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AISI Type 309S
Category Steel
Class Stainless steel
Type Austenitic standard
Common Names Chromium-Nickel steel
Designations  France: AFNOR Z 15 CN 24.13
Germany: DIN 1.4833
Italy: UNI X 6 CrNi 23 14
United States: AMS 5523 , AMS 5574 , AMS 5650 , ASME 8A240 , ASTM A167 , ASTM A240 , ASTM A276 , ASTM A314 , ASTM A473 , ASTM A511 , ASTM A554 , ASTM A580 , SAE 30309S , SAE J405 (30309S)

Composition
ElementWeight %
C  0.08 
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) 7.7-8.03 25  
Poisson's Ratio 0.27-0.30 25  
Elastic Modulus (GPa) 190-210 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) 14.9  0-100 more  
Thermal Conductivity (W/m-K) 15.6  100 more  
Glossary
Essentials of Manufacturing

Information, coverage of important developments and expert commentary in manufacturing.

Mechanical Engineers Outlook

Guide for those interested in becoming a mechanical engineer. Includes qualifications, pay, and job duties.

Negotiate Your Salary

Learn the best principles to negotiate the salary you deserve!

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.