Alloy ХН50МВКТЮР (ЭП99)

Designation

Name The value
Designation GOST Cyrillic ХН50МВКТЮР
Designation GOST Latin XH50MBKTJuP
Transliteration HN50MVKTYuR
By chemical elements CrNi50CuВCoTeAlHg
Name The value
Designation GOST Cyrillic ЭП99
Designation GOST Latin EP99
Transliteration EhP99
By chemical elements -

Description

Alloy ХН50МВКТЮР used: for the manufacture of rolled plates; details of special equipment operating at temperatures up to +950°C, turbo parts and aircraft manufacturers; welded rings.

Note

High-temperature Nickel-based alloy.

Standards

Name Code Standards
Sheets and strips В23 GOST 19904-90
Blanks. Of the workpiece. Slabs В31 OST 1 90254-77, TU 14-1-1214-75
Sheets and strips В33 TU 14-1-146-71, TU 14-1-1747-76, TU 14-1-5103-92
Bars and shapes В32 TU 14-1-1476-75
Tape В34 TU 14-1-4423-88

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Al B Ti Mo Nb W Ce Co
TU 14-1-146-71 ≤0.1 ≤0.015 ≤0.015 ≤0.4 18-20 ≤0.5 Rest ≤5 ≤0.07 2.5-3.2 ≤0.005 1-1.5 3.5-5 ≤1.5 6-7.5 ≤0.02 5-8
TU 14-1-1747-76 ≤0.1 ≤0.015 ≤0.015 ≤0.3 17.5-19.5 ≤0.3 Rest ≤3 ≤0.07 2.5-3 ≤0.005 1-1.5 3.5-5 ≤1.5 5.5-7 ≤0.02 5-8
TU 14-1-5103-92 ≤0.1 ≤0.015 ≤0.015 ≤0.4 17.5-19.5 ≤0.5 Rest ≤5 - 2.5-3 ≤0.005 1-1.5 3.5-5 ≤1.5 5.5-7 ≤0.02 5-8
Ni is the basis.
According to TU 14-1-146-71, TU 14-1-5103-92 and TU 14-1-1747-76, the chemical composition is given for steel grade KhN50MVKTYUR-ID (EP99-ID).
According to TU 14-1-5103-92 boron, cerium and zirconium are introduced into the metal by calculation and chemical analysis are not determined. The alloy is smelted in vacuum-induction furnaces, followed by remelting in a vacuum-arc furnace.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, %
Ring welded of alloy grade ХН50МВКТЮР-ID on OST 1 90254-77. Hardening in air, 1080-1100 °C (2-4 h exposure) + Aging at 760±20 °C (exposure 12-16 hours), air cooling
≥785 ≥1177 ≥20 ≥22
Hot-rolled sheet. Quenching in water from 1080-1120 °C + Aging at 750-770 °C (exposure 8-12 hours) or at 890-910 (extract 8 hours)
4-11 ≥835 ≥1180 ≥20 -
Ring welded of alloy grade ХН50МВКТЮР-ID on OST 1 90254-77. Hardening in air, 1080-1100 °C (2-4 h exposure) + Aging at 760±20 °C (exposure 12-16 hours), air cooling
≥706 ≥1059 ≥9 ≥10
Hot-rolled sheet. Quenching in water from 1080-1120 °C + Aging at 750-770 °C (exposure 8-12 hours) or at 890-910 (extract 8 hours)
4-11 - ≥490 ≥9 -
Hot-rolled sheet. Quenching in water, in air or under water shower with 1080-1120 °C
4-11 - ≥1180 ≥35 -
Steel cold-rolled sheet (0.8 to 3.9 mm) in the delivery condition. Quenching in water from 1080-1100 °C (20 min exposure) + Aging at 750-770 °C (exposure 8-12 hours), air cooling
- - ≥490 ≥9 -
Steel cold-rolled sheet (0.8 to 3.9 mm) as supplied
- - ≥1180 ≥35 -

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
d5 Elongation after rupture
y The relative narrowing