Steel 14KHGS

Designation

Name	The value
Designation GOST Cyrillic	14ХГС
Designation GOST Latin	14XGC
Transliteration	14HGS
By chemical elements	14CrMnС

Description

14KHGS steel is used: for the manufacture of welded structures and litosfernyh, valve components; tubes for plants of chemical and petrochemical plants with nominal pressure PN=19.6−98 MPa (200−1000 kgf/cm²); pipes for pipes in installations for the production of ammonia with a working pressure of PN=31 MPa (320 kgf/cm²).

Note

Steel low alloy bromocinnamaldehyde. The degree of deoxidation — SP.
Steel 14KHGS provides strength grade sheet, universal broadband rental and roll-formed profiles KP 345 with plate thickness of up to 10 mm. without the use of additional hardening treatment.
In accordance with GOST 5520−79 with 01.01.1991 steel stamps 12K is not allowed to use in the newly created and upgraded technology.

Standards

Name	Code	Standards
Classification, nomenclature and General rules	В20	GOST 19281-89
Steel pipes and fittings to them	В62	GOST 20295-85, GOST 24950-81, TU 14-3Р-251-2007, TU 14-3-251-74, TU 14-3-433-75, TU 14-134-291-91
Sheets and strips	В23	GOST 82-70, GOST 5520-79, GOST 19903-74, GOST 19904-90, GOST 19282-73, GOST 19903-90
Bars and shapes	В22	GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 9234-74, GOST 11474-76
Processing of metals by pressure. Forgings	В03	OST 26-01-135-81
Sheets and strips	В33	TU 14-1-4431-88
Bars and shapes	В32	TU 14-136-367-2008

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	As	Al	Ti
TU 14-3Р-251-2007	0.11-0.16	≤0.04	≤0.035	0.9-1.3	0.5-0.8	0.4-0.7	≤0.3	Rest	≤0.3	≤0.008	≤0.08	≤0.05	≤0.03

Fe is the basis.
According to GOST 19282-73, it is allowed to modify steel with calcium and rare-earth elements from the calculation of the introduction of not more than 0.02% calcium and 0.05% rare-earth elements into the metal.
According to GOST 19281-89 and GOST 19282-73, it is allowed to add aluminum and titanium from the calculation of the mass fraction in the rolled aluminum - no more than 0.050%, titanium - no more than 0.030%.
According to GOST 5520-79, the mass fraction of arsenic can be up to 0.15% in the smelting of steel from the Kerch ore, while the mass fraction of phosphorus should not be more than 0.030%. At the request of the consumer, the mass fraction of sulfur should not exceed 0.025, 0.030 or 0.035%, and phosphorus 0.030 or 0.035%. When steel is smelted in electric furnaces, the mass fraction of nitrogen must be ≤ 0.012%.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄	d₁₀	y, %	KCU, kJ/m²	HB, MPa
Steel hot-rolled sheet in the delivery condition
2-3.9	-	-	≥490	-	≥18	-	-	-	-
5-9	-	≥350	≥500	-	≥22	-	-	-	-
Sheet 2-6, 10-12, 16, 18-22 categories, heat-treated, in the state of delivery GOST 5520-79
≤10	-	≥345	≥490	≥22	-	-	-	-	-
Sheet. Normalization
≥30	-	≥390	≥580	-	-	-	≥55	-	-
Strip with a thickness of 11 mm. Quenching in water from 900 °C to + Leave (exposure 2 hours)
-	100	≥1000	≥1270	-	-	≥8	-	-	≥390
Sheet. Normalization
10-20	-	≥420	≥580	-	-	≥22	≥47	-	-
Strip with a thickness of 11 mm. Quenching in water from 900 °C to + Leave (exposure 2 hours)
-	200	≥1060	≥1250	-	-	≥8	-	-	≥390
Sheet. Normalization
20-30	-	≥420	-	-	-	≥19	≥47	-	-
Strip with a thickness of 11 mm. Quenching in water from 900 °C to + Leave (exposure 2 hours)
-	300	≥980	≥1180	-	-	≥7	-	-	≥360
The plates and universal broadband in the state of delivery GOST 19282-73
5-10	-	≥345	≥490	≥22	-	-	-	-	-
Strip with a thickness of 11 mm. Quenching in water from 900 °C to + Leave (exposure 2 hours)
-	400	≥880	≥1020	-	-	≥7	-	-	≥310
-	500	≥770	≥860	-	-	≥10	-	-	-
Seamless hot deformed tubes for installations high pressure on the other 14-3-433-75 in the state of delivery of heat treated (longitudinal samples)
-	-	≥333	≥490	≥17	-	-	-	≥981	-
Strip with a thickness of 11 mm. Quenching in water from 900 °C to + Leave (exposure 2 hours)
-	600	≥670	≥730	-	-	≥12	-	-	≥210
Seamless hot deformed tubes for installations high pressure on the other 14-3-433-75 in the state of delivery of heat treated (longitudinal samples)
-	-	≥255	≥441	-	-	-	-	-	-
Strip with a thickness of 11 mm. Quenching in water from 900 °C to + Leave (exposure 2 hours)
-	700	≥490	≥590	-	-	≥19	-	-	≥180

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
d₁₀	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number

Technological properties

Name	The value
Weldability	RDS with no restrictions, ADS under flux and gas protection.
Склонность к отпускной хрупкости	Inclined.
The temperature of forging	Start - 1200 °C, the end - 850 °C.
Flock-sensitive sensitivity	not sensitive.