High-Performance ASTM A694 F70 Flanges – Corrosion-Resistant & Low-Temperature Toughness

SSM proudly supplies ASTM A694 F70 Flanges, engineered for demanding high-pressure oil, gas, and petrochemical applications. These flanges combine exceptional strength, superior corrosion resistance, and excellent low-temperature performance, making them ideal for pipelines and pressure vessels in challenging environments.

Material Specifications

Base Material: ASTM A694 F70, a high-strength low-alloy (HSLA) carbon steel.
Chemical Composition (Typical):

Carbon (C): 0.16–0.21%

Manganese (Mn): 0.70–1.00%

Phosphorus (P): ≤0.035%

Sulfur (S): ≤0.030%

Silicon (Si): 0.15–0.35%

Chromium (Cr): 0.50–0.90%

Nickel (Ni): 0.40–0.70%

Molybdenum (Mo): 0.15–0.25%

This composition ensures the flanges maintain high tensile strength and excellent resistance to sulfide stress cracking (SSC), particularly in sour environments.

Mechanical Properties

ASTM A694 F70 flanges are designed for high-performance operations:

Minimum Yield Strength: 70 ksi

Minimum Tensile Strength: 100 ksi

Elongation: ≥20%

Impact Toughness: Excellent at sub-zero temperatures, suitable for low-temperature pipelines

These mechanical properties guarantee durability, safety, and reliability under extreme pressure and temperature conditions.

Flange Types & Standards

SSM offers ASTM A694 F70 flanges in a wide range of types and dimensions to meet various project requirements:

Types: Weld Neck (WN), Slip-On (SO), Blind (BL), Socket Weld (SW), Lap Joint (LJ)

Standards Compliance: ASME B16.5, ASME B16.47, API 6A, and API 605

Pressure Ratings: 150# to 2500#

Applications

ASTM A694 F70 flanges are widely used in:

High-pressure oil and gas pipelines

Offshore and onshore petrochemical plants

Refineries and chemical processing units

Low-temperature or sour service pipelines

Their superior sulfide resistance and low-temperature toughness make them ideal for extreme environments.

Why Choose SSM

SSM guarantees:

High-quality ASTM A694 F70 flanges with full certification

Custom machining according to project specifications

Extensive stock in carbon steel flanges for fast delivery

Professional support for selection, handling, and installation

Optimize your pipeline projects with SSM ASTM A694 F70 flanges-engineered for strength, safety, and durability in the most challenging conditions.

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