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1）低碳：由于韌性、焊接性和冷成形性能的要求高，其碳含量不超過0.20%；（2）加入以錳為主的合金元素；（3）加入鈮、鈦或釩等輔加元素：少量的鈮、鈦或釩在鋼中形成細碳化物或碳氮化物，有利于獲得細小的鐵素體晶粒和提高鋼的強度和韌性；此外，加入少量銅（≤0.4%）和磷（0.1%左右）等，可提高抗腐蝕性能。
1) low carbon: the toughness, weldability and cold forming performance requirements, the carbon content is less than 0.20%; (2) adding alloy elements to manganese based; (3) adding niobium, titanium or vanadium and other auxiliary elements: a small amount of niobium, titanium or vanadium carbide or carbonitride in fine form in steel, to obtain the fine ferrite grain and improve the strength and toughness of steel; in addition, adding a small amount of copper (less than 0.4%) and phosphorus (about 0.1%), can improve the corrosion resistance.
加入少量稀土元素，可以脫硫、去氣，使鋼材凈化，改善韌性和工藝性能。關于低合金板經過前一段時間的快速反彈.

Add a small amount of rare earth elements, can desulfurization, degassing, so that steel purification, improve toughness and process performance. On the low alloy plate after a period of rapid rebound.
上周國內鋼材市場價格漲幅明顯放緩，繼續上漲動力減弱;在成交不暢的情況下，市場疲態漸現，加上期鋼市場的持弱偏弱震蕩，進一步加重商家觀望心態，因此上周鋼價窄幅震蕩回落，供需雙方均有一定的觀望心態，因需求基本面受到南方雨水影響及商家在月底資金壓力再現影響，預計短期內國內鋼價。
Last week, the domestic steel market price increase is slowing down, continue to rise in power weakened; poor turnover situation, the market weakness gradually, plus the steel market to weak weak shocks, further aggravating the business mentality, so last week, steel price shocks narrow down, the two sides of supply and demand have a certain wait-and-see attitude, by the rain in the South and businesses in the end of the month due to financial pressure reproduction demand fundamentals, expected short-term domestic steel prices.
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