Material reference
ASTM STEEL SPECIFICATION FOR ANSI, ASME, ASA FLANGES
Standard material requirement tables for forged steel flange purchasing, inspection documents and material review.
Standard material tables
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Data tables
Reference tables
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ASTM material specifications for ASME/ANSI flanges
| ASTM specification | Grade / class | Classification |
|---|---|---|
| A105 | - | Carbon steel |
| A181 | Class 60 | Carbon steel |
| A181 | Class 70 | Carbon steel |
| A182 | F1 | 1/2Mo alloy steel |
| A182 | F5 | 5Cr-1/2Mo alloy steel |
| A182 | F5a | 5Cr-1/2Mo alloy steel |
| A182 | F11 Class 1 | 1-1/4Cr-1/2Mo alloy steel |
| A182 | F11 Class 2 | 1-1/4Cr-1/2Mo alloy steel |
| A182 | F11 Class 3 | 1-1/4Cr-1/2Mo alloy steel |
| A182 | F12 Class 1 | 1Cr-1/2Mo alloy steel |
| A182 | F12 Class 2 | 1Cr-1/2Mo alloy steel |
| A182 | F11 | 1-1/4Cr-1/2Mo alloy steel |
| A182 | F12 | 1Cr-1/2Mo alloy steel |
| A182 | F22 | 2-1/4Cr-1Mo alloy steel |
| A182 | F304 | 18Cr-8Ni stainless steel |
| A182 | F304L | Low-carbon 18Cr-8Ni stainless steel |
| A182 | F316 | 18Cr-12Ni-2Mo stainless steel |
| A182 | F316L | Low-carbon 18Cr-12Ni-2Mo stainless steel |
| A182 | F321 | Titanium-stabilized 18Cr-10Ni stainless steel |
| A182 | F347 | Niobium-stabilized 18Cr-10Ni stainless steel |
| A350 | LF1 | Carbon steel for low-temperature service |
| A350 | LF2 | Carbon steel for low-temperature service |
| A350 | LF3 | 3-1/2Ni steel for low-temperature service |
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