ASTM A105N Customized Flanges Order

This shipment comprises two batches of ASTM A105N customized flanges(blind flange circle & flange Ring), both successfully manufactured. Both batches are crafted from ASTM A105 N-grade forged carbon steel and undergo normalizing treatment, representing the industry’s cutting-edge manufacturing capabilities in high-pressure, high-temperature pipeline connection and sealing solutions. These components will be deployed in critical pressure pipeline systems for major domestic clean energy projects, playing an irreplaceable role in ensuring the projects’ safe and reliable operation.

Procurement Information

Forged Pre-Machine Blind Flange Circle

• Shape: Circular solid forging blank
• Outer Diameter (OD): 40 inches
• Thickness (THK): 3.5 inches

Forged Pre-Machine Flange Ring

Shape: Ring-shaped forging blank

Outer Diameter (OD): 40 inches

Inner Diameter (ID): 30 inches

Thickness (THK): 5 inches

ASTM A105N Chemical Composition

ASTM A105N is a high-quality medium-carbon steel with a core composition of Carbon (C) ≤ 0.35% and Manganese (Mn) 0.60-1.05%. The standard strictly regulates the content of Sulfur (S) and Phosphorus (P), while limiting the total amount of residual elements such as Copper and Nickel. This ensures the material’s excellent forgeability, weldability, and low-temperature impact toughness.

CHEMICAL	LIMITS	C	Mn	P	S	Si	Cu	Ni	Cr	Mo	V
ASTM A105N	MIN		0.600
	MAX	0.350	1.050	0.040	0.050		0.400		0.300	0.120	0.080

ASTM A105N Mechanical Properties

The mechanical properties of this material are specified for the normalized (N) condition, primarily including: Tensile Strength ≥485 MPa, Yield Strength ≥250 MPa, Elongation ≥22%. This set of combined specifications ensures forgings possess high strength, good plasticity, and practical machinability.

MATERIAL	T.S (MPA)	Y.S (MPA)	EL %	R/A %	HARDNESS
ASTM A105N	485min	250 min	22 min	30 min	197 max

Core Value of ASTM A105N Customized Flanges Forgings

Pre-Machine forgings represent our premium customized solutions. Compared to standard finished flanges, these bespoke components offer irreplaceable advantages:

✅Foundation for Performance Optimization: Our forgings utilize multi-directional die forging, ensuring complete distribution of metal flow lines along the product’s geometry.

✅Unparalleled Flexibility: Forgings in this state provide maximum machining freedom.

✅Balance of Cost and Efficiency: Procuring pre-machined forgings instead of raw steel ingots saves you substantial investment and time costs associated with initial forging and rough machining.

✅Quality Traceability and Consistency: Full traceability from steel mill billet to forged form.

Typical Application Fields

• Oil and Gas: Offshore drilling platforms, onshore oil and gas fields, long-distance pipeline pumping stations
• Clean Energy and Power: Reactor auxiliary piping in nuclear power plants, high-temperature high-pressure steam piping in thermal power plants
• Chemical and Petrochemical: Large reactors, hydrocracking units, ethylene cracking furnaces
• Heavy Machinery: Components for manufacturing large presses, mining equipment, etc.

ZIZI specializes in manufacturing high-precision, high-performance custom flanges and ring forgings. We focus on serving the high-end equipment manufacturing sectors, including energy and chemical processing, heavy machinery, and marine engineering. Leveraging advanced processes and a rigorous quality control system, we provide customers with safe, reliable, and long-lasting core component solutions.