AISI/SAE grade | UNS | DIN | EN steel number | EN steel name | BS | UNI | JIS |
(USA) | (USA) | (Germany) | (Europe) | (Europe) | (UK) | (Italy) | (Japan) |
4130 | 25CrMo4 | 1.7218 | 708A30 | 25CrMo4 (KB) | SCM 420 | ||
GS-25CrMo4 | CDS110 | 30CrMo4 | SCM 430 | ||||
SCCrM1 | |||||||
4140/4142 | 41CrMo4 | 1.7223 | 42CrMo4 | 708M40 | 41CrMo4 | SCM 440 | |
42CrMo4 | 1.7225 | 708A42 | 38CrMo4 (KB) | SCM 440H | |||
42CrMoS4 | 1.7227 | 709M40 | G40 CrMo4 | SNB 7 | |||
43CrMo4 | 1.3563 | En19 | 42CrMo4 | SCM 4M | |||
En19C | SCM 4 | ||||||
4340 | 34CrNiMo6 | 1.6582 | 34CrNiMo6 | 817M40 | 35NiCrMo6 (KB) | SNCM 447 | |
40NiCrMo8-4 | 1.6562 | En24 | 40NiCrMo7 (KB) | SNB24-1-5 | |||
8620 | 21NiCrMo22 | 1.6543 | 20NiCrMo2-2 | 805A20 | 20NiCrMo2 | SNCM 200 (H) | |
21NiCrMo2 | 1.6523 | 805M20 | |||||
K12822 | 15Mo3 | 1.5415 | 16Mo3 | 1503-243B | 15Mo3 | STBA12 | |
K12320 | 240 | 16Mo3 | |||||
K12020 | 243 | ||||||
K11820 | |||||||
F 5/F 5A | K 41545 | 12CrMo195 | |||||
F 9 | K 90941 | X12CrMo91 | |||||
F 11 (CL2) | K 11572 | 13CrMo44 | |||||
F 22 (CL3) | K 21590 | 10CrMo910 | |||||
F 91 | X10CrMoVNb9-1 |
Specification for Piping Fittings of Wrought Alloy Steel for Moderate and High Temperature Service
Gr. | C | Mn | P max |
S max |
Si |
WP1 | 0.28 max |
0.3 0.9 |
0.045 | 0.045 | 0.1 0.5 |
WP12 CL1 | 0.05 0.2 |
0.3 0.8 |
0.045 | 0.045 | 0.6 max |
WP12 CL2 | 0.05 0.2 |
0.3 0.8 |
0.045 | 0.045 | 0.6 max |
WP11 CL1 | 0.05 0.15 |
0.3 0.6 |
0.03 | 0.03 | 0.5 1.0 |
WP11 CL2 | 0.05 0.2 |
0.3 0.8 |
0.04 | 0.04 | 0.5 1.0 |
WP11 CL3 | 0.05 0.2 |
0.3 0.8 |
0.04 | 0.04 | 0.5 1.0 |
WP22 CL1 | 0.05 0.15 |
0.3 0.6 |
0.04 | 0.04 | 0.5 max |
WP22 CL3 | 0.05 0.15 |
0.3 0.6 |
0.04 | 0.04 | 0.5 max |
WP5 CL1 | 0.15 max |
0.3 0.6 |
0.04 | 0.03 | 0.5 max |
WP5 CL3 | 0.15 max |
0.3 0.6 |
0.04 | 0.03 | 0.5 max |
WP9 CL1 | 0.15 max |
0.3 0.6 |
0.03 | 0.03 | 1.0 max |
WP9 CL3 | 0.15 max |
0.3 0.6 |
0.03 | 0.03 | 1.0 max |
WPR | 0.2 max |
0.4 1.06 |
0.045 | 0.05 | |
WP91 | 0.08 0.12 |
0.3 0.6 |
0.02 | 0.01 | 0.2 0.5 |
WP911 | 0.09 0.13 |
0.3 0.6 |
0.02 | 0.01 | 0.1 0.5 |
Composition, % | |||||
Gr. | Cr | Mo | Ni | Cu | Others |
WP1 | 0.44 0.65 |
||||
WP12 CL1 | 0.8 1.25 |
0.44 0.65 |
|||
WP12 CL2 | 0.8 1.25 |
0.44 0.65 |
|||
WP11 CL1 | 1.0 1.5 |
0.44 0.65 |
|||
WP11 CL2 | 1.0 1.5 |
0.44 0.65 |
|||
WP11 CL3 | 1.0 1.5 |
0.44 0.65 |
|||
WP22 CL1 | 1.9 2.6 |
0.87 1.13 |
|||
WP22 CL3 | 1.9 2.6 |
0.87 1.13 |
|||
WP5 CL1 | 4. 6. |
0.44 0.65 |
|||
WP5 CL3 | 4. 6. |
0.44 0.65 |
|||
WP9 CL1 | 8. 10. |
0.9 1.1 |
|||
WP9 CL3 | 8. 10. |
0.9 1.1 |
|||
WPR | 1.6 2.24 |
0.75 1.25 |
|||
WP91 | 8. 9.5 |
0.85 1.05 |
0.4 max |
V 0.18 0.25 Nb 0.06 0.1 N 0.03 0.07 Al 0.02 max (6) Ti 0.01 max (6) Zr 0.01 max (6) |
|
WP911 | 8. 9.5 |
0.9 1.1 |
0.4 max |
V 0.18 0.25 Nb 0.06 0.1 N 0.04 0.09 Al 0.02 max (6) B 0.0003 0.006 W 0.9 1.1 Ti 0.01 max (6) Zr 0.01 max (6) |
Specification for Alloy Steel Forgings for Piping Applications
Identification Symbol | UNS Designation | C | Mn | P | S | Si | Cr | Ni | Mo | Other Elements |
F 1 | K12822 | 0.28 | 0.6-0.9 | 0.045 | 0.045 | 0.15-0.35 | 0.44-0.65 | |||
F 2B | K12122 | 0.05-0.21 | 0.3-0.8 | 0.04 | 0.04 | 0.1-0.6 | 0.5-0.81 | 0.44-0.65 | ||
F 5C | K41545 | 0.15 | 0.3-0.6 | 0.03 | 0.03 | 0.5 | 4.0-6.0 | 0.5 | 0.44-0.65 | |
F 5aC | K42544 | 0.25 | 0.6 | 0.04 | 0.03 | 0.5 | 4.0-6.0 | 0.5 | 0.44-0.65 | |
F 9 | K90941 | 0.15 | 0.3-0.6 | 0.03 | 0.03 | 0.5-1 | 8.0-10.0 | 0.9-1.1 | ||
F 10 | S33100 | 0.1-0.2 | 0.5-0.8 | 0.04 | 0.03 | 1-1.4 | 7.0-9.0 | 19-22 | ||
F 91 | K90901 | 0.08-0.12 | 0.3-0.6 | 0.02 | 0.01 | 0.2-0.5 | 8-9.5 | 0.4 | 0.85-1.05 | N[0.03-0.07] Al [0.02D] |
Ti [0.01D] | ||||||||||
Cb [0.06-0.1] V [0.18-0.25] Zr [0.01D] |
||||||||||
F 92 | K92460 | 0.07-0.13 | 0.3-0.6 | 0.02 | 0.01 | 0.5 | 8.5-9.5 | 0.4 | 0.3-0.6 | N[0.03-0.07] Al [0.02D] |
Ti [0.01D] | ||||||||||
Cb[0.04-0.09] B [0.001-0.006] | ||||||||||
W [1.5-2.0] | ||||||||||
V [0.15-0.25] Zr [0.01D] | ||||||||||
F 122 | K91271 | 0.07-0.14 | 0.7 | 0.02 | 0.01 | 0.5 | 10-11.5 | 0.5 | 0.25-0.6 | N[0.04-0.1] Cu [0.3-1.7] Al [0.02D] |
Ti [0.01D] | ||||||||||
Cb [0.04-0.1] B [0.005] | ||||||||||
W [1.5-2.5] | ||||||||||
V [0.15-0.3] Zr [0.01D] | ||||||||||
F 911 | K91061 | 0.09-0.13 | 0.3-0.6 | 0.02 | 0.01 | 0.1-0.5 | 8.5-9.5 | 0.4 | 0.9-1.1 | N[0.04-0.09] Al [0.02D] |
Ti [0.01D] | ||||||||||
Cb [0.06-0.1] B [0.0003-0.006] | ||||||||||
W [0.9-1.1] | ||||||||||
V [0.18-0.25] Zr [0.01D] | ||||||||||
F 11 | K11597 | 0.05-0.15 | 0.3-0.6 | 0.03 | 0.03 | 0.5-1.0 | 1-1.5 | 0.44-0.65 | ||
Class 1 | ||||||||||
F 11 | K11572 | 0.1-0.2 | 0.3-0.8 | 0.04 | 0.04 | 0.5-1.0 | 1-1.5 | 0.44-0.65 | ||
Class 2 | ||||||||||
F 11 | K11572 | 0.1-0.2 | 0.3-0.8 | 0.04 | 0.04 | 0.5-1.0 | 1-1.5 | 0.44-0.65 | ||
Class 3 | ||||||||||
F 12 | K11562 | 0.05-0.15 | 0.3-0.6 | 0.045 | 0.045 | 0.5 max | 0.8-1.25 | 0.44-0.65 | ||
Class 1 | ||||||||||
F 12 | K11564 | 0.1-0.2 | 0.3-0.8 | 0.04 | 0.04 | 0.1-0.6 | 0.8-1.25 | 0.44-0.65 | ||
Class 2 | ||||||||||
F 21 | K31545 | 0.05-0.15 | 0.3-0.6 | 0.04 | 0.04 | 0.5 max | 2.7-3.3 | 0.8-1.06 | ||
F 3V | K31830 | 0.05-0.18 | 0.3-0.6 | 0.02 | 0.02 | 0.1 | 2.8-3.2 | 0.9-1.1 | Ti [0.015-0.035] | |
B [0.001-0.003] | ||||||||||
V [0.2-0.3] | ||||||||||
F 3VCb | K31390 | 0.1-0.15 | 0.3-0.6 | 0.02 | 0.01 | 0.1 | 2.7-3.3 | 0.25 | 0.9-1.1 | Cu [0.25] |
Ti [0.015] | ||||||||||
Cb [0.015-0.07] | ||||||||||
V [0.2-0.3] | ||||||||||
Ca [0.0005–0.0150] | ||||||||||
F 22 | K21590 | 0.05-0.15 | 0.3-0.6 | 0.04 | 0.04 | 0.5 | 2.0-2.5 | 0.87-1.13 | ||
Class 1 | ||||||||||
F 22 | K21590 | 0.05-0.15 | 0.3-0.6 | 0.04 | 0.04 | 0.5 | 2.0-2.5 | 0.87-1.13 | ||
Class 3 | ||||||||||
F 22V | K31835 | 0.11-0.15 | 0.3-0.6 | 0.015 | 0.01 | 0.1 | 2.0-2.5 | 0.25 | 0.9-1.1 | Cu [0.2] |
Ti [0.03] | ||||||||||
Cb [0.07] | ||||||||||
B [0.002] | ||||||||||
V [0.25-0.35] Ca [0.015E] | ||||||||||
F 23 | K41650 | 0.04-0.1 | 0.1-0.6 | 0.03 | 0.01 | 0.5 | 1.9-2.6 | 0.4 | 0.05-0.3 | N[0.015F] |
Al [0.03] | ||||||||||
Ti [0.005-0.06F] | ||||||||||
Cb [0.02-0.08] | ||||||||||
B [0.001-0.006] | ||||||||||
W [1.45-1.75] V [0.2-0.3] | ||||||||||
F 24 | K30736 | 0.05-0.1 | 0.3-0.7 | 0.02 | 0.01 | 0.15-0.45 | 2.2-2.6 | 0.9-1.1 | N[0.12] | |
Al [0.02] | ||||||||||
Ti [0.06-0.1] B [0.0015-0.007] | ||||||||||
V [0.2-0.3] | ||||||||||
FR | K22035 | 0.2 | 0.4-1.06 | 0.045 | 0.05 | 1.6-2.24 | Cu [0.75-1.25] | |||
F 36 | K21001 | 0.1-0.17 | 0.8-1.2 | 0.03 | 0.025 | 0.25-0.5 | 0.3 | 1-1.3 | 0.25-0.5 | N[0.02] |
Cu [0.5-0.8] | ||||||||||
Al [0.05] | ||||||||||
V [0.02] |
Grade Symbol | Tensile Strength, min, ksi [MPa] |
Yield Strength, min, ksi [MPa]B |
Elongation in 2 in. [50 mm] or 4D, min, % |
Reduction of Area, min, % |
Brinell Hardness Number, HBW, unless otherwise indicated |
F 1 | 70 [485] | 40 [275] | 20 | 30 | 143–192 |
F 2 | 70 [485] | 40 [275] | 20 | 30 | 143–192 |
F 5 | 70 [485] | 40 [275] | 20 | 35 | 143–217 |
F 5a | 90 [620] | 65 [450] | 22 | 50 | 187–248 |
F 9 | 85 [585] | 55 [380] | 20 | 40 | 179–217 |
F 10 | 80 [550] | 30 [205] | 30 | 50 | . . . |
F 91 | 90 [620] | 60 [415] | 20 | 40 | 190–248 |
F 92 | 90 [620] | 64 [440] | 20 | 45 | 269 max |
F 122 | 90 [620] | 58 [400] | 20 | 40 | 250 max |
F 911 | 90 [620] | 64 [440] | 18 | 40 | 187–248 |
F 11 Class 1 |
60 [415] | 30 [205] | 20 | 45 | 121–174 |
F 11 Class 2 |
70 [485] | 40 [275] | 20 | 30 | 143–207 |
F 11 Class 3 |
75 [515] | 45 [310] | 20 | 30 | 156–207 |
F 12 Class 1 |
60 [415] | 32 [220] | 20 | 45 | 121–174 |
F 12 Class 2 |
70 [485] | 40 [275] | 20 | 30 | 143–207 |
F 21 | 75 [515] | 45 [310] | 20 | 30 | 156–207 |
F 3V & F 3VCb | 85–110 [585–760] | 60 [415] | 18 | 45 | 174–237 |
F 22 Class 1 |
60 [415] | 30 [205] | 20 | 35 | 170 max |
F 22 Class 3 |
75 [515] | 45 [310] | 20 | 30 | 156–207 |
F 22V | 85–110 [585–780] | 60 [415] | 18 | 45 | 174–237 |
F 23 | 74 [510] | 58 [400] | 20 | 40 | 220 max |
F 24 | 85 [585] | 60 [415] | 20 | 40 | 248 max |
FR | 63 [435] | 46 [315] | 25 | 38 | 197 max |
F 36 Class 1 | 90 [620] | 64 [440] | 15 | . . . | 252 max |
F 36 Class 2 | 95.5 [660] | 66.5 [460] | 15 | . . . | 252 max |