How to select equivalent grades when using steel in high temperature?

Stainless steel is one of the most used materials in piping for applications ranging from small, low cost and domestic applications to large, complex and high cost industrial and commercial applications. There are different requirements for different applications and the different grades of the stainless steel can provide the necessary standards. Sometimes, the prescribed material might not be found, costly or not necessarily mandatory.

In these cases, equivalent materials could be used. The operating temperature is one of the limiting factors that could demand a specification of steel. When another material with the similar mechanical properties is accessible, it could be used as an equivalent material. For example, the A53 grade B is a carbon steel alloy that is used in structural applications.

It could be replaced with A106 grade B pipes which are also seamless carbon steels. These are meant for low pressure low temperature materials. For high pressure and high temperature services, the 321 titanium stabilized austenitic stainless steels are used. When required, the 347 niobium stabilized steels could be used as replacement. With difference in composition, they both share high temperature properties which make them interchangeable.

Here you can find various steel grades known with different name in different countries. These standards display the specific manufacturing methods of the material. There are many different standards which belongs to the same grade of steel. Below table explain that a steel grade is known with different standard in different country.

(Europe) (Europe) (USA) (USA) (Germany) (UK) (Italy) (Japan)
Werkstoff Nr # EN name SAE/AISI UNS Designation DIN Standard BS 970 UNI JIS Standard
Carbon steel material
1.1141
1.0401
1.0453
C15D
C18D
1018 CK15
C15
C16.8
040A15
080M15
080A15
EN3B
C15
C16
1C15
S15
S15CK
S15C
1.0503
1.1191
1.1193
1.1194
C45 1045 C45
CK45
CF45
CQ45
060A47
080A46
080M46
C45
1C45
C46
C43
S45C
S48C
1.0726
1.0727
35S20
45S20
1140/1146 35S20
45S20
212M40
En8M
1.0715
1.0736
11SMn37 1215 9SMn28
9SMn36
230M07
En1A
CF9SMn28
CF9SMn36
SUM 25
SUM 22
1.0718
1.0737
11SMnPb30
11SMnPb37
12L14 9SMnPb28
9SMnPb36
230M07 Leaded
En1A Leaded
CF9SMnPb29
CF9SMnPb36
SUM 22L
SUM 23L
SUM 24L
Alloy steel material
1.7218 4130 25CrMo4
GS-25CrMo4
708A30
CDS110
25CrMo4 (KB)
30CrMo4
SCM 420
SCM 430
SCCrM1
1.7223
1.7225
1.7227
1.3563
42CrMo4 4140/4142 41CrMo4
42CrMo4
42CrMoS4
43CrMo4
708M40
708A42
709M40
En19
En19C
41CrMo4
38CrMo4 (KB)
G40 CrMo4
42CrMo4
SCM 440
SCM 440H
SNB 7
SCM 4M
SCM 4
1.6582
1.6562
34CrNiMo6 4340 34CrNiMo6
40NiCrMo8-4
817M40
En24
35NiCrMo6 (KB)
40NiCrMo7 (KB)
SNCM 447
SNB24-1-5
1.6543
1.6523
20NiCrMo2-2 8620 21NiCrMo22
21NiCrMo2
805A20
805M20
20NiCrMo2 SNCM 200 (H)
Stainless steel material
1.4310 X10CrNi18-8 301 S30100
1.4318 X2CrNiN18-7 301LN
1.4305 X8CrNiS18-9 303 S30300 X10CrNiS18-9 202S 21
En58M
X10CrNiS18-09 SUS 303
1.4301 X2CrNi19-11
X2CrNi18-10
304 S30400 X5CrNi18-9
X5CrNi18-10
XCrNi19-9
304S 15
304S 16
304S 18
304S 25
En58E
X5CrNi18-10 SUS 304
SUS 304-CSP
1.4306 X2CrNi19-11 304L S30403 304S 11 SUS304L
1.4311 X2CrNiN18-10 304LN S30453
1.4948 X6CrNi18-11 304H S30409
1.4303 X5CrNi18-12 305 S30500
1.4401
1.4436
X5CrNiMo17-12-2
X5CrNiMo18-14-3
316 S31600 X5CrNiMo17 12 2
X5CrNiMo17 13 3
X5CrNiMo 19 11
X5CrNiMo 18 11
316S 29
316S 31
316S 33
En58J
X5CrNiMo17 12
X5CrNiMo17 13
X8CrNiMo17 13
SUS 316
SUS316TP
1.4404 X2CrNiMo17-12-2 316L S31603 316S 11 SUS316L
1.4406
1.4429
X2CrNiMoN17-12-2
X2CrNiMoN17-13-3
316LN S31653
1.4571 316Ti S31635 X6CrNiMoTi17-12 320S 33
1.4438 X2CrNiMo18-15-4 317L S31703
1.4541 321 S32100 X6CrNiTi18-10 321S 31 SUS321
1.4878 X12CrNiTi18-9 321H S32109
1.4512 X6CrTi12 409 S40900
410 S41000
1.4016 430 S43000 X6Cr17 430S 17 SUS430
440A S44002
1.4112 440B S44003
1.4125 440C S44004
1.4104 440F S44020 X14CrMoS17 SUS430F
1.4539 X1NiCrMoCu25-20-5 904L N08904
1.4547 X1CrNiMoCuN20-18-7 S31254
Tool steel
1.2363 X100CrMoV5 A-2 X100CrMoV51 BA 2 X100CrMoV5-1 KU SKD 12
1.2379 X153CrMoV12 D-2 X153CrMoV12-1 BD 2 X155CrVMo12-1 SKD 11
1.2510 O-1 100MnCrW4 Bo 1 95MnWCr-5 KU

Reference

A guide to equivalent steel grades from Oshwin