Ferritic / Martensitic / Austenitic / Duplex / PH Stainless / Super-austenitic
MARTENSITIC
Composition (% Wt.)
Type UNS # Cr Mo Ni Mn Other
403 S40300 0.15 11.5-13.00 - - 1.00 -
416 S41600 0.15 12.0-14.0 0.06 - 1.25 0.15S min.
420 S42000 0.15 min. 12.00-14.00 - - 1.00 -
431 S43100 0.20 15.0-17.0 - 1.25-2.50 1.00 -
440C S44004 0.95-1.20 16.0-18.0 0.75 - 1.00 -
 
Mechanical Properties (annealed bar)
Type Tensile Strength (min) Yield Strength (min) % Elong. Hardness (min.)  
Rockwell
ksi MPa ksi MPa
403 70 480 40 275 20 -
416            
420 95 655 50 345 25 B92
431 125 862 95 655 20 C24
440C 110 758 63 448 14 B97
 
Specifications
403 ASTM A176; A276; A314;  A473; A479; A511
416 ASTM A194; A314; A473; A581; A582; A895; F593; F594
420 ASTM A276; A314; A473;  A580
431 ASTM A276; ; A473; A493; A511; A579; A580
440C ASTM A276; A314; A473; A493; A580