ASTM A240 441 2D Finished Stainless Steel Sheet

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Why choose a 2D finish over the commonly used 2B finish?
The 2B finish is smooth and glossy, whereas the 2D finish has a matte, silvery-gray appearance. The slightly rough microstructure of the 2D finish retains lubricant more effectively. Consequently, during deep drawing or severe forming operations, the 2D finish reduces friction between the workpiece and the die and prevents scoring, offering superior processing performance compared to the 2B finish.

441 stainless steel Specification

 

Chemical Composition (wt%)

Element	C	Mn	P	S	Si	Cr	Ni	Ti	Nb (Columbium)	N
Type 441	≤0.030	≤1.00	≤0.040	≤0.010	≤1.00	17.5-18.5	≤0.60	0.10-0.60	0.30+9xC to 0.90	≤0.030

 

Mechanical Properties (at Room Temperature)

Property	Value (Requirement)	Typical Value
Tensile Strength	≥ 415 MPa (60 ksi)	450 - 520 MPa
Yield Strength (0.2% Offset)	≥ 205 MPa (30 ksi)	250 - 320 MPa
Elongation (% in 50mm)	≥ 18.0 %	22 - 30 %
Hardness (Rockwell B)	≤ 95 HRB	75 - 85 HRB
Hardness (Vickers)	≤ 210 HV	150 - 180 HV

 

Physical Properties

Property	Value
Density	7.70 g/cm³
Modulus of Elasticity	200 GPa
Thermal Conductivity (100°C)	25.0 W/m·K
Thermal Expansion (0-100°C)	10.2 10⁻⁶/K
Specific Heat	460 J/kg·K

 

Stainless Steel 441 Sheets & Plates Equivalent Grade

Grade	WERKSTOFF NR.	AISI	UNS	JIS	EN
SS 441	1.4509	441	S44100	SUS 44100	X2CrTiNb18

 

SS 441 Sheet Applications

Automotive: Exhaust manifolds, front pipes, catalytic converter shells, and mufflers.
Kitchenware: Steam tables, catering equipment, and internal liners of appliances.
Heat Exchangers: Tubes and plates for boiler systems.
Elevators: Internal structural panels (where 2D finish is required for bonding or coating).
Construction: Roofing and wall cladding in non-marine environments.

 

441 Stainless Steel Sheet Price per kg

The global price for 441 stainless steel plate typically ranges from $1.25 to $6.00 per kilogram, depending on order volume, plate thickness, and surface finish.
Price details by market segment:
Bulk order prices range from $1.26 to $3.46 per kilogram (approximately $960 to $2,150 per metric ton).
For small-batch purchases or local plate cutting, prices generally range from $1.30 to $4.75 per kilogram, depending on the required thickness or custom surface finish specifications.
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Quality Control

GNEE offers PMI (Positive Material Identification), chemical composition analysis, mechanical property testing, dimensional inspection, and EN 10204 3.1 material certification; third-party inspections can also be arranged upon request. Standard orders can typically be shipped within 7–15 days, depending on stock availability, order quantity, thickness, width, cutting requirements, and surface specifications.

 

441 Plate PMI

Dimensional Measurement

Dimensional Measurement

GNEE PACKAGING AND SHIPPING

To protect 2D surfaces from moisture, scratches, and deformation during transit, we utilize wooden pallets, moisture-proof film, protective plastic film, steel strapping, and export-standard seaworthy packaging, thereby helping customers minimize the risks of scratches, moisture damage, and edge impact.

What is the difference between 441 and 304 stainless steel?
Composition: 441 is a ferritic stainless steel (containing no nickel), whereas 304 is an austenitic stainless steel (containing approximately 8% nickel).
Magnetism: 441 is strongly magnetic, while 304 is generally non-magnetic.
Thermal properties: 441 has a lower coefficient of thermal expansion and better thermal conductivity; consequently, it is less prone to fatigue cracking than 304 in high-temperature cyclic environments (such as exhaust pipes).
Cost: Due to the absence of nickel, the price of 441 is generally lower and more stable than that of 304.

What temperature can 441 stainless steel withstand?
Oxidation resistance: 441 maintains good oxidation resistance in continuous service temperatures up to 950°C.
It is primarily designed to replace 409L or 439 in automotive exhaust system components that operate at higher temperatures (such as manifolds and front pipes).

How can 441 and 439 stainless steel be distinguished?
Chemical composition: 441 contains niobium (Nb), whereas 439 typically contains only titanium (Ti).
High-temperature performance: 441 exhibits higher strength than 439 at temperatures above 600°C.
Testing: They cannot be distinguished by the naked eye; spectroscopic analysis (PMI) is required to detect the Nb content.