Ultra low carbon stainless steel welded strip for EXTRA surfacing
EQ308L EQ308LMo EQ309L EQ308LA EQ347L
Features: these alloys have better corrosion resistance, higher mechanical strength and weldability. Stainless steel band for pressure vessel welding.
1、Typical chemical components
| Grade | C | Si | Mn | P | S | Cr | Ni | Mo | Cu | Nb | Fe |
| EQ308L | 0.020 | 0.50 | 2.0 | 0.010 | 0.008 | 20.0 | 10.0 | ≤0.75 | more than | ||
| EQ308LMo | 0.020 | 0.50 | 2.0 | 0.010 | 0.008 | 20.0 | 10.0 | 2.50 | ≤0.75 | more than | |
| EQ309L | 0.020 | 0.50 | 2.0 | 0.010 | 0.008 | 24.0 | 13.0 | more than | |||
| EQ308LA | 0.020 | 0.50 | 2.0 | 0.010 | 0.008 | 22.0 | 11.0 | ≤0.75 | more than | ||
| EQ347L | 0.020 | 0.50 | 2.0 | 0.010 | 0.008 | 20.0 | 10.0 | ≤0.75 | 0.6 | more than |
2、Physical property
| Grade | Density（g/cm3） | Modulus of elasticity（Mpa） | Mean linear thermal expansion coefficient（10-6/℃） | Resistivity（μΩ.cm） | Specific heat（J/kg·℃） | Thermal conductivity（W/m.℃） |
| EQ308L | 7.9 | 200x103 | 16.0 | 78 | 540 | 16.4 |
| EQ308LMo | 7.92 | 200x103 | 16.0 | 80 | 540 | 16.2 |
| EQ309L | 7.9 | 200x103 | 17.0 | 82 | 540 | 18.5 |
| EQ308LA | 7.9 | 200x103 | 16.0 | 80 | 540 | 16.2 |
| EQ347L | 7.9 | 200x103 | 16.0 | 78 | 540 | 16.2 |
3、Mechanical property
| Yield strength（Mpa） | Tensile strength（Mpa） | Elongation（%） | Hardness（Hv） | ||
EQ308L EQ308LA EQ347L | Cold state | 240-270 | 540-600 | 50-60 | 170-200 |
| Soft state | 400-435 | 800-870 | 15-22 | 230-280 | |
EQ308LMo EQ309L | Cold state | 260-280 | 600-660 | 50-58 | 180-200 |
| Soft state | 420-450 | 820-890 | 18-22 | 240-290 |
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