Wolfram and alloy

Grade：W1

Standard：GB/T3875-2006, GB/T4187-1984,GB/T4181-1997,GB/T4184-2002,ASTM B760

Molybdenum and alloy

Grade：Mo1,Mo2, TZM, MoLa

Standard：GB/T3462-1982，GB/T4185-1984， GB/T3876-1983,GB/T3877-2006，GB/T14592-1993，GB/T17792-1999，GB/T4186-2002，GB/T4182-2003，ASTM B386-91，ASTM B387-90

Tantalum and alloy

Grade：Ta1, TaNb20, TaNb3, TaW2.5

Standard：GB/T3629-2006，GB/T8182-1987，GB/T14841-1993，ASTM B708，ASTM B5521，ASTM B365

Niobium and alloy

Grade：NbZr

Standard：GB/T3630-2006，GB/T8183-1987，GB/T14842-1993，ASTM B393，ASTM B392