Calculation of magnetic field saturation inside coil core
Apart from the fact that you are probably misusing the length dimension of the ferrite, you are also miscalculating flux density quite badly (See further below). 

The length dimension for a ferrite core is the closed loop length that the magnetic field travels along and, for an electromagnet, it has to include the air gap. Any small amount of air gap will reduce the effective pemeability of the core to a value closer to air. You need to calculate the effective permeability and not use the initial permeability stated in the material data sheets.





Values


\$μ_0 = 4π × 10−7\$ H/m
\$μ_0\cdot μ_R = 0.01885\$ H/m
\$H = \dfrac{NI}{\text{length}} = \$50 turns x 1 amp / 0.03 metres = 1667 amp_turns per metre


Therefore B = 31.4 teslas.


  Can be this value be so low and can I be so far from saturation?


No, you've made a math error somewhere.