What is AISI 441 2D stainless steel coil?

What is AISI 441 2D stainless steel coil?

AISI 441 Stainless Steel Coil is a low-carbon, dual-stabilized ferritic stainless steel with approximately 18% chromium, corresponding to other standards such as EN 1.4509, UNS S43932, and JIS SUS441. Its carbon content is only ≤0.03%, and structural stability is achieved through the addition of titanium (Ti) and niobium (Nb).

 

AISI 441 2D Stainless Steel Coil refers to the basic surface after cold rolling, characterized by a matte, uniform, non-reflective finish, commonly used as a base for further processing such as polishing, brushing, or embossing. Its overall corrosion resistance is comparable to 304/304L stainless steel, with outstanding resistance to stress corrosion cracking. Intergranular corrosion resistance is superior to conventional 430 and 409 stainless steels, and its high-temperature strength exceeds that of 409 and 439 ferritic grades, allowing long-term service at temperatures up to approximately 800°C.

 

 

Additionally, AISI 441 stainless steel coils offer excellent weldability, superior cold forming and deep drawing performance, and high precision for cutting and grinding, making them ideal for manufacturing complex industrial components.

 

Chemical Composition (ASTM A240 / EN 10088-2)

Element	Carbon (C)	Manganese (Mn)	Silicon (Si)	Chromium (Cr)	Phosphorus (P)	Sulfur (S)	Titanium (Ti)	Niobium (Nb)
Standard (%)	≤ 0.030	≤ 1.00	≤ 1.00	17.5 – 18.5	≤ 0.040	≤ 0.015	0.10 – 0.60	0.30 – 0.90

 

 Mechanical Properties (at Room Temperature)

Property	Metric Value	Imperial Value
Tensile Strength (Rm)	430 – 630 MPa	62 – 91 ksi
Yield Strength (Rp0.2)	≥ 250 MPa	≥ 36 ksi
Elongation (A50mm)	≥ 18%	≥ 18%
Hardness (Brinell / Rockwell B)	≤ 201 HBW / 92 HRB	≤ 201 HBW / 92 HRB
Modulus of Elasticity	200 GPa	29000 ksi

 

Feature	2D Finish	2B Finish (Comparison)
Process	Cold Rolled + Annealed + Pickled	Cold Rolled + Annealed + Pickled + Skin Pass
Appearance	Dull, Matte, Non-Reflective	Smooth, Slightly Reflective/Bright
Roughness (Ra)	Typically 0.5 – 1.5 μm	Typically < 0.5 μm
Best Application	Deep Drawing, Paint Bonding, Industrial	Aesthetics, Household Appliances, Panels
Lubricant Retention	High (Excellent for stamping)	Moderate

When ordering AISI 441 for exhaust manifolds or heat exchanger shells, always specify the Maximum Operating Temperature. While 441 is stable up to 850°C-950°C (oxidation limit), the 2D finish is preferred by manufacturers who perform heavy deformation because the matte surface.

Click to customize 441 stainless steel coil

Applications

Automotive Industry: Primarily used in the manufacture of automotive exhaust manifolds and core components of exhaust systems.

High-Temperature Industrial Applications: Used in the production of heat exchangers, high-temperature industrial equipment, structural components subjected to prolonged heat exposure, and industrial system components requiring long-term thermal stability.

Other Applications: Also applicable to high-temperature components in household appliances, building decoration components, equipment for corrosive chemical environments, food processing machinery, and other scenarios.

 

Feature	AISI 430	AISI 439	AISI 441
EN Standard	1.4016	1.4510	1.4509
Stabilization	None	Single (Titanium - Ti)	Dual (Titanium + Niobium - Ti+Nb)
Chromium (Cr) %	16.0 – 18.0%	17.0 – 19.0%	17.5 – 18.5%
High-Temp Oxidation Resistance	Moderate (up to 800°C)	Good (up to 850°C)	Excellent (up to 950°C)
Corrosion Resistance	Moderate (Indoor/Mild)	Good (Pitting resistant)	Superior (Best in high-temp/condensate)
Formability / Deep Drawing	Good	Excellent	Excellent (Suitable for complex shapes)
Typical Surface	2B, BA	2B, 2D	2B, 2D
Primary Applications	Kitchenware, household appliances, indoor trim.	Heat exchangers, sugar industry, condenser tubes.	Automotive exhaust systems (manifolds/mufflers), lift panels, catering equipment.

 

AISI 441 2D Stainless Steel Coil price per kg

The price for an AISI 441 2D (cold-rolled, unpolished) stainless steel coil typically ranges from $1.45 to $2.30 per kg (£1.15 to £1.80/kg). The exact rate depends heavily on order volume, gauge (thickness), and global alloy surcharges.

 

AISI 441 2D stainless steel coil supplier

AISI 441 is widely used in exhaust systems. GNEE strictly adheres to the IATF 16949 automotive quality management system standard. Every roll of 2D surface 441 stainless steel undergoes rigorous intergranular corrosion testing and deep-drawing performance testing to ensure stability at 950°C.

We can provide ultra-thin precision-stamped strip with thickness tolerances as low as ±0.01mm and widths as narrow as 3mm, with clean, burr-free cuts, directly compatible with your automated welding lines.

 

AISI 441 2D Stainless Steel Coil Specification

Grade	Actual Thickness (mm)	Width (mm)	Weight (tons)	Grade	Nominal Thickness (mm)	Coil No.	Status	Actual Width (mm)
J441/2D	0.921	1250	7.953	M1	1.0	26103150E	Full Coil	1255
J441/2D	0.923	1250	8.004	M1	1.0	26103040E	Full Coil	1257
J441/2D	0.923	1250	7.459	M1	1.0	26103040C	Full Coil	1255
J441/2D	2.915	1250	7.446	M1	3.0	26103220C	Full Coil	1260
J441/2D	2.915	1250	7.288	M1	3.0	26103220D	Full Coil	1260
J441/2D	0.918	1250	8.059	M1	1.0	25C05980C	Full Coil	1251
J441/2D	0.920	1250	8.874	M1	1.0	25C05970D	Full Coil	1255
J441/2D	0.920	1250	8.628	M1	1.0	25C05970C	Full Coil	1255
J441/2D	1.917	1250	8.664	M1	2.0	26504260C	Full Coil	1260
J441/2D	1.917	1250	8.506	M1	2.0	26504260D	Full Coil	1260
J441/2D	1.418	1250	9.431	M1	1.5	26513910C	Full Coil	1260
J441/2D	1.418	1250	9.136	M1	1.5	26513910D	Full Coil	1260
J441/2D	1.124	1250	7.773	M1	1.2	26513970E	Full Coil	1255
J441/2D	1.124	1250	7.607	M1	1.2	26513970C	Full Coil	1255
J441/2D	1.124	1250	7.597	M1	1.2	26513970D	Full Coil	1255

 

High-quality packaging

Inner Core Protection: A cardboard or metal core is inserted inside the roll core to prevent it from collapsing under its own weight or stacking pressure.

Outer Protective Layer: Some lightweight packaging uses thickened honeycomb cardboard.

Each roll must have a clear label indicating: material (441 2D), heat number, coil number, weight (Gross/Net Weight), thickness and width tolerances, and supplier name.