NM550E低温高强度耐磨钢板，舞钢生产硬度保证

一、NM550简介NM550是耐磨板，NM是指耐磨的意思，550是硬度值。通常看到的/B,代表值A表示不做冲击，数值B代表做常温20°冲击。像其他容器板类型的还有冲击D代表零下-20度冲击，"E"代表零下-40°度冲击。“F”代表冲击值-60°。NM550布氏硬度值达到550（HBW）。二、NM550交货状态：调质（淬火+回火）三、NM550钢板化学成分等级≤0.25≤0.70≤1.60≤0.025≤0.010≤0.50≤1.40-≤0.004B≤0.25≤0.70≤1.60≤0.025≤0.010≤0.50≤1.00≤1.00≤0.中五大元素含量对钢板性能影响：a、碳（C）：钢中含碳量增加，屈服点和抗拉强度升高，但塑性和冲击性降低，当碳量0.23%超过时，钢的焊接性能变坏，因此用于焊接的低合金结构钢，含碳量一般不超过0.20%。碳量高还会降低钢的耐大气腐蚀能力，在露天料场的高碳钢就易锈蚀；此外，碳能增加钢的冷脆性和时效敏感性。  b、硅（Si）：在炼钢过程中加硅作为还原剂和脱氧剂，所以镇静钢含有0.15－0.30%的硅。如果钢中含硅量超过0.50-0.60%,硅就算合金元素。硅能显著提高钢的弹性极限，屈服点和抗拉强度，故广泛用于作弹簧钢。在调质结构钢中加入1.0－1.2%的硅，强度可提高15－20%。硅和钼、钨、铬等结合，有提高抗腐蚀性和抗氧化的作用，可制造耐热钢。含硅1－4%的低碳钢，具有极高的导磁率，用于电器工业做矽钢片。硅量增加，会降低钢的焊接性能。c、锰（Mn）：在炼钢过程中，锰是良好的脱氧剂和脱硫剂，一般钢中含锰0.30－0.50%。在碳素钢中加入0.70%以上时就算“锰钢”，较一般钢量的钢不但有足够的韧性，且有较高的强度和硬度，提高钢的淬性，改善钢的热加工性能，如16Mn钢比A3屈服点高40%。含锰11－14%的钢有极高的耐磨性，用于挖土机铲斗，球磨机衬板等。锰量增高，减弱钢的抗腐蚀能力，降低焊接性能。  d、磷（P）：在一般情况下，磷是钢中有害元素，增加钢的冷脆性，使焊接性能变坏，降低塑性，使冷弯性能变坏。因此通常要求钢中含磷量小于0.045%，优质钢要求更低些。  e、硫（S）：硫在通常情况下也是有害元素。使钢产生热脆性，降低钢的延展性和韧性，在锻造和轧制时造成裂纹。硫对焊接性能也不利，降低耐腐蚀性。所以通常要求硫含量小于0.055%，优质钢要求小于0.040%。在钢中加入0.08-0.20%的硫，可以改善切削加工性，通常称易切削钢。 四、NM550钢板力学性能等级硬度（HBW）20AKV纵向～500提供～500≥21成分备注：允许钢板添加微合金强化元素，如Nb、V、Ti等。五、NM550公司状态：a、公司主营钢板品种:锅炉压力容器板、低合金板高强板、桥梁板、合金板、碳素钢、耐磨板、管线钢、核电用钢、风电水电用钢、船板、建筑结构钢、模具钢、军工钢板、临氢钢板及各种特种钢等。b、可根据需求进行加工、切割各种异型件，并代办运输，交货周期短。c、可供附加探伤要求和Z向性能(Z15/Z25/Z35)，可热轧、控轧、正火、退火、正火+回火、调质。六、NM550钢板用途：

NM550因为高强度耐磨钢板，尤其具有较高的抗磨损能力，布氏硬度值达到550（HBW），主要是在耐磨的场合或部位提供保护，使设备寿命更长，减少维修带来的检修和停机，相应的减少资金的投入。主要用于矿山、煤矿、环保、通风设备、自卸卡车及各种工程机械用耐磨易损件加工和制造等使用的结构钢板。

I. to NM550

NM550 is the wear NM is the wear and 550 is the value. /B A value of No and B A of 20°.Like other plate D for -20 and "E" for -40 ."F" the value of -60°.NM550 value 550 (HBW).

Ii. state of NM550: and

Iii. of NM550 steel plate

Grade C Si Mn P S Mo Cr Ni B

A 0.25 or less were 0.70, 1.60, 0.025, 0.010, 0.50 or less or less or less or less were 1.40 and 0.004 or less

B were 0.25, 0.70, 1.60, 0.025, 0.010 or less or less or less or less were 0.50, 1.00, 1.00, 0.004 or less or less or less

of five in NM550 on steel plate :

A, (C) : in steel yield point and but and . When 0.23%, the of steel will worse. the of low alloy steel used for does not 0.20%.High will also the of high steel in the open field is easy to rust;In can the cold and aging of steel. 

B. (Si) : is added in the as agent and so the steel 0.15-0.30% .If steel more than 0.50-0.60% is an . is used in steel it can the yield point and of steel.The of steel can be by 15-20% by 1.0-1.2% .The of and and can the and and make heat steel.Low steel 1-4%, with high used in the as steel sheet.The of will the of steel.

C, (Mn) : In the of is a good and . steel 0.30-0.50%.When 0.70% or more in steel is as " steel". with steel steel not only has but also has and so as to the of steel and of steel. For 16Mn steel is 40% than A3 yield point.Steel 11-14% has high wear and is used for ball mill etc.The of the of steel and the . 

D. (P) : In is a in which the cold of makes the the and makes the cold worse. the in steel is to be less than 0.045%, and the for steel is lower. 

E, (S) : is also a .It the steel to hot the and of the and and . is also bad for . the is to be less than 0.055% and 0.040% for high steel.The of 0.08-0.20% to steel which is often free steel. 

Iv. of NM550 steel plate

Grade (HBW) 20AKV J

450 ~ 500 is

450 ~ 500 ≥21

note: The steel plate is to add such as Nb, V, Ti, etc.

V. of NM550

A. The 's main steel plate : and low alloy high alloy wind power and ship mold steel and steel.

B. It can and cut all kinds of parts to the and them on with short cycle.

C. It can be used for flaw and (Z15/Z25/Z35). It can be + and .

Vi. Use of NM550 steel Plate:

NM550 has a value of up to 550 (HBW) of its high and of steel which is used to in or so as to the life of the the and stop by and the of funds. used in coal dump and wear - parts and of steel.