Type
Basic flux cored stainless steel welding wire for M21 and M20 gas. (Type 25 20)
classification
AWS
A 5.22: E310T0-4
EN ISO
17633-A: T 25 20 B M21 3
W.Nr.
1.4842
Applications

Common applications include industrial furnaces, annealing chambers, fused salt treatment installations and boiler parts, as well as heat exchangers Especially where rutile flux cored wire gives a to high risk for cracking this basic type is a better choice

Type
Basic flux cored stainless steel welding wire for M21 and M20 gas. (Type 25 20)
Applications

Common applications include industrial furnaces, annealing chambers, fused salt treatment installations and boiler parts, as well as heat exchangers Especially where rutile flux cored wire gives a to high risk for cracking this basic type is a better choice

Properties

For welding heat-resistant austenitic steels of the 25% Cr, 20% Ni types. AA 310B has good general oxidation resistance, especially at high temperatures, due to its high Cr content. The alloy is fully austenitic and is therefore sensitive to hot cracking. The temperature limits for use under intermittent oxidation depend on cycle frequency. In no case shall a temperature of 1000°C be exceeded. This alloy can withstand relatively severe thermic shock, and is superior to type 309L

Classification
AWS
A 5.22: E310T0-4
EN ISO
17633-A: T 25 20 B M21 3
F-nr
6
FM
5
W.Nr.
1.4842
Suitable for

ISO 15608: 8.1  Austenitic ≤ 19 % Cr , TÜV 1000: Gr. 21-30,  Type: 25% Cr, 22%Ni 

1.4710, 1.4713, 1.4724, 1.4726, 1.4742, 1.4745, 1.4762, 1.4823, 1.4826, 1.4828, 1.4832, 1.4835,1.4837, 1.4840, 1.4841, 1.4845, 1.4846, 1.4848, 1.4849, 253MA,

X15CrNiSi 25 20, G-X40CrNiSi 25 12, G-X15CrNi 25 20, X8CrNi25-21

AISI 305, 310, 314 ASTM A297 HF / A297HJ 

Approvals
CE
Welding positions
PA
PB
PC
Redrying
Not required
Gas acc. EN ISO 14175
M20, M21
Analysis
C Si Mn P Cr Ni Mo N Cu Nb+Ta S
0.1 0.5 2.5 25.5 21
Mechanical Properties
Heat
Treatment
RP0,2
(MPa)
Rm
(MPa)
A5
(%)
Impact Energy (J) ISO-V Hardness
RT
As Welded 400 590 30 80 HRc