| Chemical Composition & Mechanical Properties of Forged Steel Flange |
| A105 - Forgings Carbon Steel for Piping Components |
| A350 - Forgings, Carbon and Low Alloy Steel, Requiring Notch Toughness Testing for Piping Components |
| A182 - Forged or Rolled Alloy Steel Pipe Flanges, Forged Fittings and Valves, and Parts for High Temperature Service |
Spec. No.
Grade |
Chemical Compositions(max%) |
Mechanical Properties (min) |
| C |
Mn |
P |
S |
Si |
Cr |
Cu |
Mo |
Ni |
V |
Nb |
Ti |
Al |
Tensile
(MPa) |
Yield
(MPa) |
Elongation
% |
Reduction
% |
Impact
Akv(J) |
Hardness
(HB) |
| A105 |
0.35 |
0.60-
1.05 |
0.035 |
0.04 |
0.10-
0.35 |
0.3 |
0.4 |
0.12 |
0.4 |
0.05 |
0.02 |
|
|
485 |
250 |
30 |
30 |
|
≤187 |
| LF2 |
0.3 |
0.60-
1.35 |
0.035 |
0.04 |
0.15-
0.30 |
0.3 |
0.4 |
0.12 |
0.4 |
0.03 |
0.02 |
|
|
485-655 |
250 |
30 |
30 |
20 |
≤197 |
| F12 CL1 |
0.05-
0.15 |
0.30-
0.60 |
0.045 |
0.045 |
0.5 |
0.80-
1.25 |
|
0.44-
0.65 |
|
|
|
|
|
415 |
205 |
20 |
45 |
|
121-174 |
| F12 CL2 |
0.10-
0.20 |
0.30-
0.80 |
0.04 |
0.04 |
0.10-
0.60 |
0.80-
1.25 |
|
0.44-
0.65 |
|
|
|
|
|
485 |
275 |
20 |
30 |
|
143-207 |
| F11 CL1 |
0.05-
0.15 |
0.30-
0.60 |
0.03 |
0.03 |
0.50-
1.00 |
1.00-
1.50 |
|
0.44-
0.65 |
|
|
|
|
|
415 |
205 |
20 |
45 |
|
121-174 |
| F11 CL2 |
0.10-
0.20 |
0.30-
0.80 |
0.04 |
0.04 |
0.50-
1.00 |
1.00-
1.50 |
|
0.44-
0.65 |
|
|
|
|
|
485 |
275 |
20 |
30 |
|
143-207 |
| F11 CL3 |
0.10-
0.20 |
0.30-
0.80 |
0.04 |
0.04 |
0.50-1.00 |
1.00-
1.50 |
|
0.44-
0.65 |
|
|
|
|
|
515 |
310 |
20 |
30 |
|
156-207 |
| F22 CL1 |
0.05-
0.15 |
0.30-
0.60 |
0.04 |
0.04 |
0.5 |
2.00-
2.50 |
|
0.87-
1.13 |
|
|
|
|
|
415 |
205 |
20 |
35 |
|
170 |
| F22 CL3 |
0.05-
0.15 |
0.30-
0.60 |
0.04 |
0.04 |
0.5 |
2.00-
2.50 |
|
0.87-
1.13 |
|
|
|
|
|
515 |
310 |
20 |
30 |
|
156-207 |
| F5 |
0.15 |
0.30-
0.60 |
0.03 |
0.03 |
0.5 |
4.0-
6.0 |
|
0.44-
0.65 |
0.5 |
|
|
|
|
485 |
275 |
20 |
35 |
|
143-217 |
| F5a |
0.25 |
0.6 |
0.04 |
0.03 |
0.5 |
4.0-
6.0 |
|
0.44-
0.65 |
0.5 |
|
|
|
|
620 |
450 |
22 |
50 |
|
187-248 |
| F321 |
0.08 |
2 |
0.045 |
0.03 |
1 |
≥17.0 |
|
|
9.00-
12.00 |
|
|
5C%-
0.70 |
|
515 |
205 |
30 |
50 |
|
|
| F304 |
0.08 |
2 |
0.045 |
0.03 |
1 |
18.00-
20.00 |
|
|
8.00-
11.00 |
|
|
|
|
515 |
205 |
30 |
50 |
|
|
| F304L |
0.035 |
2 |
0.045 |
0.03 |
1 |
18.00-
20.00 |
|
|
8.00-
13.00 |
|
|
|
|
485 |
170 |
30 |
50 |
|
|
| F316 |
0.08 |
2 |
0.045 |
0.03 |
1 |
16.00-
18.00 |
|
2.00-
3.00 |
10.00-
14.00 |
|
|
|
|
515 |
205 |
30 |
50 |
|
|
| F316L |
0.035 |
2 |
0.045 |
0.03 |
1 |
16.00-
18.00 |
|
2.00-3.00 |
10.00-
15.00 |
|
|
|
|
485 |
170 |
30 |
50 |
|
|