Steel 15 (15A)

Designation

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

Name	The value
Designation GOST Cyrillic	15А
Designation GOST Latin	15A
Transliteration	15A
By chemical elements	15

Description

Steel 15 used: for the manufacture of sheet metal, 1−2 mm 4−14 category, intended for cold forming; bolts, screws, hooks and other parts, which are requirements of high plasticity and working at temperatures from -40 °C to +450 °C; after HTO (chemical heat treatment) — levers, Cams, fasteners, and other parts, which are requirements of high surface hardness and low strength of the core; welded pipes; welded cold-deformed pipes for cardan shafts of automobiles, tractors and machines; bardney wire designed for weaving bird.

Note

The degree of deoxidation — SP.

Standards

Name	Code	Standards
Bars and shapes	В32	GOST 1050-88, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 10702-78, GOST 14955-77, TU 14-1-5414-2001, TU 14-1-2118-77, TU 14-130-49-90, TU 14-1-3514-83, TU 14-1-3651-83, TU 14-1-3697-84, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008
Sheets and strips	В33	GOST 1577-93, GOST 4041-71, TU 14-1-3579-83, TU 14-1-450-72, TU 14-1-4516-88
Tape	В34	GOST 2284-79, GOST 10234-77, GOST 19851-74
Steel pipes and fittings to them	В62	GOST 3262-75, GOST 5005-82, GOST 10704-91, GOST 10705-80, GOST 10707-80, GOST 20295-85, GOST 24950-81, 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 5437-85, GOST 5663-79
Sheets and strips	В23	GOST 82-70, GOST 14918-80, GOST 16523-97, GOST 16523-89, GOST 16523-70, GOST 103-2006, GOST 19903-90, TU 14-1-1934-76, TU 14-1-4632-93
Bars and shapes	В22	GOST 8239-89, GOST 8240-97, GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 8319.0-75, GOST 8509-93, GOST 8510-86, GOST 9234-74, GOST 10551-75, GOST 11474-76, GOST 30245-2003, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006, OST 5.9087-84
Processing of metals by pressure. Forgings	В03	GOST 8479-70, OST 5Р.9125-84, ST ЦКБА 010-2004
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-281-72, TU 14-1-4944-90

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄	d	d₁₀	y, %	KCU, kJ/m²	HB, MPa	HRB
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	-	320-440	≥30	-	-	≥26	-	-	≤121	≤68
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
	≥225	≥372	≥22	-	-	-	-	-	-	-
Steel calibrated and calibrated with special surface finish
-	-	≥440	≥8	-	-	-	≥45	-	≤197	-
-	-	360-470	-	-	-	-	≥55	-	≤149	-
-	-	320-420	-	-	-	-	≥55	-	≤149	-
Electric-welded cold-deformed pipes for cardan shafts according to GOST 5005-82
	≥430	≥510	≥8	-	-	-	-	-	-	-
Tape flatted average strength of 0.1-4.0 mm according to GOST 10234-77 (include delivery)
-	-	490-830	-	-	-	-	-	-	-	-
-	-	390-540	-	-	-	-	-	-	-	-
-	-	540-690	-	-	-	-	-	-	-	-
-	-	690-830	-	-	-	-	-	-	-	-
-	-	≤540	-	-	≥15	-	-	-	-	-
Reed wire can supply according to GOST 5437-85
2.3-3	-	440-590	-	-	-	-	-	-	-	-
3.1-8.5	-	390-540	-	-	-	-	-	-	-	-
Cold-rolled steel strip of 0.1-4.0 mm in the delivery state according to GOST 2284-79
-	-	440-780	-	-	-	-	-	-	-	-
-	-	310-490	-	≥20	-	-	-	-	-	-
The normalized or hot rolled strip
	-	≥370	≥27	-	-	-	≥55	-	-	-
Steel, hot-rolled, forged, calibrated and silverfish 2nd category after normalization
	-	≥375	≥27	-	-	-	≥55	-	-	-
Steel grooved 5-th category after annealing or high holidays
	-	≥345	≥23	-	-	-	≥55	-	-	-
Forgings. Normalizatsiya
100-300	≥175	≥355	≥24	-	-	-	≥50	≥579	101-143	-
100	≥175	≥355	≥28	-	-	-	≥55	≥628	101-143	-
100	≥195	≥390	≥26	-	-	-	≥55	≥579	111-156	-
Hot-rolled sheet in the delivery condition. Group strength К330В
≤2	-	330-460	-	≥23	-	-	-	-	-	≤73
Cold-rolled sheet in the delivery condition. Group strength К330В
≤2	-	330-460	-	≥24	-	-	-	-	-	≤73
2-3.9	-	330-460	-	≥25	-	-	-	-	-	≤73
The rod 45 mm. Normalization at 900-920 °C + Vacation at 650-660 °C, air cooling
-	≥215	≥420	≥33	-	-	-	≥70	-	-	-
-	≥205	≥400	≥24	-	-	-	≥68	-	-	-
-	≥170	≥420	≥24	-	-	-	≥63	-	-	-
-	≥150	≥380	≥33	-	-	-	≥71	-	-	-
-	≥150	≥235	≥36	-	-	-	≥75	-	-	-

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

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	53	-	-	-
20	201	-	7850	53	-	-	-
100	192	78	7828	53	233	124	465
200	185	77	7794	53	296	132	486
300	176	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
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

Technological properties

Name	The value
Weldability	Without limitation, except HTO parts; welding methods: SMAW, submerged arc ADS and gateway protection of the CCC.
Склонность к отпускной хрупкости	Tend not.
The temperature of forging	Beginning - 1300 °C, end - 700 °C. air Cooling.
Flock-sensitive sensitivity	not sensitive.
Machinability	In hot-rolled state when HB 143 Kn TV.SPL.=1,8.