MN19 alloy (cupronickel)

Designation

Name	The value
Designation GOST Cyrillic	МН19
Designation GOST Latin	MH19
Transliteration	MN19
By chemical elements	CuNi19

Name	The value
Designation GOST Cyrillic	Мельхиор
Designation GOST Latin	Melxiop
Transliteration	Melhior
By chemical elements	Cuельхиор

Description

Alloy MN19 is used: for the manufacture of semi-finished products (strips, sheets, rods and tubes); as planirovochnye material for medical instruments; fine mechanics parts; parts of vacuum devices.

Standards

Name	Code	Standards
Tape	В54	GOST 1018-77, GOST 5187-2003, OST 4.021.085-92, TU 48-0810-206-93, TU 48-0820-387-89, TU 48-21-624-79
Non-ferrous metals, including rare, and their alloys	В51	GOST 28873-90, GOST 492-2006, OST 4.021.009-92
Sheets and strips	В53	GOST 5063-73
Bars	В55	TU 48-21-191-72, TU 11-84

Chemical composition

Standard	C	S	P	Mn	Si	Ni	Fe	Cu	As	Zn	Sb	Pb	Bi	O	Mg	H	Ni+Co
TU 48-21-191-72	≤0.05	≤0.01	≤0.01	≤0.3	≤0.15	-	≤0.5	Rest	≤0.01	≤0.3	≤0.005	≤0.005	≤0.002	-	≤0.05	-	18-20
TU 11-84	≤0.05	≤0.005	≤0.01	≤0.001	≤0.01	18-20	≤0.07	Rest	≤0.001	-	-	≤0.001	≤0.001	≤0.003	≤0.005	≤0.0006	-
GOST 1018-77	≤0.05	≤0.01	≤0.01	≤0.3	≤0.05	-	≤0.3	Rest	≤0.01	≤0.3	≤0.005	≤0.005	≤0.002	-	≤0.05	-	18-20

Cu is the basis.
According to GOST 492-2006, the total mass fraction of impurities is ≤ 1.50%. In the alloy, the mass fraction of cobalt ≤ 0.50% is allowed due to the mass fraction of Ni + Co, which is not taken into account in the total amount of impurities. The mass fraction of cobalt exceeding 0.50% is taken into account in the total amount of impurities. In the alloy, in agreement with the consumer, it is possible to determine the mass fraction of tin. In the alloy, the mass fraction of lead is allowed to be ≤ 0.050%. In agreement with the consumer, the mass fraction of phosphorus is allowed to be ≤ 0.020%. In the MH19 nickel, which is used for making coins, an increase in the content of the manganese or iron mass fraction is possible, more than indicated in the table, but the sum of them should not exceed 1.30%. The following impurity content is established in MN19, used for the production of special-purpose tapes: Mn ≤ 0.010%, Mg ≤ 0.010%, Si≤ 0.15%, Fe≤ 0.30%, total impurities ≤ 0.60%.
According to TU 11-84, Hе0.021.153 The chemical composition is given for an alloy of the grade MN19-VP (Melchior). The total amount of all impurities in the alloy is not more than 0.20%.

Mechanical properties

Section, mm	σ_U, MPa	d₅, %	d	HB, MPa
Cold-rolled steel strip as supplied by GOST 1018-77 (samples transverse)
	290-370	-	≥32	-
Cold-rolled steel strip as supplied by GOST 5187-2003 (samples transverse)
≥0.5	≥290	-	≥25	-
0.5	≥290	-	≥22	-
≥0.5	≥390	-	≥2.5	-
0.5	≥390	-	-	-
Cold-rolled steel strip as supplied by OST 4.021.085-92 (samples transverse)
0.1-1	≥390	-	≥2.5	-
Cold-rolled strip in the delivery state according to GOST 5063-73 (samples transverse)
	≥290	-	≥30	-
	≥390	-	≥3	-
Bars drawn and cold-rolled steel in the delivery state THAT 48-21-191-72
-	≥294	-	-	-
-	≥392	-	-	-
Rolled steel in delivery condition (longitudinal samples)
	300-400	35-40	-	≥70
	500-600	3-5	-	≥117

Description mechanical marks

Name	Description
σ_U	Limit short-term strength
d₅	Elongation after rupture
d	Elongation after rupture
HB	Brinell hardness number

Physical characteristics

Temperature	r, kg/m³
20	8900

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
l	Coefficient of thermal conductivity
R	UD. the resistivity
С	Specific heat

Technological properties

Name	The value
Weldability	Well weldable alloy.
Pressure treatment	Alloy poorly deformable in the cold state.
Macrostructure and pollution	In pudah alloy MN19-VP on the other 11-84 Яе0.021.153 THAT allowed the presence of non-metallic inclusions is not more than 3 points according to GOST 1778.
Corrosion resistance	Corrosion resistant.