aisi-sae-carbon-and-alloy-steel-numbering

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Home > Resources > Technical Resources > Carbon and Alloy Steel Numbering

AISI-SAE Carbon and Alloy Steel Numbering

 


Steel AISI-SAE Designation Nominal Alloy Content (%)
Carbon Steels 10XX Plain Carbon (Mn 1.00% max.)
11XX Resulfurized
12XX Resulfurized and Rephosphorized
15XX Plain Carbon (Max. Mn range 1.00 to 1.65%)
Manganese Steels 13XX Mn 1.75
Nickel Steels 23XX Ni 3.50
25XX Ni 5.00
Nickel-Chromium Steels 31XX Ni 1.25; Cr 0.65 and 0.80
32XX Ni 1.75; Cr 1.07
33XX Ni 3.50; Cr 1.50 and 1.57
34XX Ni 3.00; Cr 0.77
Molybdenum Steels 40XX Mo 0.20 and 0.25
44XX Mo 0.40 and 0.52
Chromium-Molybdenum Steels 41XX Cr 0.50, 0.80 and 0.95; Mo 0.12, 0.20, 0.25 and 0.30
Nickel-Chromium-Molybdenum Steels 43XX Ni 1.82; Cr 0.50 and 0.80; Mo 0.25
43BVXX Ni 1.82; Cr 0.50; Mo 0.12 and 0.35; V 0.03 min.
47XX Ni 1.05; Cr 0.45; Mo 0.20 and 0.35
81XX Ni 0.30; Cr 0.40; Mo 0.12
86XX Ni 0.55; Cr 0.50; Mo 0.20
87XX Ni 0.55; Cr 0.50; Mo 0.25
88XX Ni 0.55; Cr 0.50; Mo 0.35
93XX Ni 3.25; Cr 1.20; Mo 0.12
94XX Ni 0.45; Cr 0.40; Mo 0.12
97XX Ni 0.55; Cr 0.20; Mo 0.20
98XX Ni 1.00; Cr 0.80; Mo 0.25
Nickel-Molybdenum Steels 46XX Ni 0.85 and 1.82; Mo 0.20 and 0.25
48XX Ni 3.50; Mo 0.25
Chromium Steels 50XX Cr 0.27, 0.40, 0.50 and 1.05
51XX Cr 0.80, 0.87, 0.92, 0.95, 1.00 and 1.05
50XXX Cr 0.50; C 1.00 min.
51XXX Cr 1.02; C 1.00 min.
52XX Cr 1.45; C 1.00 min.
Chromium-Vanadium Steels 61XX Cr 0.60, 0.80 and 0.95; V 0.10 and 0.15 min.
Tungsten-Chromium Steels 72XX W 1.75; Cr 0.75
Silicon-Manganese Steels 92XX Si 1.40 and 2.00; Mn 0.65, 0.82 and 0.85; Cr 0.00 and 0.65
High Strength Low-Alloy Steels 9XX  

 

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