Type B: for fortepianos and square pianos up to c. 1820. The material is the same as that of Type A but is harder drawn. Recommended maximum practical tensions are:

 0.30mm                   8.1kg                                      0.56                       18.7

0.33                          9.3                                          0.60                        20.8

0.36                         10.4                                         0.65                         23.3

0.40                         12.0                                         0.70                         26.0

0.44                         13.6                                         0.75                         28.8

0.48                         15.4                                         0.80                         31.5

0.52                         17.1