High-alloy steel – heat and creep resistant steel H20N12S2,X15CrNiSi20-12,1.4828,H18N9S,S30900,Z17CNS20-12,20H20N14S2,SUH309,1Cr20Ni14Si2,20KH20N14S2, - 

High-alloy steel – heat and creep resistant chromium-nickel-silicon steel H20N12S2 PN-71/H-86022
Steel grade
Standard

Chemical composition (%)
C
Mn
Si
P
S
Cu
Cr
Ni
Mo
other
H20N12S2
PN
max
0,20
max
1,50
1,80
2,50
max
0,045
max
0,030
max
0,30
19,00
22,00
11,00 13,00
max
0,50
W max0,50
V max 0,20
20H20N14S2
20KH20N14S2
20Ch20N14S2
20X20H14C2
GOST
max
0,20
max
1,50
2,00
3,00
max
0,035
max
0,025
max
0,30
19,00
22,00
12,00 15,00
max
0,30
W max0,20
V max 0,20
Ti max 0,20
X 15 CrNiSi 20-12
X15CrNiSi20-12
X15CrNiSi2012
1.4828

DIN

W.nr
max
0,20
max
2,00
1,50
2,50
max
0,045
max
0,015
-
19,00
21,00
11,00 13,00

-
N max 0,11
S 30900
S30900
309

UNS
AISI
max
0,20
max
2,00
max
1,00
max
0,045
max
0,030
-
22,00
24,00
12,00 15,00
-
-
H 8
H8
MSZ
max
0,20
max
2,00
0,80
2,00
max
0,040
max
0,030
max
0,30
17,00
20,00
8,00
11,00
-
-
SUH 309
SUH309
JIS
max
0,20
max
2,00
max
1,00
max
0,040
max
0,030
-
22,00
24,00
12,00 15,00
-
-
Z 17 CNS 20-12
Z17CNS20-12
AFNOR
max
0,17
max
2,00
1,50
2,50
max
0,040
max
0,015
-
19,00
21,50
11,00 13,00
-
-
1Cr20Ni14Si2
GB/T
max
0,20
max
1,50
1,50
2,50
max
0,035
max
0,030
-
19,00
22,00
12,00 15,00
-
-
H18N9S
PN
0,10
0,20
max
2,00
0,80
2,00
max
0,045
max
0,030
-
17,00
20,00
8,00
11,00
max
0,50
W max0,50
V max 0,20 

H20N12S2 steel grade is austeniting steel intended for the production of highly loaded parts working in high temperatures, 
heat-resistant in the air to the temperature of around 1050 o C. 
H18N9S grade according to PN-71/H-86022 is a constant steel which has a similar usage as H20N12S2 steel. 
H18N9S a heat-resistant steel in the air to the temperature of 850 ° C, and creep resistant is u to the temperature of 
approximately 650 ° C. 

H20N12S2, H18N9S grades or equivalent are offered as steel, rolled and forged rods, bars, tubes and small forgings.
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