Types of Steel

Steel is basically carbonated iron. The amount of carbon (and other metals) determines the metal’s strength and flexibility.

Nomenclature

The name can tell you a lot. The numbering system for steel indicates what the iron has been combined with.

Steel TypeNumberExample
Plain Carbon Steels10XX1095
Manganese Steels13XX1350
Nickel Steels2XXX2340
Nickel Chromium Steels3XXX3150
Molybdenum Steels4XXX4140
Chromium Steels5XXX50100-B
Low Chromium51XX5160
Medium Chromium52XX52100
Chromium Vanadium Steels6XXX6150
Silicon Manganese Steels9XXX9160

Types of Steel Used in Blacksmithing

CMnSiCrNiMoCoVW
W-11.00.35.35
W-21.00.35.35.20
W-41.10.30.50.25
W-51.10.30.25.60
W-71.00.30.30.50.20
O-1.901.60.50.50
O-2.901.60.30
O-61.451.001.25.25
O-7.35.35.60.201.75
A-21.05.001.00
D-21.50.4012.00.80.90
D-32.25.35.2512.00.20
D-51.40.30.6013.00.503.30
D-62.00.80.3512.001.2
D-72.3512.001.04.00
L-31.001.5.20
L-6.70.751.50.25