Alloy ХН46Б (ЭП350; 0Х20Н46Б)

Designation

Name	The value
Name	The value
Designation GOST Cyrillic	ХН46Б
Designation GOST Latin	XH46B
Transliteration	HN46B
By chemical elements	CrNi46Be

Name	The value
Name	The value
Designation GOST Cyrillic	ЭП350
Designation GOST Latin	EP350
Transliteration	EhP350
By chemical elements	-

Name	The value
Name	The value
Designation GOST Cyrillic	0Х20Н46Б
Designation GOST Latin	0X20H46B
Transliteration	0H20N46B
By chemical elements	0Cr20Ni46Be

Description

Alloy ХН46Б used: for the manufacture of pipe systems for steam generators; water systems and steam heating in contact with water with high content of ions of chlorine and oxygen; a tube blank 180−190 mm ø for the production of thin-walled electropolishing pipes.

Standards

Name	Code	Standards
Name	Code	Standards
Bars and shapes	В32	TU 14-1-516-73
Blanks. Of the workpiece. Slabs	В31	TU 14-1-693-73
Steel pipes and fittings to them	В62	TU 14-3-1202-83, TU 14-3-145-73

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Nb
Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Nb
TU 14-1-693-73	≤0.06	≤0.02	≤0.025	≤0.8	19-21	≤0.5	44-48	Rest	0.8-1.2

Ni is the basis.
According to TU 14-1-693-73, the chemical composition is given for an alloy of grade ХН46Б (ЭП350). Deviations in chemical composition are allowed: carbon +0.010%, niobium ± 0.10%, chromium ± 0.50%, manganese +0.20%, silicon +0.10%.
According to TU 14-1-516-73, the chemical composition is given for an alloy of grade ХН46Б (ЭП350).

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %
Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %
Tubular billet on the other 14-1-693-73. Quenching in water from 1050-1080 °C
	≥206	≥540	≥30
	-	≥147	-

Description mechanical marks

Name	Description
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

Technological properties

Name	The value
Name	The value
Weldability	Limited weldable alloy. For welding apply welding wire of grade SV-03Х20Н45Г6М6Б (ЭП953).
Macrostructure and pollution	Macrostructure of steel billets on the other 14-1-693-73 on cross etched templeto selected from the head part of the ingot should not be visible without using the magnifying devices of the bubbles, captivity, cracks, fistulas, inclusions, podsadecki segregation. The degree of development of the Central porosity, point heterogeneity and phase separation of the square should not exceed 1 score for each parameter for the alloy of electroslag remelting and 2 points for alloy smelting open. Contamination of alloy, non-metallic inclusions on the average score for the alloy ESR shall not exceed: plastic silicates and sulphides 1.0 points, oxides of stroke and non-deformable silicates (globular) 1.5 points, oxides of point 2.0 points, silicates fragile-2.5 points; for open alloy smelting should not exceed: plastic silicates and sulphides 1.5 points, oxides of stroke 2.0 points, oxides point, silicates fragile 2.5 points, silicates, non-deformed (globular) 3.5 points.
Corrosion resistance	The workpiece must be able to withstand the test of intercrystalline corrosion according to the method of AM - GOST 6032 subgroup And the samples quenched in water from a temperature 1050-1080 °C With provoking heated for 1 hour to 650 °C.