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Alloy KHN70JU-N

Designation

Name The value
Designation GOST Cyrillic ХН70Ю-Н
Designation GOST Latin XH70Ju-H
Transliteration HN70Yu-N
The chemical elements CrNi70Al-Ni

Description

Alloy KHN70JU-N is used: for the manufacture of heaters for industrial furnaces with maximum operating temperatures up to 1200 °C; heating elements and resistance elements.

Note

The heat resisting alloy in an oxidizing atmosphere, hydrogen, nitrogen-hydrogen blends, vacuum; more heat resistant than zhelezomargantsevye alloys.

Standards

Name Code Standards
Classification, nomenclature and general norms В30 GOST 10994-74
Steel alloy wire В73 GOST 12766.1-90, TU 14-131-820-90
Sectional and shaped rolling В32 GOST 12766.3-90, GOST 12766.4-90, TU 14-11-245-88
Welding and cutting of metals. Soldering, riveting В05 TU 14-1-997-2012

Chemical composition

Standard C S P Mn Cr Si Ni Fe Al Ce Ba
GOST 10994-74 ≤0.1 ≤0.02 ≤0.02 ≤0.3 26-28.9 ≤0.8 The rest ≤1.5 3-3.8 ≤0.03 ≤0.1
Ni is the basis.

Mechanical characteristics

Section, mm σB, MPa d
Wire cold-drawn heat-treated in the delivery condition according to GOST 12766.1-90 (the value is δ200)
≤880 ≥15

Description mechanical marks

Name Description
Section Section
σB Limit short-term strength
d Elongation after rupture

Physical characteristics

Temperature r, кг/м3 R, НОм · м a, 10-6 1/°С С, Дж/(кг · °С)
20 7900 1250-1350 - 460
1000 - - 21 -

A description of the physical symbols

Name Description
Е The normal elasticity modulus
l Coefficient of thermal conductivity
С Specific heat

Technological properties

Name The value
Microstructure Austenitic structure.
Magnetic properties Non-magnetic alloy.
Operating temperature Recommended maximum working temperature of the heating element from 950 °C at a thickness of 0.2 mm to 1200 °C thickness ≥ 6.0 mm.
Vitality Survivability at a temperature of 1200 °C for at least 100 hours.

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