#!python

In [1]: from strupy.concrete.MaterialConcrete import MaterialConcrete

In [2]: someconcrete = MaterialConcrete()

In [3]: someconcrete.concretename
Out[3]: 'C25/30'

In [5]: someconcrete.get_availableconcreteclass()
Out[5]: 
['C12/15',
 'C16/20',
 'C20/25',
 'C25/30',
 'C30/37',
 'C35/45',
 'C40/50',
 'C45/55',
 'C50/60']

In [6]: someconcrete.set_concreteclass('C16/20')

In [7]: someconcrete.concretename
Out[7]: 'C16/20'

In [8]: someconcrete.fcd
Out[8]: 10.60 [MPa]

In [9]: someconcrete.fctm
Out[9]:  1.90 [MPa]