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Alloy CR20NI80

Designation

Name The value
Designation GOST Cyrillic Х20Н80
Designation GOST Latin X20H80
Transliteration H20N80
The chemical elements Cr20Ni80

Description

Alloy CR20NI80 used: for the manufacture of critical parts vnutrivakuumnyh appliances; connectors in electronic devices; nepretsizionnyh resistors; cold drawn wire micron size and resistance elements; powder used in the production of goods and permeable laminated and sintered porous tape, filters for the filtration of lubricating oils, fuels, alkalis, air and other gases and fluids, as well as for the manufacture of plamegasiteli; porous coolers; powder used for the manufacture of sealing inserts of the turbines of the rolled strip 0.1−1.0 mm for the manufacture of heating elements and resistance elements; crimped ribbon 0,05 ± 0,005 x 0,25 ± 0,05 special purpose for the manufacture of braided wiring harness; powders used as a plasma protective and strengthening coatings in the aviation industry; the thinnest wire (0,009−0,400 mm) for the production of resistive elements; wire and strip for industrial electrical apparatus heating effect, rheostats, elektrosoprotivleniya, micro wire, and appliances.

Note

Alloy with specified temperature coefficient of electrical resistance.
The powder of alloy CR20NI80 made by the joint recovery of a mixture of metal oxides and metal powders with calcium hydride.

Standards

Name Code Standards
Classification, nomenclature and general norms В30 GOST 10994-74
Tapes В34 GOST 12766.5-90, GOST 12766-67, TU 14-1-1388-75, TU 14-1-1714-76, TU 14-1-3223-81, TU 14-1-4983-91, TU 14-4-694-76
Solid alloys, metal-ceramic products and powders, metal В56 GOST 13084-88, TU 14-127-232-85
Steel alloy wire В73 GOST 8803-89, OST 88.0.022.202-74, TU 14-4-127-72, TU 14-4-1285-84, TU 14-1-3225-81, TU 14-131-820-90
Wire of non-ferrous metals and their alloys В74 OST 4Г 0.022.004-69, OST 4Г 0.022.005-69
Bulls. Blanks. Slabs В31 TU 14-1-1690-76, TU 14-1-3904-84, TU 14-1-4624-89
Steel wire medium- and high-carbon В72 TU 14-1-3224-81
Sectional and shaped rolling В32 TU 14-1-3744-84, TU 14-11-245-88, TU 14-1-1271-75

Chemical composition

Standard C S P Mn Cr Si Ni Fe Al Ti Ca O Zr
TU 14-1-4624-89 ≤0.05 ≤0.007 ≤0.008 ≤0.3 20.5-22.5 0.5-0.8 The rest ≤1.5 ≤0.02 ≤0.05 - - -
TU 14-1-3225-81 ≤0.1 ≤0.02 ≤0.03 ≤0.7 20-23 0.9-1.5 The rest ≤1.5 ≤0.2 ≤0.3 - - -
GOST 13084-88 ≤0.06 ≤0.01 - ≤0.05 18-22 ≤0.1 The rest ≤0.3 - ≤0.08 ≤0.2 ≤0.3 -
GOST 12766-67 ≤0.15 ≤0.02 ≤0.03 ≤0.7 20-23 0.4-1.5 The rest ≤1.5 ≤0.2 ≤0.3 - - ≤0.5
Ni is the basis.
According to TU 14-1-4624-89, the chemical composition is given for the alloy grade Kh20N80-VP. The alloy controls the oxygen and nitrogen content - the results are recorded in the certificate.
In accordance with GOST 10994-74 and TU 14-1-3225-81, the chemical composition is given for the alloy grade Kh20N80. The presence of residual rare-earth elements, as well as barium, calcium, magnesium is not a defective feature. The alloy grade X20N80-VI is characterized by mass fractions of the following elements: carbon ≤ 0.050%, sulfur and phosphorus ≤ 0.010%, manganese ≤ 0.30%, titanium ≤ 0.050%, aluminum ≤ 0.15%, silicon 0.40-1, 00%. In accordance with GOST 10994-74 for alloy grade X20N80-VI, deoxidation by rare earth elements and zirconium is not allowed.
According to GOST 13084-88 the chemical composition is given for powder grade ПХ20Н80.
According to GOST 12766-67, the chemical composition is given for the alloy grade Kh20N80. The presence in the alloy of residual rare-earth elements, as well as barium and calcium, is not a defective feature. In the alloy intended for the production of micron-sized wires, the aluminum content should be no more than 0.150% and titanium not more than 0.050%. In the glory intended for the manufacture of wire with a diameter of 0.09 mm or less, the carbon content is not more than 0.060%. In the alloy intended for the manufacture of wire for enameling, the titanium content should not be more than 0.10%.

Mechanical characteristics

Section, mm σB, MPa d5, % d y, %
Flattened strip as supplied on the other 14-4-694-76
0.05 ≥980 - - -
The mechanical properties of the alloy at short-term burst tests according to GOST 12766-67. Quenching in water from 1200 °C (20 minute exposure)
- ≥654 - ≥45.4 ≥61
The thinnest wire for resistive elements in the delivery state according to GOST 8803-89
0.009-0.4 620-680 - - -
The mechanical properties of the alloy at short-term burst tests according to GOST 12766-67. Quenching in water from 1200 °C (20 minute exposure)
- ≥436 - ≥40 ≥40.2
The alloy in the state of delivery without additional heat treatment
≥400 ≥50 - -
The mechanical properties of the alloy at short-term burst tests according to GOST 12766-67. Quenching in water from 1200 °C (20 minute exposure)
- ≥214 - ≥70.1 ≥72.5
The alloy in the state of delivery without additional heat treatment
≥770 ≥14.5 - -
The mechanical properties of the alloy at short-term burst tests according to GOST 12766-67. Quenching in water from 1200 °C (20 minute exposure)
- ≥92.7 - ≥55 ≥82
- ≥71.88 - ≥70 ≥62.5
- ≥35.41 - ≥130 ≥93.3
- ≥27.37 - ≥110 ≥96.5
- ≥22.95 - ≥101.8 ≥98

Description mechanical marks

Name Description
Section Section
σB Limit short-term strength
d5 Elongation after rupture
d Elongation after rupture
y The relative narrowing

Physical characteristics

Temperature r, кг/м3 R, НОм · м a, 10-6 1/°С
20 8400 1040-1170 -
1000 - - 163

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
Microstructure Austenitic structure.
Features of heat treatment Alloy after special heat treatment has a temperature coefficient of electrical resistance in the temperature range from minus 60 to plus 100 °C about 0.9·10-4 °C-1.
Magnetic properties Non-magnetic alloy.
Окалиностойкость, heat resistance Onlinetony alloy in an oxidizing atmosphere, hydrogen, vacuum; unstable in an atmosphere containing sulfur and sulfur compounds; more heat resistant than homoalanine alloys.
Operating temperature The working temperature of heating element: Optimal 1050 °C, maximum 1100 °C.

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