Composition of welding flux(%) | |||||
SiO2+TiO2 | CaO+MgO | Al2O3+MnO | CaF2 | S | P |
15-25 | 25-35 | 20-30 | 18-25 | ≤0.06 | ≤0.08 |
Chemical Compostion of Deposited Metal (%) | Mechanical Properties of Deposited Metal(Standard&Typical) | ||||||||||||||
C | Mn | Si | S | P | Cr | Ni | Mo | Cu | Yield point ReL(MPa) | Tensile strength Rm(MPa) | Elongation A(%) | Akv Value (J) | Application | ||
AWS A5.17 F6A4/EM12 | Standard | - | - | - | - | - | - | - | - | - | ≥330 | 415-550 | ≥22 | -40ºC≥27 | for welding 450MPa grade mild steels, LPG cylinders.etc |
Typical | 0.046 | 1.14 | 0.26 | 0.014 | 0.018 | 0.040 | 0.011 | - | 0.050 | 370 | 472 | 28 | 118 | ||
AWS A5.17 F7A2/EM12 | Standard | - | - | - | - | - | - | - | - | - | ≥400 | 480-650 | ≥22 | -30ºC≥27 |
for welding 500MPa-600MPa grade high strength steel structures , such as ship hulls,bridges,
pressure vessels, as well as H-beam structures. |
Typical | 0.051 | 1.58 | 0.32 | 0.011 | 0.021 | 0.015 | 0.004 | - | 0.040 | 441 | 542 | 30 | 109 | ||
AWS A5.17 F7A2/EM13k | Standard | - | - | - | - | - | - | - | - | - | ≥400 | 480-650 | ≥22 | -30ºC≥27 | for welding 500MPa-600MPa grade high strength steel structures , such as bridges,pressure vessels, as well as H-beam structures. |
Typical | 0.053 | 1.34 | 0.67 | 0.010 | 0.024 | 0.017 | 0.044 | 0.001 | 0.119 | 500 | 586 | 29 | 89 | ||
AWS A5.23
F8A0/EA-A4 |
Standard | - | - | - | - | - | - | - | - | - | ≥470 | 550-700 | ≥20 | -20ºC≥27 | for welding 550MPa grade important high strength steel structures ,especially for spiral or longitudinal welded huge diameter pipe made by X65,X70 or X80 steels.It could be 4 wires welding at same time and the welding speed is 1.70m-2.00mper minute. |
Typical | 0.060 | 1.58 | 0.41 | 0.005 | 0.016 | 0.060 | 0.080 | 0.360 | 0.220 | 546 | 636 | 26 | 120 | ||
AWS A5.23
F8P2/EA-A4 |
Standard | - | - | - | - | - | - | - | - | - | ≥490 | ≥610 | ≥20 | -30ºC≥50 | specially for jumbo oil reserving tanks and the welded beam has higher low temperature toughness due toit contains oppotune Mo&Ti. |
Typical | 0.060 | 1.58 | 0.40 | 0.005 | 0.017 | 0.025 | 0.030 | 0.41 | Ti 0.041 Cu 0.180 | 545 | 635 | 26 | 83 | ||
AWS A5.17 F7A4/EM12k | Standard | - | - | - | - | - | - | - | - | - | ≥400 | 480-650 | ≥22 | -40ºC≥27 | widely used in structures fabricated by mild steel and low alloy steels eg.ships. |
Typical | 0.060 | 1.30 | 0.30 | 0.010 | 0.020 | 0.020 | 0.010 | - | 0.050 | 420 | 510 | 30 | 110 |