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舞阳钢板SA387Gr91正火+回火交货,化学成分和机械性能有保证

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舞阳钢板SA387Gr91正火+回火交货,化学成分和机械性能有保证

1、是美国ASME材料铬钼合金钢,美标读作:阿斯米。是大型核电站用钢,一般情况也用在其他地方。2、热处理方法:正火+回火。(即交货状态)正火温度是1040~1080℃;回火温度730~800℃。3、化学成分:化学成分:C 0.06-0.15 Mn 0.25-0.66 P ≤0.025 S ≤0.012 Si 0.18-0.56 Ni ≤0.43 Cr 7.90-9.60 Mo 0.80-1.10 V 0.16-0.27 Nb 0.05-0.11a、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。  4、力学性能:钢板牌号抗拉强度屈服强度拉伸率≥≥≥20%5、特性:5.1、钢相当于国标,具有高的抗氧化性能和抗高温蒸汽腐蚀性能。5.2、在中温(350 ~ 480)临氢环境中具有防止氢脆、氢腐蚀、氢剥离、硫化物腐蚀性能,同时具有良好的低回火脆性。5.3、还具有良好的冲击韧性和高而稳定的持久塑性及热强性能。在使用温度低于620时,其许用应力高于奥氏体不锈钢。在550以上推荐的设计许用应力约为T9和2.钢的两倍,有良好耐晶间腐蚀性。5.4、运用特殊的冶炼手段,降低磷的含量从而使到 SA387 具有很高的抗脆性,同时在低温环境下也具有良好的冲击韧性。5.5、SA387材料适用于在高温下加氢反应和转换设备中的精炼和气体处理,钢板的最大厚度可达 250mm厚度。根据不同的厚度和冲击要求,SA387钢板的热处理选择正火加回火或者正火加快速冷却加回火的处理。6、适用范围:用于制造抵抗硫酸、磷酸、蚁酸、醋酸的设备。广泛使用于化工制造、石油化工以及火力发电厂设备的制造,如合成氨反应器、煤气化炉、变换炉和加氢反应器等。

7、应用:钢可作为亚临界、超临界锅炉壁温≤625的高温过热器、再热器用钢管,以及壁温≤600高温集箱和蒸汽管道,也可作为核电热交换器以及石油裂化装置炉管。

is an ASME alloy steel. The is asmi.It's steel for large power and it's used as well.

2. heat : + .(i.e. of )

The of is 1040~1080℃. 730~800℃.

3. :

:

0.06 0.15 C

Mn, 0.25 to 0.66

P 0.025 or less

S 0.012 or less

Si, 0.18 to 0.56

Ni 0.43 or less

Cr 7.90 to 9.60

Mo, 0.80 to 1.10

0.16 0.27 V

Nb 0.05 to 0.11

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. 

4. :

yield ratio of steel plate

585 mpa or 415 mpa or 20% or

5. :

5.1 steel is to and has high and high steam .

5.2 It has the of and at (350 ~ 480) and has good low .

5.3 It also has good and high and of and .When the is lower than 620, the is than steel.The above 550 is twice that of T9 and 2.25 with good .

5.4 means is used to the of so that SA387 has high and good under low .

5.5 SA387 is for and gas in and at high . The of steel plate can be up to 250mm. to and the heat of SA387 steel plate can be and or and rapid and .

scope: used for to acid, acid, acid and acid. used in and power plant such as coal and .

7. of : Steel can be used as and tubes for and with wall ≤625, as well as and steam pipe with wall ≤600, as well as pipe for power heat and unit.

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