Alloy 44NKHTJU

Designation

Name The value
Designation GOST Cyrillic 44НХТЮ
Designation GOST Latin 44HXTJu
Transliteration 44NHTYu
By chemical elements 44NiCrTeAl

Description

Alloy 44NKHTJU used: for the manufacture of elastic and provocatively elements operating at temperatures up to +200 °C.

Note

Alloy dispersion-hardening with low temperature coefficient of modulus of elasticity up to 180−200 °C (15·10-6 1/°C).

Standards

Name Code Standards
Classification, nomenclature and General rules В30 GOST 10994-74
Tape В34 GOST 14117-85
Wire, steel, alloy В73 GOST 14118-85
Bars and shapes В32 GOST 14119-85, TU 14-11-245-88
Classification, nomenclature and General rules В20 OST 1 90005-91

Chemical composition

Standard C S P Mn Cr Si Ni Fe Al Ti
GOST 10994-74 ≤0.05 ≤0.02 ≤0.02 0.3-0.6 5-5.6 0.3-0.6 43.5-45.5 Rest 0.4-0.8 2.2-2.7
Fe is the basis.

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d d10 y, % KCU, kJ/m2 HB, MPa HRC
Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91
- - - ≥1270 - - - - - -
Cold-rolled steel strip (samples) in the delivery state according to GOST 14117-85. Quenching in water from 900-920 °C + Aging at 680-700 °C (extract 3 hours)
0.1-0.9 - - ≥1030 ≥5 - - - - -
1-2 - ≥685 ≥1080 ≥8 - - - - ≥30
Cold-rolled steel strip as supplied by GOST 14117-85
0.1-2 - - ≥800 - - - - - -
Cold-rolled steel strip as supplied by GOST 14117-85. Aging (in the graph, the temperature of leave is specified aging temperature and aging time)
- 680-700, 3ч - - - - - - - -
- 650-675, 1-2ч 1080-1270 1230-1370 ≥3 - - - - -
Cold drawn wire in the delivery state according to GOST 14118-85. Aging at 600-700 °C (exposure 1-2 h), air cooling
0.2-7 - - ≥1370 - - - - - -
0.2-7 - - - - - - - -
Bars and rods, hot-rolled, forged and with special surface finish GOST 14119-85. Quenching in water from 900-920 °C + Aging at 680-700 °C (extract 3-4 hours), air cooling
8-120 - ≥635 ≥980 - ≥15 ≥25 ≥690 300-320 -

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d Elongation after rupture
d10 Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number
HRC Rockwell hardness (indenter diamond spheroconical)