Alloy Х20Н32Т (KHN32T; ЭП670)

Designation

Name The value
Designation GOST Cyrillic Х20Н32Т
Designation GOST Latin X20H32T
Transliteration H20N32T
By chemical elements Cr20Ni32Te
Name The value
Designation GOST Cyrillic ХН32Т
Designation GOST Latin XH32T
Transliteration HN32T
By chemical elements CrNi32Te
Name The value
Designation GOST Cyrillic ЭП670
Designation GOST Latin EP670
Transliteration EhP670
By chemical elements -

Description

Alloy Х20Н32Т used: for the production of HRP (5−20 mm); exhaust pipes; sheet metal parts of high temperature installations in petrochemical engineering for a long service at temperatures of +700−850 °C.

Note

High-temperature alloy, iron-Nickel basis.
The recommended maximum operating temperature for a very long time +850 °C. the Temperature of beginning of intensive scaling in air to +1000 °C.

Standards

Name Code Standards
Bars and shapes В22 GOST 1133-71, GOST 2590-2006
Bars and shapes В32 GOST 14955-77, TU 14-1-284-72, TU 14-11-245-88
Sheets and strips В33 GOST 24982-81, TU 14-1-625-73
Processing of metals by pressure. Forgings В03 GOST 25054-81
Classification, nomenclature and General rules В30 GOST 5632-72
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-2111-77
Thermal and thermochemical treatment of metals В04 STP 26.260.484-2004
Steel pipes and fittings to them В62 TU 14-3-489-76, TU 14-158-135-2003

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Al Ti Mo
TU 14-1-625-73 ≤0.05 ≤0.02 ≤0.03 ≤0.7 19-22 ≤0.7 30-34 Rest ≤0.3 ≤0.5 0.25-0.6 -
GOST 5632-72 ≤0.05 ≤0.02 ≤0.03 ≤0.7 19-22 ≤0.7 30-34 Rest ≤0.3 ≤0.5 0.25-0.6 ≤0.3
Fe is the basis.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, %
Steel cold-rolled sheet (0.8 to 3.9 mm) and HR (2.0 to 11.0 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 ≥195 ≥470 ≥25 -
4-11 ≥175 ≥490 ≥30 -
Forgings. Annealing in air from 1100-1150 °C
≤100 ≥176 ≥470 ≥30 ≥35
Bars hot rolled and forged 20-180 mm on THAT 14-1-284-72. Quenching in water or air from 1100-1150 °C
≥177 ≥470 ≥40 ≥60
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1100-1150 °C
≥180 ≥490 ≥30 ≥35
Heavy-gauge hot-rolled steel in the delivery state on the other 14-1-625-73. Quenching in water or air with 1080-1120 °C
5-20 ≥178 ≥494 ≥30 -
Cold-rolled tubes after austenization on delivery
- ≥470 ≥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

Physical characteristics

Temperature Е, HPa r, kg/m3 l, W/(m · °C) a, 10-6 1/°C
20 205 8160 159 -
100 - - 134 137
200 - - 151 156
300 - - 167 172
400 - - 18 18
500 - - 192 18
600 - - 205 184
700 - - 217 189
800 - - 234 19

A description of the physical symbols

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

Technological properties

Name The value
Features of heat treatment Product details chemical engineering from KHN32T alloy should be quenched from 1100-1150 °C. Extract with a wall thickness of 15 mm - 30 min, more than 15 mm - 30 min + 1 min per 1 mm max thickness cooling in water or air.