ER308/308H焊丝

er316lsi焊丝er308/308h焊丝
不锈钢焊丝
techalloy 307l
(aws无对应)
techalloy 308/308h
(aws 5.9 er308/308h)
techalloy 308/308l
(aws 5.9 er308l)
techalloy 308lhs
(aws a5.9er308l si)
techalloy 309
(aws a5.9 er309)
techalloy 309/309l
(aws a5.9 er309l)
techalloy 309lhs
(aws a5.9 er309lsi)
techalloy 309mol
(aws a5.9 er309lmo)
techalloy 310
(aws a5.9 er310)
techalloy 312
(aws a5.9 er312)
techalloy316/316l
(aws a5.9 er316l)
techalloy 316lhs
(aws a5.9 er316l si)
techalloy 317l
(aws a5.9 er317l)
techalloy 320
(aws a5.9 er320)
techalloy 320lr
(aws a5.9 er320lr)
techalloy 330
(aws a5.9 er330)
techalloy 347
(aws a5.9 er347)
techalloy 385
(aws a5.9 er385)
techalloy 409cb
(aws a5.9 er409cb)
techalloy 410
(aws a5.9 er410)
techalloy410 nimo
aws a5.9 er410nimo
techalloy 430
(aws a5.9 er430)
techalloy 430 lcb
(aws无对应)
techalloy 630
(aws er630)
techalloy 2209
(aws er2209)
techalloy 2594
(aws er2594)
er307l焊丝
lb-52nsu日本神钢焊条 低合金低温钢高强钢焊条进口焊条进口焊丝
西安骏焊专业销售日本神钢焊条焊丝
4.1.  lb-52nsuwhen pipe root pass welding must be conducted from outside rather than inside in order to form the back bead inside the pipe, gtaw or smaw are generally favored. kobe steel has long marketed familiarc™ lb-52u as well as familiarc™ lb-62u for this purpose, and they still serve as kobe’s most reliable, “one and only” products worldwide.
in addition to meeting the always-changing and diverse specifications of pipelines, trustarc™ lb-52nsu has been developed specifically for root pass welding of pipes for low temperature service. it is a covered, low hydrogen type electrode equivalent to aws a5.5 e7016-g. it offers superb notch toughness at -60°c and very low diffusible hydrogen content of about 3.0ml/100g. the chemistries, mechanical properties of all weld metal and diffusible hydrogen content of trustarc™ lb-52nsu are shown in tables 3, 4 and 5 respectively.
table 1: covered electrodes for girth welding
api 5l
pipe
gradewelding
passlow hydrogen typehigh
cellulose
type
vertical
upward
vertical
downward
x42-x52 root lb-52u
lb-52nsu lb-78vs kobe-6010
hot lb-52-18
lb-52ns
filler & cap
x56-x60 root lb-52u
lb-52nsu kobe-6010
kobe-7010s
hot lb-52-18
lb-52ns kobe-7010s
filler & cap
x65 root lb-52u lb-88vs kobe-7010s
kobe-8010s
hot lb-62
lb-62d
filler & cap kobe-8010s
x70 root lb-62u kobe-7010s
kobe-8010s
hot lb-62
lb-62d
filler & cap kobe-8010s
x80 root lb-62u lb-98vs
lb-108vs ——
hot lb-65d
lb-106
filler & cap
x100 root —— lb-118vs ——
hot lb-80l
lb-116
filler & cap
table 2: tig and mag wires for girth welding
api 5l
pipe
gradewelding
passtemperature (°c)
-20 -40 -60
x42-x56 root & hot tg-s50
mx-100t tg-s1n
mx-a55t
filler & cap dw-a50
dw-a50sr dw-a55e
dw-a55esr dw-a55l
dw-a55lsr
dw-a81ni1
x60 root & hot tg-s62 tg-s60a
filler & cap dw-a55e
dw-a55esr dw-a55l
dw-a55lsr
dw-a81ni1
x65 root & hot tg-s62 tg-s60a
filler & cap dw-a55e
dw-a55esr dw-a55l
dw-a55lsr
dw-a81ni1
x70 root & hot tg-s62 tg-s60a
filler & cap dw-a70l dw-a55l
dw-a81ni1
x80 root & hot tg-s80am
filler & cap dw-a70l ——
x100 root & hot tg-s80am
filler & cap dw-a80l —— ——
table 3: chemistries of trustarctm lb-52nsu all weld metal (mass %)
csimnpsnitib
0.06 0.62 1.25 0.016 0.004 0.50 0.014 0.0027
table 4: mechanical properties of trustarctm lb-52nsu all weld metal
tensile propertiesnotch toughness
0.2%
ps
(mpa) ts
(mpa) ei
(%) ra
(%) absorbed energy:j
(brittle fracture: %) fatt
(°c)
-80°c -60°c -40°c
511 598 32 78 43(60)
55(60)
41(60)
av.46(60) 44(55)
72(55)
58(52)
av.58(54) 70(50)
137(35)
144(35)
av.117(40) -53
table 5: diffusible hydrogen content of trustarctm lb-52nsu (ml/100g)
electrode dia (mm)1234ave.
3.2 2.8 3.3 3.5 3.0 3.2
note: tested method: according to aws a4.3.(gas chromatography)
            welding current: 120 a (dcep)
            welding atmosphere: 21°c x rh10%
figure 3: groove shape and pass sequence of butt joint
welding with trustarctm lb-52nsu(root pass only)
and trustarctm lb-52ns
in welding a butt joint on a 25 mm thick plate, 3.2 mm dia. trustarc™ lb-52nsu was used for the root pass with dc 95 amp, and 3.2 mm dia. trustarc™ lb-52ns was used for the second pass onwards with dc 110 amp in the vertical upward . the preheating and interpass temperatures were kept between 115 and 135°c. figure 3 shows the groove shape and the pass sequence and figure 4, the macrostructure of the weld metal. the chemistries and the tensile properties are shown in tables 6 and 7, respectively and the notch toughness properties and the transition curve of the butt joint weld metal are shown in table 8 and figure 5, respectively. (note: both trustarc™ lb-52nsu and trustarc™ lb-52ns are specified as aws a5.5 e7016-g).
figure 4: macrostructure of butt joint weld 
metal
table 6: chemistries of butt joint weld metal (mass %)
locationcsimnpsnitib
face 0.07 0.31 1.40 0.008 0.003 0.50 0.013 0.0022
reverse 0.08 0.30 1.36 0.009 0.003 0.43 0.014 0.0023
table 7: tensile properties of butt joint weld metal
locationtensile properties
center 0.2%ps
(mpa) ts
(mpa) el
(%) ra
(%)
506 577 25 81

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