本文目录一览:
- 1、p91对应国内什么材质
- 2、p91是什么材质~?
- 3、什么焊工证能焊p91
- 4、P91是什么材质
- 5、P91钢是什么
p91对应国内什么材质
P91钢是一种耐热不起皮钢,一般用于电站锅炉的高温高压场合。相当于国标10Cr9Mo1VNb。
T91/P91(10Cr9Mo1VNb)
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。
标准:ASTM A213 ASTM A335
抗拉强度:≥585(MPa)
屈服强度:≥415(MPa)
伸 长 率:≥20(%)
P91钢是美国国立像树岭实验室和美国燃烧工程公司冶金材料实验室合作研制的新型马氏体耐热钢。它是在9Cr1MoV钢的基础上降低含碳量,严格限制硫、磷的含量,添加少量的钒、铌元素进行合金化。根据ASTM213/A213M-85C,P91钢的化学成份见表1。
与P91钢对应的德国钢号为X10CrMoVNNb91,日本钢号为HCM95,法国则为TUZ10CDVNb0901。
表1 P91钢的
%
元素 含量%
C 0.08-0.12
Mn 0.30-0.60
P ≤0.02
S ≤0.01
Si 0.20-0.50
Cr 8.00-9.50
Mo 0.85-1.05
V 0.18-0.25
Nb 0.06-0.10
N 0.03-0.07
Ni ≤0.40
p91是什么材质~?
p91属于是高压耐高温钢管的一种材质,P91的特点为管道壁厚减薄,在用材上,比其它钢材用材量减少40%以上,而且在节省材料及安装费用上节省30%以上,由于P91管道自重减轻,因此支吊架荷重也相对减小,支吊方便,设计安装也方便,P91在我国电场建设中的应用是很广泛的。
p91焊接
1、全氩弧焊,(TIG打底+TIG填充)
2、氲弧焊采用正确的坡口形状和尺寸。
3、选用合理的焊接材料(TIG焊丝和填充电焊条)。
4、选用正确的焊接规范(包括焊丝及电焊条牌号和直径,钨极直径,焊接电流,氩气流量,电源极性,焊缝层数及道数等)。
5、选用正确的工件预热温度,焊缝层间温度。
6、选用合理的焊后热处理规范(包括升降温速度,回火温度及保温时间等)。
7、坚持正确的接头装配定位焊和熟练,高超的手工操作技能等。
什么焊工证能焊p91
p91 焊工证属于高压焊工,可以从事p91高压管道的焊接工作。焊工证和其他工种的证书是一样的,职业资格证书分为五个等级,初级、中级、高级、 *** 和高级 *** 。
初级 单面焊双面成型 手工平焊。
中级 单面焊双面成型 手工立焊 手工横焊 CO2仰焊。
高级 单面焊双面成型 手工焊接仰焊 要会焊接各种材料钢板 小管要合格 氩弧焊要熟练。
焊工证分为几种
焊工证一般有三种,焊工特种作业操作证、焊工等级资格证、特种设备作业焊工证,常见的也是常用的是焊工操作证和焊工等级证。特种设备焊工证则是专门焊接管道用的,根据管道材质和粗细的不同,办理的具体焊接项目也有所不同。
P91是什么材质
P91属于美标马氏体型耐热钢,执行标准:ASTM A335/A335M-2018
P91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。
P91化学成分如下图:
P91钢是什么
P91属于美标马氏体型耐热钢,执行标准:ASTM A335/A335M-2018
P91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。
P91化学成分如下图:
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