High-alloy steel – heat and creep resistant chromium-nickel stainless steel H23N18 PN-71/H-86022
Steel grade

Standard

Chemical composition (%)

C
Mn
Si
P
S
Cu
Cr
Ni
Mo
other
H23N18
PN
max
0,20
max
1,50
max
1,00
max
0,045
max
0,030
-
22,00
25,00
17,00
20,00
max
0,50
W max 0,50
V max 0,20
20H23N18
20KH23N18
20Ch23N18
20X23N18
10H23N18
10KH23N18
10Ch23N18
10X23N18
GOST
max
0,20
max
0,10
max
2,00
max
1,00
max
0,035
max
0,020
max
0,30
22,00
25,00
17,00
20,00
max
0,30
W max 0,20
V max 0,20
T max 0,20
X 12 CrNi 25-21
X12CrNi25-21
X12CrNi2521

1.4845

DIN


W.nr
max
0,10
max
2,00
max
1,50
max
0,045
max
0,015
-
24,00
26,00
19,00 22,00
-
N max 0,11
Z 12 CNS 25-20
Z12CNS25-20
Z12CNS2520
AFNOR
max
0,15
max
2,00
max
1,00
max
0,040
max
0,030
-
23,00
26,00
18,00 21,00
-
-
S 31000
S31000
314
AISI 314
UNS

AISI
max
0,25
max
2,00
1,50
3,00
max
0,045
max
0,030
-
23,00
26,00
19,00 22,00
- -
S 31000
S31000
310
AISI 310
UNS

AISI
max
0,25
max
2,00
max
1,50
max
0,045
max
0,030
-
24,00
26,00
19,00 22,00
-
-
Austenitic heat resisting steel used in the production of parts and assemblies mechanically loaded working in 
high temperatures, little resistant to gases containing sulfur compounds. Heat resistant in the
air up to the temperature of 1050 o C,
Steel creep resistant up to the temperature of about 700 o C.

H23N18 (AISI 310) grade - the equivalent according to GOST 10X23N18 (10X23H18) is offered as seamless tubes,
hot-rolled and cold-rolled tubes manufactured according to GOST 9941-81 in the dimensional diameter
from 5.0 to fi fi 130.0 wall thickness from 0.2 mm to 12 mm, cold rolled streeps thickness 0,05 - 1,50 width 3 mm to 650 mm.
Alfa-Tech Poland Alfa-Tech round bars www.atsteels.com Poland seamless tubes poland rury bezszwowe zaroodporne i specjalne importowane