Alloy 36NKHTJU8M (ЭП52)

Designation

Name The value
Designation GOST Cyrillic 36НХТЮ8М
Designation GOST Latin 36HXTJu8M
Transliteration 36NHTYu8M
By chemical elements 36NiCrTeAl8Cu
Name The value
Designation GOST Cyrillic ЭП52
Designation GOST Latin EP52
Transliteration EhP52
By chemical elements -

Description

Alloy 36NKHTJU8M used: for the production of cold-rolled strips and wire used in the manufacture of elastic and provocatively elements operating at temperatures up to 400 °C.

Note

Alloy non-magnetic corrosion-resistant dispersion-hardened with a temporary resistance 1375−1960 MN/m2 (140−200 kg/mm2) with normal elasticity modulus 196000−216000 MN/m2 (20000−22000 kgf/mm2).
From 01.01.1991 alloy 36NKHTJU8M not allowed to use in the newly created and upgraded technology.

Standards

Name Code Standards
Classification, nomenclature and General rules В30 GOST 10994-74
Tape В34 GOST 14117-85, TU 14-1-1373-75, TU 14-1-279-72
Wire, steel, alloy В73 GOST 14118-85, TU 14-1-2880-80
Bars and shapes В32 TU 14-11-245-88

Chemical composition

Standard C S P Mn Cr Si Ni Fe Al Ti Mo
TU 14-1-279-72 ≤0.06 ≤0.02 ≤0.02 0.8-1.2 12-13.5 0.3-0.7 35-37 Rest 1-1.3 2.7-3.2 7.5-8.5
GOST 10994-74 ≤0.05 ≤0.02 ≤0.02 0.8-1.2 12-13.5 0.3-0.7 35-37 Rest 1-1.3 2.7-3.2 7.5-8.5
Fe is the basis.
According to GOST 10994-74, the chemical composition is presented for the 36NXTU8M alloy (EP52).
According to TU 14-1-279-72, the chemical composition is presented for the 36NXTU8M alloy (EP52). Deviations in chemical composition are allowed: for aluminum ± 0.10%, for titanium ± 0.10%.

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d HRC
Cold-rolled steel strip (samples) in the delivery state according to GOST 14117-85. Quenching in water from 1000-1050 °C + Aging at 740-760 °C (exposure 4 h)
0.1-0.9 - - ≥1270 ≥4 -
1-2 - ≥1030 ≥1320 ≥4 ≥42
Cold-rolled steel strip as supplied by GOST 14117-85
0.1-2 - - ≥1180 - -
0.1-2 - - 980-1230 ≥1 -
Cold-rolled steel strip as supplied by GOST 14117-85. Quenching in water from 1000-1050 °C
0.1-2 - - ≤980 ≥15 -
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)
- 750, 4ч 930-1130 1270-1420 ≥3 -
- 700-725, 2ч 1270-1420 1420-1570 ≥1 -
- 700-725, 2-3ч 1080-1270 1320-1470 ≥2 -
Cold-rolled steel strip on the other 14-1-279-72. Quenching in water from 1040-1060 °C (exposure during heating for quenching in an electric furnace - 2 minutes to 0.1 mm thicknesses)
- - - ≥25 ≤28
Cold-rolled steel strip on the other 14-1-279-72. Quenching in water from 990-1010 °C + Vacation at 750 °C (endurance 4 hours), air cooling
- ≥1080 ≥1373 ≥5 ≥44
Cold drawn wire in the delivery state according to GOST 14118-85. Aging at 690-710 °C (exposure 2 hours), air cooling
0.3-5 - - ≥1570 - -
0.3-5 - - ≥1370 - -
Wire cold-drawn at THAT 14-1-279-72.
0.5-5 - - ≥981 - -
0.5-5 - - ≥1373 - -

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
HRC Rockwell hardness (indenter diamond spheroconical)