Beryllium copper is a ductile, weldable, and machinable alloy. It is weldable, corrosion resistant, and stronger than 5052, but not as formable. Newer weldable aluminium alloys are used in the A380's airframe. It is ductile enough for deep drawing and weldable, but has low strength. Among the most important Gorynin materials are weldable titanium alloys for machine building and shipbuilding. AA 2519-T87 plate is weldable using AA 2319 filler. It has generally good mechanical properties and is heat treatable and weldable. Aermet is weldable with no preheating needed. Of all these materials, only two are affordable and weldable&colon; nickel and molybdenum. It is weldable only through friction welding, and has average machinability. Round Oak manufactured a weldable extra high-strength steel under the brand name, 'Thirty-Oak'. The individual links were from good, weldable bars with a low carbon content. HY-80 and HY-100 are both weldable grades; whereas, the HY-130 is generally considered unweldable.