Steel 16ГНМА

Designation

Name	The value
Designation GOST Cyrillic	16ГНМА
Designation GOST Latin	16GHMA
Transliteration	16GNMA
By chemical elements	16MnНMo

Description

16ГНМА steel is used: for the manufacture of parts such as bottoms, collar flanges, fittings, rings, tubes, tees, drums of high-pressure boilers and parts of rectangular shape for power equipment and pipelines with an absolute pressure of more than 3.9 MPa, thermal power plants.

Note

Carbon structural steel high quality.

Standards

Name	Code	Standards
Processing of metals by pressure. Forgings	В03	OST 108.030.113-87
Sheets and strips	В33	OST 108.030.118-78

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Mo
OST 108.030.118-78	0.13-0.18	≤0.02	≤0.02	0.8-1.1	≤0.3	0.17-0.37	1-1.3	Rest	≤0.2	0.4-0.55

Fe is the basis.
According to OST 108.030.118-78 the casting composition of steel grade 16GNMA is given. When smelting steel allowed deviations in the chemical composition: nickel, silicon, chromium and manganese ± 0.050% each. When steel is smelted as a technological additive, ferrovanadium is added at 0.020-0.030% by calculation. In the finished rolled metal under the control chemical analysis of the metal, deviations from the chemical composition standards are allowed in accordance with GOST 19281. The manufacturer guarantees the arsenic content (As) not more than 0.080% and nitrogen (N) not more than 0.0080%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²
Rolled sheet with a thickness of 115 mm for OST 108.030.118-78. The transverse samples. Normalization at 930±10 °C (extract 1 min per 1 mm thickness), cooling for extended hearth or air + Vacation at 630-670 °C (exposure 6 minutes per 1 mm thickness), cooling with the oven up to 400 °C at a speed of not more than 50°C/hour, then air cooling
???	-	-	-	-	≥392
20	323-510	≥500	≥20	≥50	≥785
350	≥255	≥440	-	-	-
20	-	-	-	-	≥392

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
y	The relative narrowing
KCU	Toughness

Technological properties

Name	The value
Macrostructure and pollution	The macrostructure of the steel on the etched templeto visual inspection should not have delamination, placenow, shrinkage looseness. Allowed separate volosovichi and non-metallic inclusions is no longer than 15 mm. the Macrostructure of the investigated template should be compared with the sulfur prints, thus, discovered on microtemplate strokes of any length, coinciding with liquate-services clusters in sulfur print, the discontinuities (layers, flocs, golosovanie) are not considered. The degree of phase separation homogeneity and density of the metal are characterized by sulfur print, which should correspond to the points 1-4 of sulfur prints made of carbon steel and alloy steel approved Intimacies.