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alloy flange materials (chrome-moly) have higher chrome and molybdenum content than carbon steel flanges. alloy steel flange materials suit high temperature and high-pressure applications and improved resistance to corrosion when compared to regular carbon steel flanges grades.
astm a182 alloy flanges are extremely ductile, strong and tough and easy to weld and offer oxidation and scaling resistance. these grades match with astm a335 alloy steel pipes.
chemical composition astm a182 f5, f9, f11, f22
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 | – | – | – | – |
mechanical properties a182
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 |
h
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