Metal Alloys
Alloy Home
Steels
Stainless Steels
General Information
Properties
Stainless Stl. Grades
Austenitic
Martensitic
Ferritic
Precipitation Hardening
Stainless Steel List
AISI Type 2xx
AISI Type 3xx
AISI Type 4xx
AISI Type 5xx
AISI Type 6xx
* For other AISI or Non-AISI, please use the search function above or check Grades.
Specific Stainless Stl
General Information
Resources
Bibliography
Laser Focus World

Semiconductors, medical equipment, lasers, optics and aviation and aerospace.

Metal 3D Printing Design Guide

Direct Metal Laser Sintering (DMLS) 3D printing for parts with reduced cost and little waste.

Wind Systems

Towers, turbines, gearboxes; processes for shaping and finishing component parts.

Quality Magazine

Techniques to improve quality on the shop floor and in manufacturing planning.

more free magazines
 
AISI Type 309
Category Steel
Class Stainless steel
Type Austenitic standard
Common Names Chromium-Nickel steel
Designations  Germany: DIN 1.4828
Italy: UNI x 16 CrNi 23 14
United States: ASME SA249 , ASME SA312 , ASME SA358 , ASME SA403 , ASME SA409 , ASTM A167 , ASTM A249 , ASTM A276 , ASTM A312 , ASTM A314 , ASTM A358 , ASTM A403 , ASTM A409 , ASTM A473 , ASTM A511 , ASTM A554 , ASTM A580 , FED QQ-S-763 , FED QQ-S-766 , MIL SPEC MIL-S-862 , SAE 30309 , SAE J405 (30309) , UNS S30900

Composition
ElementWeight %
C  0.20 
Mn  2.00 
Si  1.00 
Cr  22.0-24.0 
Ni  12.0-15.0 
P  0.045 
S  0.03 

Mechanical Properties
Properties Conditions 
T (°C)Treatment
Density (×1000 kg/m3) 8 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 200 25  
Tensile Strength (Mpa) 515  25  hot finished and annealed (wire) more
Yield Strength (Mpa) 205 
Elongation (%) 40 
Reduction in Area (%) 50 
Hardness (HRB) 95 (max)  25  annealed (plate, sheet, strip) 

Thermal Properties
Properties Conditions 
T (°C)Treatment
Thermal Expansion (10-6/ºC) 15  0-100 more  
Thermal Conductivity (W/m-K) 15.6  100 more  
Specific Heat (J/kg-K) 500  0-100   

Electric Properties
Properties Conditions 
T (°C)Treatment
Electric Resistivity (10-9W-m) 780  25   
Glossary