldering, riveting	В05	OST 26-260.453-92
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 14-1-3579-83, TU 14-1-4431-88
Bars and shapes	В32	TU 14-105-454-86, TU 14-2-849-89, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008
Test methods. Packing. Marking	В29	TU 14-106-485-99
Low carbon steel wire	В71	TU 14-4-1813-97

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	As
GOST 380-2005	0.14-0.22	≤0.05	≤0.04	0.4-0.65	≤0.3	0.05-0.15	≤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	y, %	KCU, kJ/m²	HB, MPa
Longitudinal electric-welded pipes (Dy=10-530 mm) in the delivery condition. Listed marsvolta base metal
-	≥225	≥372	≥22	-	-	-	-
Forgings. Normalization
100-300	≥175	≥355	≥24	-	≥50	≥590	101-143
100	≥175	≥355	≥28	-	≥55	≥690	101-143
100-300	≥195	≥390	≥23	-	≥50	≥540	111-156
100	≥195	≥390	≥26	-	≥55	≥590	111-156
The hot rolled plate, long products and fittings as supplied
≤20	≥245	370-480	≥26	-	-	-	-
20-40	≥235	370-480	≥25	-	-	-	-
40-100	≥225	370-480	≥23	-	-	-	-
100	≥205	370-480	≥23	-	-	-	-
Blank pieces of pipe fittings. Extract at 900-950 °C (2.5-4.0 hours depending on the thickness and weight of the workpiece) annealing in air
300	≥175	≥355	≥24	-	≥50	≥590	101-143
Hot-rolled sheet in the state of delivery (specified group strength)
≤2	≥235	360-530	-	≥20	-	-	-
2-3.9	≥235	360-530	-	≥22	-	-	-
≤2	≥255	370-530	-	≥20	-	-	-
2-3.9	≥255	370-530	-	≥22	-	-	-
Cold-rolled sheet in the state of delivery (specified group strength)
≤2	≥235	360-530	-	≥22	-	-	-
2-3.9	≥235	360-530	-	≥24	-	-	-
≤2	≥255	370-530	-	≥22	-	-	-
2-3.9	≥255	370-530	-	≥24	-	-	-

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
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number

Physical characteristics

Temperature	Е, HPa
700	153

A description of the physical symbols

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

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 when blower SB 124 and HB=400 MPa Kn TV.SPL.=1,8 Kn b.St.=1,6.