Alloy KHN70JU (ЭИ652)

Designation

Name The value
Designation GOST Cyrillic ХН70Ю
Designation GOST Latin XH70Ju
Transliteration HN70Yu
By chemical elements CrNi70Al
Name The value
Designation GOST Cyrillic ЭИ652
Designation GOST Latin EI652
Transliteration EhI652
By chemical elements -

Description

Alloy KHN70JU applies: for production of components of gas pipeline systems and various parts operating at moderate voltages, at 1100−1200 °C (can be applied to the heating resistance elements); a welding wire used for welding parts and welding of steel structures in energy engineering; welding electrodes; welding parts and assemblies working in radioactive environments, connections of details from alloy grade 46ХНМ (ЭП630) with details of korrozionnostojkih steel type 12X18H10T, 10X17H13M2T.

Note

Alloy, heat-resistant and heat-resistant Nickel-based.
The recommended maximum operating temperature for a long time +1200 °C, for a limited time +1100 °C.
The temperature of beginning of intensive scaling in air — up to +1200 °C.
Alloy KHN70JU unstable in sulfur-containing environments.

Standards

Name Code Standards
Sheets and strips В33 GOST 24982-81, TU 14-1-1909-76, TU 14-134-255-90, TU 14-1-493-72
Classification, nomenclature and General rules В30 GOST 5632-72
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-1214-75
Welding and cutting metals. Soldering, riveting В05 OST 95 10441-2002, TU 14-1-997-74, TU 14-1-997-2012
Bars and shapes В32 TU 14-1-1497-75, TU 14-11-245-88
Tape В34 TU 14-1-833-74
Wire, steel, alloy В73 TU 14-131-820-90

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Al Ti Mo Ce Ba
TU 14-1-997-74 ≤0.1 ≤0.012 ≤0.015 ≤0.3 26-29 ≤0.8 Rest ≤1 ≤0.07 2.8-3.5 - - ≤0.03 ≤0.1
GOST 5632-72 ≤0.1 ≤0.012 ≤0.015 ≤0.3 26-29 ≤0.8 Rest ≤1 ≤0.3 2.8-3.5 ≤0.2 ≤0.3 ≤0.03 ≤0.1
Ni is the basis.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % d4
Steel cold-rolled sheet (0.8 to 3.9 mm) and HR (2.0 to 3.9 mm) in the delivery state according to GOST 24982-81. Quenching in water, under a water shower or air from 1100-1150 °C
≤3.9 - ≥100 ≥25 -
Pre-painted steel sheet. Annealing in air from 1100 °C
- ≥480 ≥880 - ≥35
Steel cold-rolled sheet (0.8 to 3.9 mm) and HR (2.0 to 3.9 mm) in the delivery state according to GOST 24982-81. Quenching in water, under a water shower or air from 1100-1150 °C
≤3.9 - ≤980 ≥30 -
Pre-painted steel sheet. Annealing in air from 1100 °C
- ≥490 ≥880 - ≥37
Steel cold-rolled sheet (0.8 to 3.9 mm) and HR (2.0 to 3.9 mm) in the delivery state according to GOST 24982-81. Quenching in water, under a water shower or air from 1100-1150 °C
≤3.9 - ≥100 ≥40 -
Pre-painted steel sheet. Annealing in air from 1100 °C
- ≥370 ≥760 - ≥37
- ≥360 ≥730 - ≥35
- ≥320 ≥480 - ≥37
- ≥170 ≥225 - ≥38
- - ≥145 - ≥50
- - ≥88 - ≥61

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
d4 Elongation after rupture

Physical characteristics

Temperature Е, HPa r, kg/m3 l, W/(m · °C) a, 10-6 1/°C
0 191 7900 12 -
20 191 7900 117 -
100 182 - 13 1314
200 173 - 14 1386
300 166 - 16 1476
400 156 - 17 1568
500 147 - 19 1639
600 137 - 21 1781
700 118 - 23 2242
800 94 - 25 2547
900 - - 269 2134
1000 - - - 2121

A description of the physical symbols

Name Description
Е The normal elasticity modulus
r Density
l Coefficient of thermal conductivity
R UD. the resistivity
a The coefficient of linear expansion

Technological properties

Name The value
Weldability limited weldability, manual argon arc welding with non-consumable electrode (filler or without filler metal), use of combined methods of welding. Requires selection of special modes in the weld joint has high strength.
The temperature of forging Start - 1200 °C, the end - 1100 °C. air Cooling.