CARBONS & ALLOYS

FOSTER KNIVES CHART

Carbon steels and alloy steels are designated by a four digit number, where the first digit indicates the main alloying element's), the second digit indicates the secondary alloying element's), and the last two digits indicate the amount of carbon, in hundredths of a percent by weight. For example, a1170 steel is a plain-carbon steel containing 0.70 wt% CARBON

Major classifications of steel

SAE designation

Type

1xxx

Carbon steels

2xxx

Nickel steels

3xxx

Nickel-chromium steels

4xxx

Molybdenum steels

5xxx

Chromium steels

6xxx

Chromium-vanadium steels

7xxx

Tungsten steels

8xxx

Nickel-chromium-vanadium steels

9xxx

Silicon-manganese steels

 

 

(1)EXAMPLE (1107)           

 

 

1 MAIN                       CARBON STEEL            100% CARBON

 

1 SECONDARY         CARBON STEEL

 

07                     0.07 ONE HUNDREDTHS BY WEIGHT OF CARBON

 

__________________________________________________    

 

(2) EXAMPLE (1207)

 

1 MAIN                           CARBON STEEL

 

2 SECONDARY             NICKEL STEEL

 

                                                  

  07                  0.07 ONE HUNDREDTHS BY WEIGHT OF CARBON

__________________________________________________________________________

 

 

 

The higher the nickel content, the more protection the Knives has from corrosion

 

1055 Carbon Steel 1055 steel is right on the border between a medium and a high carbon steel, with a carbon

 content between 0.50%-0.60% and with

 manganese between 0.60%-0.90% as the only other component. The carbon content and lean alloy make this a shallow hardening steel with a quenched hardness between Rc 60-64 depending on exact carbon content. These combination of factors make this one of the toughest steels available because, when quenched, it produces a near saturated lathe martensite with no excess carbides, avoiding the brittleness of higher carbon materials. This steel is particularly suited to applications where strength and impact resistance is valued above all other considerations and will produce blades of almost legendary toughness.

1095 Steel – Plain carbon steel used in knife making. Proven to be one of the most popular steels.

 

CARBON An element present in all steels. More carbon

 increases hardness.

 

NICKEL – An alloy addition that improves steel’s toughness,

 harden ability and corrosion

 resistance. Nickel is a major element in steel used for kitchen cutlery and dive knives..

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