ASTM A105 Flange
SSM supplies Carbon Steel Forged ASTM A105 Flanges
Carbon Steel Forged ASTM A105 Flanges
Carbon steel forged ASTM A105 flanges provided by SSM are made of carbon steel forgings with excellent mechanical properties and toughness. These flanges are commonly used in high-temperature and high-pressure piping systems. They comply with ANSI/ASME standards, such as ANSI B16.5 and ANSI B16.47, in terms of specifications and dimensions.
SSM provides product parameters as shown in the following table:
| Types | WN/LWN/SO/SW/Blind/Lap Joint Flange … |
| Class | 150#-2500# / PN6-PN100 |
| Size | 1/2″-48″ / DN10-DN1000 |
| Sealing Surface | RF FF RTJ TF GF LF LM |
| Coating | Vanish, yellow paint, anti-rust oil, galvanizing etc |
| Standard | ASME B16.5 / ASME B16.47 / DIN / EN1092-1:2002 / BS 4504 BS 10 TableD/E … |
| Material | ASTM /ASME A/SA105(N) |
Chemical Composition & Mechanical Properties
ASTM A105 flanges are forged carbon steel pipe components used for high-temperature and high-pressure service. Below are the detailed chemical composition and mechanical properties of ASTM A105 flanges.
| Element | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Copper (Cu) | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) |
| Composition (%) | ≤ 0.35% | 0.60 – 1.05% | ≤ 0.035% | ≤ 0.040% | ≤ 0.40% | ≤ 0.40% | ≤ 0.40% | ≤ 0.30% | ≤ 0.12% | ≤ 0.08% |
| Property | Tensile Strength | Yield Strength | Elongation | Reduction of Area | Hardness |
| Value | ≥ 485 MPa (70,000 psi) | ≥ 250 MPa (36,000 psi) | ≥ 22% | ≥ 30% | 187 HB max |
Advantages and Disadvantages of ASTM A105
The advantages of ASTM A105 include high strength, good ductility, and wide application in oil and gas, chemical processing, power generation, and general industrial uses. ASTM A105 flanges are generally more economical than alloy or stainless steel flanges. ASTM A105 carbon steel flange has good weldability.
However, there are some disadvantages to consider, such as poor corrosion resistance, making the flange unsuitable for all chemicals and process fluids. Additionally, additional protective coatings or treatments (such as galvanizing and painting) may be required in corrosive environments. Furthermore, the impact toughness of ASTM A105 flanges may be significantly reduced at low temperatures.
Applications of ASTM A105 Flange
- Oil and Gas
- Chemical Industry
- Power Generation
- Shipbuilding
- General Industry
What is the difference between 105 and 105N?
Adding an “N” after A105 denotes “Normalized.” Normalizing is a heat treatment process that involves heating the material to a specific temperature, holding it for a certain duration, and then cooling it in the air. This treatment is effective in enhancing the material’s toughness, uniformity, and mechanical properties, as well as reducing residual stress.
ASTM A105N flange manufacturing process
One of our long-term customers frequently requests customized ASTM A105N large flanges from us. Now, we will demonstrate the production process of this flange. You are welcome to purchase flanges made of this material.
Step 1: Material Selection
Material: ASTM carbon steel is mainly used, with specific restrictions to ensure the required mechanical properties. The material must meet the ASTM specification for quality and consistency.
Step 2: Forging
Heating: The steel is heated to a high temperature to make it plastic. This is usually done in a forge or heating furnace.
Forging process: The heated steel is forged into a rough flange shape by a hydraulic press or hammer. This process helps to align the grain structure and eliminate internal defects.
Step 3: Machining
Rough machining: The forged flange is machined to close the size, including turning, drilling, and milling.
Step 4: Heat Treatment
The flanges are heat treated in a controlled furnace for normalizing, which involves heating the steel to a temperature above its critical range and cooling it in air. This process improves the steel’s mechanical properties, such as tensile strength, toughness, and uniformity, and eliminates internal stresses from forging and machining.
Step 5: Finishing
Further finishing is done to exact specifications, including bolt holes, flange faces, and outside diameters.
Step 6: Inspection and Testing
Visual Inspection: The flanges are inspected for surface defects and dimensional accuracy.
Nondestructive Testing: Techniques such as ultrasonic testing or radiographic testing may be used to detect internal defects.
Mechanical Testing: Tests such as tensile, impact, and hardness testing ensure that the flanges meet the required mechanical properties.
Step 7: Surface Treatment
The flanges may undergo shot peening or coating to improve appearance and corrosion resistance. They are cleaned to remove residues from the machining and heat treatment processes.
Step 8: Marking
The flange is marked as per specification or customer requirements.
Step 9: Certification and Packaging
Each flange is accompanied by a certificate of conformity detailing its materials and test results. The finished flanges are carefully packaged to prevent damage during transport and handling.
Summary
The manufacturing process of ASTM A105N flanges involves material selection, forging, machining, normalizing, inspection, finishing, and packaging. Each step is crucial to ensure that the flanges meet the stringent requirements of ASTM A105N specifications and are suitable for high-temperature and high-pressure applications.
We have significant product advantages in manufacturing A105 flanges, especially large-sized flanges. Whether it’s quality or price, we will meet your needs.
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