<div>The world's financial leaders of G-20 have rejected protectionism and urged further dialogue on trade.&nbsp;</div>''<div><br />''</div>''<div>However, they failed to diffuse the threat of a trade war, days before United States' metals tariffs take effect and Washington is to announce measures against China.&nbsp;</div>''<div><br />''</div>''<div>The 2017 Hamburg declaration, which the financial leaders referred to yesterday, said the G-20 countries will continue to fight protectionism including all unfair trade practices.&nbsp;</div>''<div></div>''<div>Finance ministers and central bankers of the world's 20 biggest economies, discussed trade disruptions as a risk to growth at a two-day meeting.&nbsp;</div>''<div><br />''</div>''<div>The Final G-20 Ministers' statement said that they are working to strengthen contribution of trade among the economies.&nbsp;</div>''<div><br />''</div>''<div>United States' tariffs of 25 per cent on imported steel and 10 per cent on aluminum will come into effect from Friday.</div>''<div><br />''</div>