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Steel   Numbers
Steel Classification according to EN 10027-2.   Designation systems for steels.

You can compare the properties of steels after choosing the number

1.0XXXNon-alloy steels
Number = 1.00XX   Base steels
Number = 1.01XX   Quality steel (General structural steels with Rm < 500 MPa )
Number = 1.02XX   Other structural steels (Not intended for heat treatment with Rm < 500 MPa )
Number = 1.03XX   Steels with average C < 0,12%   or   Rm < 400 MPa
Number = 1.04XX   Steels with average 0,12% =< C < 0,25%   or   400 MPa = < Rm < 500 MPa
Number = 1.05XX   Steels with average 0,25% =< C < 0,55%   or   500 MPa =< Rm < 700 MPa
Number = 1.06XX   Steels with average C >= 0,55%   or   Rm >= 700 MPa
Number = 1.07XX   Steels with higher P or S content
1.0XXXAlloy Steels
Number = 1.08XX   Steels with special physical properties
Number = 1.09XX   Steels for other applications
1.1XXXNon-alloy special steels
Number = 1.10XX   Steels with special physical properties
Number = 1.11XX   Structural pressure vessel and engeneering steels with C < 0,5%
Number = 1.12XX   Structural pressure vessel and engeneering steels with C > = 0,5%
Number = 1.13XX  Structural pressure vessel and engeneering steels with special requirements
Number = 1.14XX   -
Number = 1.15XX   Tool steel
Number = 1.16XX   Tool steel
Number = 1.17XX   Tool steel
Number = 1.18XX   Tool steel
Number = 1.19XX   -
1.2XXXAlloy Tool Steels
Number = 1.20XX   Cr
Number = 1.21XX   Cr-Si,   Cr-Mn,   Cr-Mn-Si
Number = 1.22XX   Cr-V,   Cr-V-Si,   Cr-V-Mn,   Cr-V-Mn-Si
Number = 1.23XX   Cr-Mo,   Cr-Mo-V,   Mo-V
Number = 1.24XX   W,   Cr-W
Number = 1.25XX   W-V,   Cr-W-V
Number = 1.26XX   W excluding groups 24, 25 and 27
Number = 1.27XX   With Ni
Number = 1.28XX   Other
Number = 1.29XX   -
1.3XXXAlloy Miscellaneous Steels
Number = 1.30XX   -
Number = 1.31XX   -
Number = 1.32XX   High speed steel with Co
Number = 1.33XX   High speed steel without Co
Number = 1.34XX   -
Number = 1.35XX   Bearing steels
Number = 1.36XX   Materials with special magnetic properties without Co
Number = 1.37XX   Materials with special magnetic properties and with Co
Number = 1.38XX   Materials with special physical properties without Ni
Number = 1.39XX   Materials with special physical properties and with Ni
1.4XXXStainless and Heat Resisting steels
Number = 1.40XX   Stainless steel with Ni < 2.5 % without   Mo, Nb and Ti
Number = 1.41XX   Stainless steel with Ni < 2.5 % and   Mo but without   Nb and Ti
Number = 1.42XX   -
Number = 1.43XX   Stainless steel with Ni >= 2.5 % without   Mo, Nb and Ti
Number = 1.44XX   Stainless steel with Ni > = 2.5 % with   Mo but without   Nb and Ti
Number = 1.45XX   Stainless steels with special additions
Number = 1.46XX   Chemical resistant and high temp Ni alloys
Number = 1.47XX   Heat resistant steels with   Ni < 2.5 %
Number = 1.48XX   Heat resistant steels with   Ni > = 2.5 %
Number = 1.49XX   Materials with elevated temperature properties
1.5XXXStructural, pressure vessel and engineering steels
Number = 1.50XX   Mn-Si-Cu
Number = 1.51XX   Mn-Si,   Mn-Cr
Number = 1.52XX   Mn-Cu,   Mn-V,   Si-V,   Mn-Si-V
Number = 1.53XX   Mn-Ti,   Si-Ti
Number = 1.54XX   Mo,   Nb,   Ti,   V,   W
Number = 1.55XX   B,   Mn-B   Mn < 1.65 %
Number = 1.56XX   Ni
Number = 1.57XX   Cr-Ni with   Cr < 1.0 %
Number = 1.58XX   Cr-Ni with   1.0 % =< Cr < 1.5 %
Number = 1.59XX   Cr-Ni with   1.5 % =< Cr < 2 %
1.6XXXStructural, pressure vessel and engineering steels
Number = 1.60XX   Cr-Ni with   2 % =< Cr < 3 %
Number = 1.61XX   -
Number = 1.62XX   Ni-Si,   Ni-Mn,   Ni-Cu
Number = 1.63XX   Ni-Mo,   Ni-Mo-Mn,   Ni-Mo-Cu,   Ni-Mo-V,   Ni-Mn-V
Number = 1.64XX -
Number = 1.65XX   Cr-Ni-Mo with   Mo < 0.4 % + Ni < 0.2 %
Number = 1.66XX   Cr-Ni-Mo with   Mo < 0.4 %   +   2.0 % =< Ni < 3.5 %
Number = 1.67XX   Cr-Ni-Mo with   Mo < 0.4 % + 3.5 % =< Ni < 5 %,   or   Mo >= 0.4 %
Number = 1.68XX   Cr-Ni-V,   Cr-Ni-W,   Cr-Ni-V-W
Number = 1.69XX   Cr-Ni except groups 57 to 68
1.7XXXStructural, pressure vessel and engineering steels
Number = 1.70XX   Cr,   Cr-B
Number = 1.71XX   Cr-Si,   Cr-Mn,   Cr-Mn-B,   Cr-Si-Mn
Number = 1.72XX   Cr-Mo with  Mo < 0.35 % ,   Cr-Mo-B
Number = 1.73XX   Cr-Mo with   Mo >= 0.35 %
Number = 1.74XX   -
Number = 1.75XX   Cr-V with   Cr < 2.0 %
Number = 1.76XX   Cr-V with   Cr >= 2.0 %
Number = 1.77XX   Cr-Mo-V
Number = 1.78XX   -
Number = 1.79XX   Cr-Mn-Mo,   Cr-Mn-Mo-V
1.8XXXStructural, pressure vessel and engineering steels
Number = 1.80XX   Cr-Si-Mo,   Cr-Si-Mn-Mo,   Cr-Si-Mo-V,   Cr-Si-Mn-Mo-V
Number = 1.81XX   Cr-Si-V,   Cr-Mn-V,   Cr-Si-Mn-V
Number = 1.82XX   Cr-Mo-W,   Cr-Mo-W-V
Number = 1.83XX   -
Number = 1.84XX   Cr-Si-Ti,   Cr-Mn-Ti,   Cr-Si-Mn-Ti
Number = 1.85XX   Nitriding steels
Number = 1.86XX   -
Number = 1.87XX   Steels not for heat treatment by user
Number = 1.88XX   High strength weldable steels not intended for heat treatment by user
Number = 1.89XX   High strength weldable steels not intended for heat treatment by user
1.9XXXNon-alloy Quality steels
Number = 1.90XX   Base steels
Number = 1.91XX   Quality steel (General structural steels with Rm < 500 MPa )
Number = 1.92XX   Other structural steels (Not intended for heat treatment with Rm < 500 MPa )
Number = 1.93XX   Steels with average C < 0,12%   or   Rm < 400 MPa
Number = 1.94XX   Steels with average 0,12% =< C < 0,25%   or   400 MPa = < Rm < 500 MPa
Number = 1.95XX   Steels with average 0,25% =< C < 0,55%   or   500 MPa =< Rm < 700 MPa
Number = 1.96XX   Steels with average C >= 0,55%   or   Rm >= 700 MPa
Number = 1.97XX   Steels with higher P or S content
2.XXXXAlloy
 Number = 2.XXXX

European Steel and Alloy Grades / Numbers
Steel classification according to EN 10027-2. Designation systems for steels. Steel numbers


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