OnlineMetals.com Home Page – Customer Service (888) 527-3331
My cart
notification bell notification bell active
  • Close menu
  • Deals
  • Hello, Sign in
  • Account
    • My Account
    • Order History
    • My Quotes
    • Project Lists
    • Contact Us
Chicago Willis TowerWe're now in Chicago!
Pay $0 shipping when you pickup.
  • Shop by Material
    • Metals
    • Alloy Steel
    • Aluminum
    • Beryllium Copper
    • Brass
    • Bronze
    • Carbon Steel
    • Copper
    • Dura-Bar® Cast Iron
    • Lead
    • Magnesium
    • Nickel
    • Nickel Silver
    • Pewter
    • Stainless Steel
    • Titanium
    • Tool Steel
    • Tungsten Carbide
    • Zinc
    • Other Materials
    • Carbon Fiber
    • Coal
    • Graphite
    • Machinable Wax
    • Plastics
    • Rubber
    • Wood
    • NEW Metal - Carbon Composite

    • Mfg. Supplies
    • 3D Printing
    • Fittings
    • Abrasives
  • Shop by Shape
    • Long Product (Bar)
    • Round
    • Square
    • Rectangle
    • Angle
    • Channel
    • Hex
    • Hollowbar
    • Half Oval
    • Half Round
    • T-Bar
    • T-Slot
    • Drill Rod
    • I-Beam
    • Round Rod
    • Threaded Rod
    • Key Stock
    • Rebar
    • Flat Product
    • Sheet & Plate
    • Strip
    • Precision Blanks
    • Circles
    • Expanded
    • Perforated
    • Textured Sheet
    • Tread (Diamond) Plate
    • Foil
    • Wire Mesh
    • Baseplates
    • Tube
    • Round
    • Pipe
    • Square
    • Rectangle
    • Coil
    • Hollowbar
    • Streamline Tube
    • EZ Tube
    • Hypodermic Tube
    • Other
    • Ball
    • Decorative
    • Pipe Fittings
    • NEW ProtoBoxes

    • Sample Pack
    • U-Edge
    • Cable and Wire
    • Razor Wire
    • Butt Hinges
  • Rewards
    • OLM Rewards
    • About Rewards
    • Sign In for Rewards
  • Industries Served
    • Industries Served
    • Aerospace
    • Architectural
    • Automotive/Motorsports
    • Bicycles/Cycling
    • Bladesmithing
    • Defense
    • Education/Schools
    • Marine
    • Medical
    • Power and Energy
    • Prototyping and R&D
    • Robotics
  • Knowledge Hub
    • Articles
    • Working With Metal
    • Understanding Materials
    • Applications
    • Projects
    • Maker Spotlight
    • Online Metals Exclusive Content
    • Reference Guides
    • Product Guides
    • Temper Guide
    • Tolerances
    • Hardness Conversion Table
    • Thickness Conversion Table
    • Fraction Conversion Table
    • Melting Points of Materials
    • Weight Calculator
    • Videos
    • Made with Metals
    • Materials Talk
    • DIY & How-to Projects
    • The Best of Online Metals
    • Quality
    • Mill Test Reports (MTR)
    • MSDS
  • Get a Quick Quote
  • Find a Location
  • Home
Close menu

Sign In

Sign In

Don't have an account?

Create Account

Create an Account

  • fast checkoutFaster Checkout
  • barcode scanSimple Order Tracking
  • help toolHelpful Business Tools
notification-bell Notifications
headsetContact Us

Notifications

Sign in or create an account to receive order updates and important notifications.

Sign In

Don't have an account?

Create Account
Shop all Products
  • Metals
      • Metals
  • Plastics
      • Plastics
  • Other Raw Materials
      • Other Raw Materials
  • Machine Ready Stock
      • Machine Ready Stock
  • Sample Packs & Protoboxes
      • Sample Packs & Protoboxes
  • Bearings, Shafts and Gears
      • Bearings, Shafts and Gears
  • Cable and Wire
      • Cable and Wire
  • Fastening and Bonding
      • Fastening and Bonding
  • Fittings
      • Fittings
  • Finishing Products
      • Finishing Products
  • Framing Systems
      • Framing Systems
  • Tools and Fabricating
      • Tools and Fabricating
  • Facilities and Maintenance
      • Facilities and Maintenance
  • Architectural & Decorative Components
      • Architectural & Decorative Components
Precision Ground Blanks

Open for Orders 24/7!

Get a Quick Quote
Deals
Get a Quick Quote
  • Home
  • product guide
  • Alloy
309

Stainless 309 Product Guide

 

Applications | Specifications | Mechanical and Chemical Data | Tolerances

 

Overview

309 stainless steel is a chromium nickel austenitic alloy that was designed for use in high temperature corrosion resistance applications. In elevated temperatures, 309 possesses high tensile strength, creep strength, and resists oxidation at elevated termperatures. It machines similarly to 304 stainless steel and exhibits fair formability.

 

Common Trade Names

UNS S30900, AISI 309, Alloy 309, austenitic stainless steel

 

Other Resources

Safety Data Sheet | Weight Calculator | Mill Test Reports

 

Products

Round Bar 309 | Sheet/Plate 309 | Foil Wrap 309

 

Applications

  • Aerospace
  • Heat Exchangers
  • Boiler Baffles
  • Oven Linings
  • Petroleum Refining
  • Waste Treatment

 

Stainless 309 Specifications

ASTM

AMS

A240 5523


Chemistry Information
Element
Percentage
Cr 23
C 0.2 max
Fe 60
Mn 2 max
Ni 14
P 0.045 max
S 0.03 max
Si 1 max
Knowledge Hub
  • Application Hub
  • Article Hub
  • Reference Tool & Guide Hub
  • Video Hub
Quick Tools
  • Metal Weight Calculator
  • Product Guides
  • Hardness Conversion Table
  • Melting Points of Metal
  • Made With Metals Gallery
Partner Services
  • Become a Marketplace Seller
  • Net 30 Credit Terms
  • W9 Form & ACH Payment Setup
Terms of Use
  • Cookie Preferences
  • Privacy Policy
  • Returns & Price Matching
  • Site Accessibility
  • Terms & Conditions
  • Rewards Program
  • Rewards T&Cs
About Us
  • Careers
  • Contact Us
  • Environmental Initiatives
  • Location & Hours
  • Our Story
  • Shipping Process
  • ISO & Quality
  • Reviews
  • Brand Kit

Knowledge Hub online metals footer navigation arrows
  • Application Hub
  • Article Hub
  • Reference Tool & Guide Hub
  • Video Hub

Quick Tools> online metals footer navigation arrows
  • Weight Calculator
  • Product Guides
  • Hardness Conversion Table
  • Melting Points
  • Made With Metals Gallery

Partner Services online metals footer navigation arrows
  • Become a Marketplace Seller
  • Net 30 Credit Terms
  • W9 Form & Vendor Information

Terms of Use online metals footer navigation arrows
  • onclick="Osano.cm.showDrawer('osano-cm-dom-info-dialog-open')">Cookie Preferences
  • Privacy Policy
  • Returns & Price Matching
  • Site Accessibility
  • Terms & Conditions
  • Rewards Program
  • Rewards T&Cs

About Us> online metals footer navigation arrows
  • Careers
  • Contact Us
  • Environmental Initiatives
  • Locations & Hours
  • Our Story
  • Shipping Process
  • ISO & Quality
  • Reviews
  • Brand Kit

ALL CONTENT © ONLINEMETALS.COM 1999-2026. ALL RIGHTS RESERVED.

Email: [email protected]

Facebook X Pinterest Instagram Linkedin Youtube

Close

Sign In
OnlineMetals Rewards

A link to reset your password has been sent to your email address.


Follow the instructions in the email to reset your password.

Your password has been updated successfully.

Please use it when signing in below

Sign In to request a quote
 
Password guidelines

  • Minimum 8 characters
  • Minimum three character classes must be used from below:
    • Uppercase letters (A-Z)
    • Lowercase letters (a-z)
    • Numbers (0-9)
    • Special characters: ~!@$%^&*_-+=`|\(){}[]:;"',.?/
Keep me "signed in" info

Choosing "Keep me signed in" reduces the number of times you're asked to sign in on this device

To keep your account secure, use this option only on your personal devices.

Don't have an account yet?

Close

Sign In
sitelogo

Welcome,
!
 
Password guidelines

  • Minimum 8 characters
  • Minimum three character classes must be used from below:
    • Uppercase letters (A-Z)
    • Lowercase letters (a-z)
    • Numbers (0-9)
    • Special characters: ~!@$%^&*_-+=`|\(){}[]:;"',.?/
Keep me "signed in" info

Choosing "Keep me signed in" reduces the number of times you're asked to sign in on this device

To keep your account secure, use this option only on your personal devices.

error Continue modifying your quoted cart?

Please note: If you choose to continue modifying your order, you will lose quoted pricing.

  • Your cart will adjust to regular pricing of our products, as found on our site.
  • If you wish to go back to your original quoted pricing, it will be available on your quote history page in your account until it expires.
Or