SEAMLESS PIPES FOR HIGH TEMPERATURE SERVICE
Pipes for high temperature sevice are made from low carbon steel with addition of Cr and Mo to improve heat reistance properities.
| RANGE OF APPLICATION |
| NOMINAL COMPOSITION | PLATES | PIPES | FITTINGS | FLANGES AND FORGED VALVES MAX TEMPERATURE OF SERVICE | |
| 0.5Mo | SA/A204Gr.A/B | SA/A335Gr.P1 | SA/A234WP1 | SA/A182F1 | 470°C |
| 1.0Cr-0.5Mo | SA/A387Gr.12 | SA/A335Gr.P12 | SA/A234WP12 | SA/A182F12 | 565°C |
| 1.25Cr-0.5Mo | SA/A387Gr.11 | SA/A335Gr.P11 | SA/A234WP11 | SA/A182F11 | 565°C |
| 2.25Cr-1.0Mo | SA/A387Gr.22 | SA/A335Gr.P22 | SA/A234WP22 | SA/A182F22 | 593°C |
| 5.0Cr-0.5Mo | SA/A387Gr.5 | SA/A335Gr.P5 | SA/A234WP5 | SA/A182F5 | 600°C |
| 9.0Cr-1.0Mo | SA/A387Gr.9 | SA/A335Gr.P9 | SA/A234WP9 | SA/A182F9 | 650°C |
| MECHANICAL PROPERTIES AND CHEMICAL ANALYSIS OF THE MOST USED STEEL GRADES |
| TENSILE REQUIREMENTS | CHEMICAL REQUIREMENTS | |||||||||||
| STEEL GRADE | TS | YS psi |
C % |
Mn % |
Si % |
P % |
S % |
Cr % |
Ni % |
Mo % |
Cu % |
V % |
| ASTM A 106-A ASME SA |
48,000 | 30,000 | <0.25 = |
0.27÷0.93 | >0.10 = |
<0.035 = |
>0.035 = |
<0.40 = |
<0.40 = |
>0.15 = |
<0.40 = |
<0.008 = |
| ASTM A 106-B ASME SA |
60,000 | 35,000 | <0.30 = |
0.29÷1.06 | >0.10 = |
>0.035 = |
>0.035 = |
<0.40 = |
<0.40 = |
>0.15 = |
<0.40 = |
<0.80 = |
| ASTM A 106-C ASME SA |
70,000 | 40,000 | <0.35 = |
0.29÷1.06 | >0.10 = |
<0.035 = |
>0.035 = |
<0.40 = |
<0.40 = |
>0.15 = |
<0.40 = |
<0.80 = |
| UNI 5462-C 14 | (35÷45) | (>24) = |
<0.17 = |
>0.40 = |
0.10÷0.35 | <0.035 = |
>0.035 = |
----- | ----- | ----- | ---- | ----- |
| UNI 5462-C 18 | (45÷55) | (>26) = |
<0.21 = |
>0.50 = |
0.10÷0.35 | <0.035 = |
>0.035 = |
----- | ----- | ----- | ---- | ---- |
| ASTM A 335-P1 (*) ASME SA |
55,000 | 30,000 | 0.10÷0.20 | 0.30÷0.80 | 0.10÷0.50 | <0.025 = |
>0.025 = |
----- | ----- | 0.44÷0.65 | ---- | ---- |
| ASTM A 335-P2 ASME SA |
55,000 | 30,000 | 0.10÷0.20 | 0.30÷0.61 | 0.10÷0.30 | <0.025 = |
>0.025 = |
0.50÷0.81 | ----- | 0.44÷0.65 | ---- | ---- |
| ASTM A 335-P5 (*) ASME SA |
60,000 | 30,000 | <0.15 = |
0.30÷0.60 | >0.50 = |
<0.025 = |
>0.025 = |
4.00÷6.00 | ----- | 0.44÷0.65 | ---- | ---- |
| ASTM A 335-P5b ASME SA |
60,000 | 30,000 | <0.15 = |
0.30÷0.60 | 1.00÷2.00 | <0.025 = |
>0.025 = |
4.00÷6.00 | ----- | 0.44÷0.65 | ---- | ---- |
| ASTM A 335-P5c ASME SA |
60,000 | 30,000 | <0.12 = |
0.30÷0.60 | >0.50 = |
<0.025 = |
>0.025 = |
4.00÷6.00 | ----- | 0.44÷0.65 | ---- | ---- |
| ASTM A 335-P9 (*) ASME SA |
60,000 | 30,000 | <0.15 = |
0.30÷0.60 | 0.25÷1.00 |
<0.025 = |
>0.025 = |
8.00÷10.00 | ---- | 0.90÷1.10 | ---- | ---- |
| ASTM A 335-P11 (*) ASME SA |
60,000 | 30,000 | 0.05÷0.15 | 0.30÷0.60 | 0.25÷1.00 | <0.025 = |
>0.025 = |
1.00÷1.50 | ---- | 0.44÷0.65 | ---- | ---- |
| ASTM A 335-P12 ASME SA |
60,000 | 30,000 | 0.05÷0.15 | 0.30÷0.61 | >0.50 = |
<0.025 = |
>0.025 = |
0.80÷1.25 | ---- | 0.44÷0.65 | ---- | ---- |
| ASTM A 335-P21 ASME SA |
60,000 | 30,000 | 0.05÷0.15 | 0.30÷0.60 | >0.50 = |
<0.025 = |
>0.025 = |
2.65÷3.35 | ---- | 0.80÷1.06 | ---- | ---- |
| ASTM A 335-P22 (*) ASME SA |
60,000 | 30,000 | 0.05÷0.15 | 0.30÷0.60 | >0.50 = |
<0.025 = |
>0.025 = |
1.90÷2.60 | ---- | 0.87÷1.13 | ---- | ---- |
| ASTM A 335-P91 ASME SA |
85,000 | 60,000 | 0.08÷0.12 | 0.30÷0.60 | 0.20÷0.50 | <0.020 = |
>0.010 = |
8.00÷9.50 | <0.40 = |
0.85÷1.05 | ---- | 0.18÷0.25 |
| UNI 5462 16Mo5 |
(45÷55) | (>29) = |
0.12÷0.20 | 0.50÷0.80 | 0.15÷0.35 | <0.035 = |
>0.035 = |
---- | 0.45÷0.65 | ---- | ---- | |
| UNI 5462 14CrMo3 |
(45÷58) | (>30) = |
0.10÷0.18 | 0.40÷0.70 | 0.15÷0.35 | <0.035 = |
>0.035 = |
0.7÷1.0 | ---- | 0.45÷0.65 | ---- | ---- |
| UNI 5462 12CrMo910 |
(45÷60) | (>27) = |
<0.15 = |
0.40÷0.60 | 0.15÷0.50 | <0.035 = |
>0.035 = |
2.0÷2.5 | ---- | 0.9÷1.1 | ---- | ---- |