ASTM A694 Standard

ASTM A694 Fittings

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.

Chemical Composition (%) of ASTM A694
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
Mechanical Properties of ASTM A694
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
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