15GS Structural Steel Material

Designation

Name	The value
Designation GOST Cyrillic	15ГС
Designation GOST Latin	15GC
Transliteration	15GS
By chemical elements	15MnС

Description

15GS steel and specification control

15GS appears in legacy standards for plate, long products and pipe billets used in power-equipment and piping applications. The designation alone does not establish a U.S. equivalent, pressure rating or suitability for boiler, nuclear or elevated-temperature service. The buyer must identify the governing material, component and design standards, required edition and acceptance criteria.

Forms, dimensions and quality requirements

Requests may cover plate, bar, pipe billet, tube blank or purchaser-defined cut parts. State thickness or diameter, width, length, tolerances, surface, delivery condition and quantity. For pressure-related service, include design temperature and pressure, heat treatment, required tensile and impact properties, test temperature, inspection, traceability and material-certificate requirements. Evek LLC confirms the feasible product route and documentation only after reviewing the complete specification.

Application descriptions are not design approval or certification. The governing code, purchase specification and material certificate control the delivered product.

Information needed for a quote

Send 15GS, the governing standard, product form, dimensions, condition, service temperature, quantity, tests, certificate needs and U.S. delivery ZIP code.

Stock, production route, origin, minimum quantity, compliance, certification, price and final delivery are confirmed during quotation. Product descriptions and reference data are not stock or suitability guarantees.

Request a U.S. quote

Evek LLC serves buyers throughout the United States. Typical delivery is 2–3 weeks, subject to the exact material, specification, dimensions, quantity and availability. Send your requirement to Evek LLC with the U.S. delivery ZIP code.

Standards

Name	Code	Standards
Processing of metals by pressure. Forgings	В03	GOST 8479-70, OST 108.030.113-87, OST 26-01-135-81, TU 108.1267-84, TU 108.11.653-82
Welding and cutting metals. Soldering, riveting	В05	OST 24.125.02-89
Steel pipes and fittings to them	В62	OST 24.125.30-89, TU 14-3-420-75, TU 14-3-463-2005, TU 14-3-460-2009, TU 1301-039-00212179-2010, TU 1310-030-00212179-2007, TU 108-874-2012, TU 14-3Р-55-2001, TU 14-3-460-2003
Bars and shapes	В32	TU 108-771-84, TU 108.772-85, TU 14-1-1529-2003
Sheets and strips	В33	TU 108.1268-84
Blanks. Of the workpiece. Slabs	В31	TU 108.1398-86, TU 108-938-80, TU 14-1-1787-76, TU 14-1-2560-78, TU 14-1-4992-91, TU 24-11.006-89

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Mo
TU 14-3-460-2003	0.12-0.18	≤0.025	≤0.025	0.9-1.3	≤0.3	0.7-1	≤0.3	Rest	≤0.3	-
TU 108-874-2012	0.13-0.17	≤0.025	≤0.03	0.9-1.3	≤0.3	0.7-1	≤0.3	Rest	≤0.3	≤0.3
TU 14-3Р-55-2001	0.12-0.18	≤0.025	≤0.035	0.9-1.3	≤0.3	0.7-1	≤0.3	Rest	≤0.3	-
TU 1301-039-00212179-2010	0.12-0.18	≤0.025	≤0.035	0.9-1.3	≤0.3	0.7-1	≤0.3	Rest	≤0.3	≤0.15

Fe is the basis.
According to TU 108.1268-84, the technological addition of rare earth metals is allowed up to 0.20% by calculation.
According to TU 14-1-1529-2003 and TU 14-3-460-2003 for steel produced by scrap process or from cuprous ores, the mass fraction of residual copper and nickel is allowed up to 0.30% of each. A technological addition of rare earth elements is allowed to improve the quality of the metal.
According to TU 14-3R-55-2001, the content of nickel and chromium is allowed to not exceed 0.40% of each. The presence of rare-earth elements introduced as technological additives is allowed.
According to TU 1301-039-00212179-2010 the chemical composition is given for steel grade 15GS-III. The content of each impurity element, not regulated by the table, is allowed up to 0.050%.
According to TU 108-874-2012 the chemical composition is given for steel grade 15GS. The presence of rare-earth elements in steel is not a defective feature. Permissible deviations in chemical composition: carbon ± 0.020%, silicon ± 0.050%, manganese ± 0.10%, chromium ± 0.050%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d	y, %	KCU, kJ/m²
Sheet metal 25-140 mm. Normalization at 900-930 °C, air cooling + Vacation at 650-680 °C, air cooling (the average data)
-	≥237	-	-	-	-	-
Pipe. Normalization at 900 - 930°C, air cooling
-	-	≥500	16-18	-	40-45	-
Tubular billet + hot deformed Tubes (DH=57-465 mm) TU 14-3-460-2003. Normalization at 900-930 °C, air cooling
20-25	≥295	490-640	≥16	-	≥40	≥490
Sheet metal 25-140 mm. Normalization at 900-930 °C, air cooling + Vacation at 650-680 °C, air cooling (the average data)
-	≥213	-	-	-	-	-
Tubular billet + hot deformed Tubes (DH=57-465 mm) TU 14-3-460-2003. Normalization at 900-930 °C, air cooling
20-25	≥295	490-640	≥18	-	≥45	≥590
Sheet metal 25-140 mm. Normalization at 900-930 °C, air cooling + Vacation at 650-680 °C, air cooling (the average data)
-	≥202	-	-	-	-	-
Seamless pipes for steam boilers and pipelines according to TU 14-3P-55-2001. Normalization at 900-930 °C, air cooling
-	≥294	≥490	≥16	-	≥40	≥490
Sheet metal 25-140 mm. Normalization at 900-930 °C, air cooling + Vacation at 650-680 °C, air cooling (the average data)
-	≥249	-	-	-	-	-
Seamless pipes for steam boilers and pipelines according to TU 14-3P-55-2001. Normalization at 900-930 °C, air cooling
-	≥294	≥490	≥18	-	≥45	≥590
Sheet metal 25-140 mm. Normalization at 900-930 °C, air cooling + Vacation at 650-680 °C, air cooling (the average data)
-	≥235	-	-	-	-	-
Pipe seamless steel 15ГС-ø in delivery condition on the other 1301-039-00212179-2010. Normalization at 900-930 °C, air cooling (allowed after normalization the holidays at 630-670 °C)
-	≥295	490-610	≥16	-	≥40	≥590
Sheet metal 25-140 mm. Normalization at 900-930 °C, air cooling + Vacation at 650-680 °C, air cooling (the average data)
-	≥196	-	-	-	-	-
Pipe tsentrobezhnolityh, heat-treated on the other 108-874-2012
-	≥274	470-617	-	≥20	≥40	≥490
Sheet metal 25-140 mm. Normalization at 900-930 °C, air cooling + Vacation at 650-680 °C, air cooling (the average data)
-	≥190	-	-	-	-	-
-	≥178	-	-	-	-	-
Seamless pipes for steam boilers and pipelines according to TU 14-3P-55-2001. Normalization at 900-930 °C, air cooling
-	≥245	-	-	-	-	-
-	≥167	-	-	-	-	-
-	≥127	-	-	-	-	-

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
KCU	Toughness

Technological properties

Name	The value
Weldability	Without restrictions.
Склонность к отпускной хрупкости	Tend not.
Flock-sensitive sensitivity	not sensitive.
Macrostructure and pollution	In the macrostructure of the pipe on the other 108-874-2012 should not be cracked, placenow and bundles. Allowed separate slag and sand inclusions, and a gas sink maximum linear size up to 1 mm. increased Local travelmasti metal 1-5 points scale rejection of the sign is not. Contamination of the metal pipes, non-metallic inclusions should not exceed the arithmetic mean score of the sulphides 2.5 points, according to the oxides - 3.5 points, silicates - 4 points scale.
Microstructure	On the other 108-874-2012 the size of ferritic grains should be no larger than 7 points according to GOST 5639.
Particularities of production of goods	Pipe tsentrobezhnolityh on the other 108-874-2012 are delivered in heat treated condition. Tubes are homogenized and anti-flake annealing, the modes of which shall be agreed with TSNIITMASH. The mode of heat treatment: Normalization at 930-960 °C. be conducted after normalization, tempering at 630-670 °C.