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OP 71 Cr
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EIN 760
SA FB 2 63 DC
DIN 32 522
B FB 5 63745 DC 8 K
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Type/
Characteristics:
Special
agglomerated
fluoride-basic
type flux of
extra low carbon
quantity for
welding
austenitic
stainless and
heat resistant
steels in
combination with
wire electrode
according to DIN
8556.
Owning to its
metallurgical
behavior In
terms of carbon,
AMA OP 71 Cr is
substances
counteracting
chromium
burn-off.
AMA OP 71 Cr is
characterized by
causing a mean
silicon pick-up
and a slight
manganese
burn-off. It
produces smooth
and finely
ripped weld
beads merging
into the base
metal without
undercut.
Owning to
excellent slag
removal, AMA OP
71 Cr is well
suited for
fillet welding.
AMA OP 71 Cr can
be used on DC
(positive) up to
800 ˚C. Damp
flux shall be
redried by
backing at 300
350 ˚C. Grain
size according
to DIN 32
522:2-20. |
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Main constituents:
|
SiO2+TiO2 |
CaO+MgO |
Al203 + MnO |
CaF2 |
|
|
%30 |
%30 |
%10 |
%25 |
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Basicity to boniszewsk:
~1.6
All-Weld metal
analysis (typical
values):
|
Weight-% |
|
|
With
Wire electrode |
C |
Cr |
Ni |
Mo |
Nb |
|
|
|
30-51 |
<0.03 |
>18 |
>9 |
- |
- |
|
30-52 |
<0.07 |
>18 |
>9 |
- |
>8 x C |
|
30-53 |
<0.03 |
>18 |
>10 |
>2.5 |
- |
|
30-54 |
<0.07 |
>18 |
>10 |
>2.5 |
>8 x C |
Mechanical properties
of all-weld metal (typical
values) :
|
With Wire electrode |
Tensile strength
(N/mm2) |
1% Proof Stress
(N/mm2) |
0.2% Proof stress
(N/mm2) |
Elongation
Lo=5d(%) |
ISO-V Impact
energy (j)
+200C |
|
|
30-51 |
>550 |
>350 |
>320 |
>35 |
>75 |
|
|
30-52 |
>575 |
>370 |
>350 |
>30 |
>65 |
|
|
30-53 |
>550 |
>350 |
>320 |
>30 |
>75 |
|
|
30-54 |
>600 |
>370 |
>350 |
>30 |
>65 |
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Application:
joint welding of
austenitic stainless Cr
Ni steel, preferably for
thinner plates.
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Materials |
Material-No. |
With wire electrode |
Material-No. |
|
|
X 2 Cr Ni 1911 |
1.4306 |
30-51 |
1.4316 |
|
X 5 Cr Ni 1810 |
1.4301 |
30-51 |
1.4316 |
|
X 6 Cr Ni Ti 1810 |
1.4541 |
30-52 |
1.4551 |
|
X 5 Cr Ni Nb 189 |
1.4543 |
30-52 |
1.4551 |
|
X 6 Cr Ni Nb 1810 |
1.4550 |
30-52 |
1.4551 |
|
X 12 Cr Ni Ti 189 |
1.4878 |
30-52 |
1.4551 |
|
X 2 Cr Ni Mo 17132 |
1.4404 |
30-53 |
1.4430 |
|
X 2 Cr Ni Mo 18143 |
1.4435 |
30-53 |
1.4430 |
|
X 5 Cr Ni Mo 17122 |
1.4401 |
30-53 |
1.4430 |
|
X 6 Cr Ni Mo Ti 17122 |
1.4571 |
30-54 |
1.4576 |
|
X 10 Cr Ni Mo Ti 1812 |
1.4573 |
30-54 |
1.4576 |
|
X 6 Cr Ni Mo Nb 17122 |
1.4580 |
30-54 |
1.4576 |
|
C 10 Cr Ni Mo Nb 1812 |
1.4583 |
30.54 |
1.4576 |
|
HI, HII, 17 Mn 4 |
- |
30-55 |
~1.4462 |
|
Joined to: |
- |
- |
- |
|
X 6 Cr Ni Nb 1810 |
1.4550 |
- |
- |
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