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While the term alloy steel could even apply to stainless steel grades, the ASTM specification or ANSI standard used to produce the Alloy Steel Flanges would give the buyer details regarding the chemistry details of these products. Several ANSI/ ASME standards use materials that are forged or cast to produce Cast AS Blind Flanges. Although blind flanges and certain reducing flanges could include plate as a material for construction. This being said, alloys like Chrome Moly Flanges exhibit better corrosion resistance properties. Especially in those environments where the components are susceptible to getting corroded by oxidation or by general corrosion. Molybdenum present in Alloy Steel Lap Joint Flange gives these components some degree of resistance to crevice corrosion and pitting, especially in those environments that contain both chlorides and sulphur.
Many industries prefer using Alloy Steel Flanges over carbon steel flanges because they offer much more in terms of properties i.e. durability, better resistance to corrosion as well as better performance.
Alloy steels are classified into two categories, high alloy steel and low alloy steels. While Low Alloy Steel Flanges contain about 0.05 – 0.25% of carbon along with up to 2.0% manganese. Low alloy steels contain trace quantities of alloyants such as niobium, nitrogen, vanadium, copper, nickel, chromium, titanium, calcium, molybdenum, rare earth elements, or zirconium. In order to strengthen the Chromium AS Flanges, its alloy has added elements i.e. Copper, titanium, vanadium, and niobium.
| Specification : | Alloy Steel Flanges |
| Pressure Rating Table: | Class 150 LBS Flanges, Class 300 LBS Flanges, Class 600 LBS Flanges, Class 900 LBS Flanges, Class 1500 LBS Flanges, Class 2500 LBS Flanges |
| Connect Type Type: | LJF, RF, FF, RTJ, LMF, SMF |
| Design For Size: | EN Flanges, ASA Flanges, ASME Flanges, DIN Flanges, JIS Flanges, ANSI Flanges, BS Flanges, PN Flanges |
| Flange Machining Equipment: | Bending machine, Pushing Machine, Sand-blasting machine, Press machine, electric bevelling machine etc |
| Alloy Steel Flanges Standards: | PN Flanges, JIS Flanges, ISO Flanges, GOST Flanges, UNI Flanges, AWWA Flanges, MSS SP44 Flanges, ASME B16.38 Flanges, EN-1092 Flanges, BS10 Flanges, DIN Flanges, ASME B16.5 Flanges, ASME B16.47 (Series A, Series B) Flanges |
| Size Chart : | 1/2″ (15 NB) To 48″ (1200NB) |
| Production Process: | Forged, Heat Treated and Machined |
| Coating Flange Faces : | Cold and Hot Dip Galvanized, Anti-rust Paint, Zinc Plated, Yellow Transparent, Oil Black Paint |
| Supporting Flange Material: | Gasket, Ring Joint, Flange Bolts |
| Common Types of Flange : | Flanges 150 LB WNRF Class 300 RTJ 600# BLRF Class 900 SORF |
| Application: | Chemical Industry Natural Gas Industry Nuclear Power Plant Fabrication Industry Water Pipeline Industry Oil And Gas Industry |
| Material Group | Common Name | Type | UNS | Forging Spec. | Casting Spec. Equivalent | DIN | DIN W. No | Application |
|---|---|---|---|---|---|---|---|---|
| Low AS | Moly Steel | C-1/2Mo | K12822 | A182-F1 cl2 | A217-WC1 | 15M03 | 1.5415 | Up to 470ºC* (875ºF) |
| AS Chrome Moly | 1.1/4Cr-1/2Mo | K11572 | AS A182-F11 cl2 | A217-WC6 | 13CRM044 | 1.7335 | Up to 593ºC (1100ºF) | |
| 2.1/4Cr-1Mo | K21590 | AS A182-F22 cl3 | A217-WC9 | 10CRM0910 | 1.7380 | Up to 593ºC (1100ºF), HP steam | ||
| 5Cr-1/2Mo | K41545 | AS A182-F5/F5a | A217-C5 | 12CRMO195 | 1.7362 | High temp refinery service | ||
| 9Cr-1Mo | K90941 | AS A182-F9 | A217-C12 | X 12 CrMo 9 1 | 1.7386 | High temp erosive refinery service | ||
| 9Cr-1Mo-V | AS A182-F91 | A217-C12A | X 10 CrMoVNb 9 1 | 1.4903 | High pressure steam |
| Dimension Standards | Size Range | Ratings |
|---|---|---|
| Alloy Steel Socket Weld Flanges | 1/2" to 24" | 150# to 2500# |
| Low Alloy Steel Lapped joint Flanges | 1" TO 24" | 300# TO 2500# |
| High Alloy steel flange material | 26" TO 48" | 150# TO 600# |
| Chromium Alloy Steel lap joint flange | 12" TO 60" | 150# to 900# |
| Cast ASTM A182 Alloy Steel WNRF Flanges | 26" TO 60" | - |
| Chrome Alloy Steel RTJ Flange | 2 1/6" TO 30" | 2000 PSI TO 20000 PSI |
| Chromoly Alloy Steel Grade Flat Flange | 1/2" TO 24" | 150# TO 2500# |
| Scm420 Chromoly Alloy Steel Slip On Flanges | DN10 TO DN3600 | PN6 TO PN160 |
| ANSI/ASME B16.34 | ANSI PRESSURE RATING | ||||||
| Temperature °F | AS Class 150 | AS Class 300 | AS Class 400 | AS Class 600 | AS Class 900 | AS Class 1500 | AS Class 2500 |
| -20 to 100 | 265 | 695 | 925 | 1390 | 2085 | 3470 | 5785 |
| 200 | 260 | 680 | 905 | 1360 | 2035 | 3395 | 5660 |
| 300 | 230 | 655 | 870 | 1305 | 1955 | 3260 | 5435 |
| 400 | 200 | 640 | 855 | 1280 | 1920 | 3200 | 5330 |
| 500 | 170 | 620 | 830 | 1245 | 1865 | 3105 | 5180 |
| 600 | 140 | 605 | 805 | 1210 | 1815 | 3025 | 5040 |
| 650 | 125 | 590 | 785 | 1175 | 1765 | 2940 | 4905 |
| 700 | 110 | 570 | 755 | 1135 | 1705 | 2840 | 4730 |
| 750 | 95 | 530 | 710 | 1065 | 1595 | 2660 | 4430 |
| 800 | 80 | 510 | 675 | 1015 | 1525 | 2540 | 4230 |
| 850 | 65 | 485 | 650 | 975 | 1460 | 2435 | 4060 |
| 900 | 50 | 450 | 600 | 900 | 1350 | 2245 | 3745 |
| 950 | 35 | 280 | 375 | 560 | 845 | 1405 | 2345 |
| 1000 | 20 | 165 | 220 | 330 | 495 | 825 | 1370 |
| 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 | – | – | – | – |
| VANDIUM MAX | – | – | – | – |
| 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 |
| Grade | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|
| Alloy Steel A182 F1 | 275 | 485 | 20 % |
| Alloy Steel A182 F5 | 275 | 485 | 20 % |
| Alloy Steel A182 F9 | 380 | 585 | 20 % |
| Alloy Steel A182 F11 | 205 | 415 | 20 % |
| Alloy Steel A182 F12 | 275 | 485 | 20 % |
| Alloy Steel A182 F22 | 205 | 415 | 20 % |
| Alloy Steel A182 F91 | 380 | 585 | 20 % |
| FORGING SPECIFICATION | COMMON DESIGNATION | MATERIAL SUFFIX | WROUGHT BAR SPECIFICATION | SERVICE RECOMMENDATIONS | COMMON API TRIM # FOR THIS BASE MATERIAL | |
|---|---|---|---|---|---|---|
| 150 TO 600 # | 900 TO 2500 # | |||||
| AS A182 F1 | C-1/2 Mo Low Alloy Steel | ASTM A217 Grade WC1 | A182 F1 Class 1 | Non-corrosive applications Including water, oil and gases at temperatures between: -29 ~ 593ºC* (Not prolonged use > 470ºC). | 8 8A 12/12A | 5/5A 12 16 |
| AS A182 F2 | 0.75% Ni; Mo; 0.75% Cr Low Alloy Steel | ASTM A217 Grade WC5 | A182 F2 | Non-corrosive applications including water, oil and gases at temperatures F2:-29ºC ~ 538ºC, WC5: -29ºC ~ 575ºC | 8 8A 12/12A | 5/5A 12 16 |
| AS A182 F11 | 1 1/4% Chrome; 1/2% Moly Low Alloy Steel | ASTM A217 Grade WC6 | A182 F11 Class 2 | Non-corrosive applications including water, oil and gases at temperatures between -30ºC (-20ºF) and +593ºC (+1100ºF). | 8 8A 12/12A | 5/5A 12 16 |
| AS A182 F22 | 2 1/4% Chrome Low Alloy Steel | ASTM A217 Grade WC9 | A182 F22 Class 3 | Non-corrosive applications including water, oil and gases at temperatures between -30ºC (-20ºF) and +593ºC (+1100ºF). | 8 8A 12/12A | 5/5A 12 16 |
| AS A182 F5/F5a | 5% Chrome; 1/2% Moly, Medium Alloy Steel | ASTM A217 Grade C 5 | A182 F5/F5a | Mild corrosive or erosive applications as well as non-corrosive applications at temperatures between -30ºC (-20ºF) and +650ºC (+1200ºF). | 8 8A 12/12A | 5/5A 12 16 |
| AS A182 F9 | 9% Chrome; 1% Moly, Medium Alloy Steel | ASTM A217 Grade C12 | A182 F9 | Mild corrosive or erosive applications as well as non-corrosive applications at temperatures between -30ºC (-20ºF) and +650ºC (+1200ºF). | 8 8A 12/12A | 5/5A 12 16 |
| AS A182 F91 | 9% Chrome; 1% Moly; V-N, Medium Alloy Steel | ASTM A217 Grade C12-A | A182 F91 | Mild corrosive or erosive applications as well as non-corrosive applications at temperatures between -30ºC (-20ºF) and +650ºC (+1200ºF). | 8 8A 12/12A | 5/5A 12 16 |
| NPS | Flange (ID) (inch) |
Flange (OD) (inches) |
||||
| 150 LB | 300 LB | 400 LB | 600 LB | 900 LB | ||
| 1/2 | 0.84 | 1.875 | 2.125 | 2.125 | 2.125 | 2.50 |
| 3/4 | 1.06 | 2.25 | 2.625 | 2.625 | 2.625 | 2.75 |
| 1 | 1.31 | 2.625 | 2.875 | 2.875 | 2.875 | 3.125 |
| 1 1/4 | 1.66 | 3 | 3.25 | 3.25 | 3.25 | 3.50 |
| 1 1/2 | 1.91 | 3.375 | 3.75 | 3.75 | 3.75 | 3.875 |
| 2 | 2.38 | 4.125 | 4.375 | 4.375 | 4.375 | 5.625 |
| 2 1/2 | 2.88 | 4.875 | 5.125 | 5.125 | 5.125 | 6.50 |
| 3 | 3.50 | 5.375 | 5.875 | 5.875 | 5.875 | 6.625 |
| 4 | 4.50 | 6.875 | 7.125 | 7.00 | 7.625 | 8.125 |
| 5 | 5.56 | 7.75 | 8.50 | 8.375 | 9.50 | 9.75 |
| 6 | 6.62 | 8.75 | 9.875 | 9.75 | 10.50 | 11.375 |
| 8 | 8.62 | 11 | 12.125 | 12.00 | 12.625 | 14.125 |
| 10 | 10.75 | 13.375 | 14.25 | 14.125 | 15.75 | 17.125 |
| 12 | 12.75 | 16.125 | 16.625 | 16.50 | 18.00 | 19.625 |
| Standard | Class | Dia. | Bolt Circle Dia. | No. of Bolts | Bolt Size | Dia. of Bolt Hole |
|---|---|---|---|---|---|---|
| Alloy 4087 Flange | PN14 Flange | 95 | 67 | 4 | M12 | 14 |
| Alloy 2129 Flange | Table C Flange | 95 | 67 | 4 | 13 | 14 |
| Table D Flange | 95 | 67 | 4 | 13 | 14 | |
| Table E Flange | 95 | 67 | 4 | 13 | 14 | |
| Table F Flange | 95 | 67 | 4 | 13 | 14 | |
| Table H Flange | 114 | 83 | 4 | 16 | 17 | |
| Table J Flange | 114 | 83 | 4 | 16 | 17 | |
| ANSI B16.5 Flange | ANSI 150 Flange | 89 | 60 | 4 | 13 | 16 |
| ANSI 300 Flange | 95 | 67 | 4 | 13 | 16 | |
| ANSI 600 Flange | 95 | 67 | 4 | 13 | 16 | |
| ANSI 900 Flange | 121 | 83 | 4 | 19 | 22 | |
| ANSI 1500 Flange | 121 | 83 | 4 | 19 | 22 | |
| ISO 7005 (DIN) Flange | PN6 Flange | 80 | 55 | 4 | M10 | 11 |
| PN10 Flange | 95 | 65 | 4 | M12 | 14 | |
| PN16 Flange | 95 | 65 | 4 | M12 | 14 | |
| PN20 Flange | 90 | 60.5 | 4 | M14 | 16 | |
| PN25 Flange | 95 | 65 | 4 | M12 | 14 | |
| PN40 Flange | 95 | 65 | 4 | M12 | 14 |
