309 Stainless Steel Foil in Stock

If you are looking for 309 stainless steel foil in stock for your industrial or engineering project, you are in the right place. At Gnee, we supply premium quality ASTM A240 / UNS S30900 stainless steel foil with excellent resistance to oxidation and scaling at elevated temperatures. With ready-to-ship stock, competitive prices, and global delivery, we are your trusted stainless steel partner.

 

what is 309 Stainless Steel Foil?

309 stainless steel foil is a thin sheet of an austenitic chromium-nickel stainless steel alloy that performs well up to 1093°C (2000°F), outperforming 304 stainless steel in high-temperature environments.This foil material is ideal for wrapping or fabricating components requiring high-temperature performance, such as wrapping tools to prevent oxidation during heat treatment. It is suitable for furnace components, heat exchangers, exhaust systems, and aerospace applications.

 

309 Stainless Steel Foil Specification

Specification	Details
Standard	ASTM A240, AISI 309, UNS S30900
Thickness	0.02 mm – 0.2 mm (customized available)
Width	100 mm – 600 mm (slit coils available)
Finish	Bright Annealed (BA), 2B, Mirror, Custom
Hardness	Annealed / Half Hard / Hard
Density	7.9 g/cm³
Tensile Strength	≥ 515 MPa
Yield Strength	≥ 205 MPa
Elongation	≥ 40%
Packaging	Wooden box, moisture-proof wrapping, export standard
Certification	ISO, SGS, BV, Mill Test Certificate

 

What is the price of 309 stainless steel foil per kg?
The price ranges from USD 6.50 – 9.50 per kg, depending on thickness, width, surface finish, and order volume.

 

How to Calculate SUS309 Foil Weight

To calculate the weight of stainless steel foil, use the following formula:

Weight (kg) = Thickness (mm) × Width (mm) × Length (m) × Density (g/cm³) ÷ 1,000,000

Example:

Thickness = 0.1 mm

Width = 300 mm

Length = 100 m

Density of SUS309 = 7.93 g/cm³

👉 Weight = 0.1 × 300 × 100 × 7.93 ÷ 1,000,000 = 2.38 kg

This calculation helps you quickly estimate coil or sheet weight before placing an order, making budgeting and logistics more transparent.

 

Applications of 309 Stainless Steel Foil

Furnace components

Heat treatment trays

Aerospace insulation materials

Exhaust systems

Power generation equipment

Chemical processing

 

Due to rising raw material costs, the price per kilogram of SUS309 stainless steel foil is on the rise. If you're planning to purchase, now is the best time to secure your order and avoid future price increases. Gnee Stainless Steel has over 18 years of export experience, serving customers in over 60 countries. We meet ISO, SGS, and BV certified quality control standards. We offer custom cutting, slitting, polishing, and packaging services. We offer fast delivery: 7-15 days, depending on order size. If you have a project in mind, contact us now for the best quality and pricing!Email: sales@gneestainless.com

 

        

FAQ

Q1: Can I order small MOQ for trial?
A1: Yes, we accept small order quantities for trial projects.

Q2: Do you provide test certificates?
A2: Yes, we provide Mill Test Certificates (MTC), ISO, SGS, and BV reports with every shipment.

Q3: How do you pack stainless steel foil for export?
A3: We use moisture-proof wrapping, wooden boxes, and pallets to ensure safe delivery.

Q4: Can I request customized cutting or surface finish?
A4: Absolutely. We provide slitting, polishing, and cutting services based on your project needs.