Alloy Steel Technical Information
ASTM A182 Alloy Steel Flange Recommended Services
| ASTM A182 ALLOY STEEL FLANGES | TRADE DESIGNATION | RECOMMENDED SERVICE |
|---|---|---|
| ASTM A182 Alloy Steel F1 | C-1/2 Mo Low Alloy Steel | Non-corrosive applications Including water, oil, and gases at temperatures between -29 ~ 593ºC* (Not prolonged use > 470ºC). |
| ASTM A182 Alloy Steel F2 | 0.75% Ni; Mo; 0.75% Cr Low Alloy Steel | Non-corrosive applications including water, oil, and gases at temperatures F2:-29ºC ~ 538ºC, WC5: -29ºC ~ 575ºC |
| ASTM A182 Alloy Steel F11 | 1 1/4% Chrome; 1/2% Moly Low Alloy Steel | Non-corrosive applications including water, oil, and gases at temperatures between -30ºC (-20ºF) and +593ºC (+1100ºF). |
| ASTM A182 Alloy Steel F22 | 2 1/4% Chrome Low Alloy Steel | Non-corrosive applications including water, oil, and gases at temperatures between -30ºC (-20ºF) and +593ºC (+1100ºF). |
| ASTM A182 Alloy Steel F5/F5a | 5% Chrome; 1/2% Moly, Medium Alloy Steel | Mild corrosive or erosive applications as well as non-corrosive applications at temperatures between -30ºC (-20ºF) and +650ºC (+1200ºF). |
| ASTM A182 Alloy Steel F9 | 9% Chrome; 1% Moly, Medium Alloy Steel | Mild corrosive or erosive applications as well as non-corrosive applications at temperatures between -30ºC (-20ºF) and +650ºC (+1200ºF). |
| ASTM A182 Alloy Steel F91 | 9% Chrome; 1% Moly; V-N, Medium Alloy Steel | Mild corrosive or erosive applications as well as non-corrosive applications at temperatures between -30ºC (-20ºF) and +650ºC (+1200ºF). |
Alloy Steel Chemical Composition
| ELEMENT & PROPERTIES | LOW ALLOY STEEL | MEDIUM ALLOY STEEL | ||
|---|---|---|---|---|
| F11 CL2 | F22 CL3 | F5 | F9 | |
| CARBON | 0.10-0.20 | 0.05-0.15 | 0.15 MAX | 0.15 MAX |
| MANGANESE | 0.30-0.80 | 0.30-0.60 | 0.30-0.60 | 0.30-0.60 |
| PHOSPHORUS MAX | 0.040 | 0.040 | 0.03 | 0.030 |
| SULFUR MAX | 0.040 | 0.040 | 0.03 | 0.030 |
| SILICON | 0.50-1.00 | 0.50 MAX | 0.50 MAX | 0.50-1.00 |
| NICKEL MAX | – | – | 0.50 | – |
| CHROMIUM | 1.00-1.50 | 2.00-2.50 | 4.00-6.00 | 8.0-10.0 |
| MOLYBDENUM | 0.44-0.65 | 0.87-1.13 | 0.44-0.65 | 0.90-1.10 |
| OPPER MA | – | – | – | – |
| COLUMBIUM MAX | – | – | – | – |
| VANADIUM MAX | – | – | – | – |
Alloy Steel Mechanical Properties
| ELEMENT & PROPERTIES | LOW ALLOY STEEL | MEDIUM ALLOY STEEL | ||
|---|---|---|---|---|
| F11 CL2 | F22 CL3 | F5 | F9 | |
| TENSILE STRENGTH PSI (MPA) | 70,000 (485) | 75,000 (515) | 70,000 (485) | 85,000 (585) |
| YIELD STRENGTH PSI MIN | 40,000 (275) | 45,000 (310) | 40,000 (275) | 55,000 (380) |
| ELONGATION 2” % MIN | 20 | 20 | 20 | 20 |
| REDUCTION AREA % MIN | 30 | 30 | 35 | 40 |
| HARDNESS (HB) MAX* | 143 ~ 207 | 156 ~ 207 | 143 ~ 217 | 179 ~ 217 |