ASTM A694 Standard
ASTM A694 / A694M - 08 specification covers forged or rolled steel pipe flanges, forged fittings, valves, and parts suitable for use with high-strength transmission-service pipe. Included are flanges, fittings, and similar parts ordered either to dimensions specified by the purchaser or to ASME or MSS dimensional standards.
Supplementary Requirements are provided. Supplementary Requirement S 1 is provided for use when purchaser approval is required for repair welding.
This specification is expressed in both inch-pound units and in SI units. However, unless the order specifies the applicable “M” specification designation (SI units), the material shall be furnished to inch-pound units.
The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
Element | Heat Analysis | Product Analysis |
Carbon, max | 0.26 | 0.265 |
Manganese, max | 1.60 | 1.64 |
Phosphorus, max | 0.025 | 0.030 |
Sulfur, max | 0.025 | 0.030 |
Silicon | 0.15-0.35 | 0.10-0.40 |
Grade | Yield Strength (0.2 % Offset), min, ksi [MPa] |
Tensile Strength min, ksi [MPa] |
Elongation in 2 in. or 50 mm, min % |
F42 | 42 [290] | 60 [415] | 20 |
F46 | 46 [315] | 60 [415] | 20 |
F48 | 48 [330] | 62 [425] | 20 |
F50 | 50 [345] | 64 [440] | 20 |
F52 | 52 [360] | 66 [455] | 20 |
F56 | 56 [385] | 68 [470] | 20 |
F60 | 60 [415] | 75 [515] | 20 |
F65 | 65 [450] | 77 [530] | 20 |
F70 | 70 [485] | 82 [565] | 18 |