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)

Astm a105 covers forged carbon steel piping components for ambient- and higher-temperature service in pressure systems.

Included are flanges, fittings, valves, and similar parts ordered either to dimensions specified by the purchaser or to dimensional standards such as the MSS, ASME, and API specifications.

Forgings made to this specification are limited to a maximum weight of 10 000 lb [4540 kg].

Chemical Requirements

NOTE 1—For each reduction of 0.01 % below the specified carbon maximum (0.35 %), an increase of 0.06 % manganese above the specified maximum (1.05 %)will be permitted up to a maximum of 1.65 %.

Element	Composition,%
Carbon	0.35 max
Manganese	0.60 -1.05
Phosphorus	0.035 max
Sulfur	0.040 max
Silicon	0.10-0.35
Copper	0.40 max【A】
Nickel	0.40 max
Chromium	0.30 max【A.B】
Molybdenum	0.12 max【A.B】
Vanadium	0.08 max【A】

【A 】The sum of copper, nickel, chromium,molybdenum and vanadium shall not exceed 1.00 %.

【B 】The sum of chromium and molybdenum shall not exceed 0.32 %.

Mechanical Requirements

Tensile strength, min, ksi [MPa]【B】	70 [485]
Yield strength, min, ksi [MPa]	36 [250]
Elongation in 2 in. or 50mm, min,%: When standard round 2-in. or 50-mm gauge length or length equal to 4D is used	22
Strip specimens for wall thickness 5/1e in. [7.94 mm] and over and for small sizes tested in full section.	30
Formula for calculatingminelongation for strip specimens thinner than 5/16 in. [7.94 mm]; min % in 2 in. [50 mm]: t = actual thickness Inch-pound units (in.) SI units (mm)	48t+15 1.9t+15
Reduction of area,min, % 【C】	30
Hardness, HBW, max	197
【A】For small forgings, see 8.3.4.
【B】Determined by either the 0.2 % offset method or the 0.5 % extension-under-load method.
【C】For round specimens only.

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

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.