HABA K52 (Konstrukta52)



Engineering steel

HABA K52 is a extremely low-tension engineering steel which is specially low-tension annealed at HABA and is easy to weld. It is used for intensively processed machine components of all kinds where a high degree of dimensional stability is required.



  • Base plates
  • Mounting plates
  • Table tops



Thickness grinded ≤Ra1.6 (N7)
Tolerance +0.25/0 mm
Parallelism ≤0.05 mm
Evenness ≤0.2 mm
Length/width Ra6.3-12.5 cut with a precision circular saw
HABA standard tolerance nominal size +1.0/0 mm
Customer-specific tolerance within a tolerance field of 0.4 mm
Surface refinement All metallic and non-metallic coatings

We also manufacture rolled and milled blanks on request as well as special thicknesses and tolerances.



Tensile strength Rm 470-630 (N/mm2)
Yield strength ReH 295-355 (N/mm2)
Breaking strain (Lo = 5 do) A5 17-22 %
Impact energy AV (J) ≥27, test temp. -20°C
Density 7.85 kg/dm3
E-module ~210 kN/mm2
Thermal conductivity coefficient 35-45 (W/mK)
Thermal expansion coefficient 11-14 (10-6/K)