ER312 SS MIG WIRE | FEATURES
- The nominal composition (wt,-%) of ER312 is 30 Cr, 9 Ni.
- Filler metal of ER312 was originally designed to weld cast alloys of similar composition.
- It also has been found to be valuable in welding dissimilar metals such as carbon steel to stainless steel, particularly those grades high in nickel.
- Welding process of ER312 SS MIG wire applied to MIG(Metal Inert Gas Welding) or GMAW(Gas Metal Arc Welding).
SPECIFICATION CONFORMANCES
AWS: A5.9/A5.9M: ER312
UNS Number: S31380
BS EN ISO 14343B: SS312
WELDING POSITIONS
F,V,OH,H
TYPICAL APPLICATION
- ER312 SS MIG wire is used for welding cast alloys of similar composition as well as dissimilar metals including stainless to mild steels.
- The weld deposits exhibit high tensile strength and offer some resistance to abrasion
- Applied to Tool steels, Hard to weld steels, Cast and wrought alloys.
SHIELDING GAS
Argon+2% O2
WIRE COMPOSITION – As Required As per AWS A5.9/A5.9M
| Alloy Type | %C | %Cr | %Ni | %Mo | %Mn | %Si | %P | %S | %Cu | Other |
|---|---|---|---|---|---|---|---|---|---|---|
| ER312 | 0.15max | 28.0-32.0 | 8.0-10.5 | 0.75max | 1.0-2.5 | 0.30-0.65 | 0.03max | 0.03max | 0.75max | – |
| Typical Results | 0.068 | 30.3 | 9.6 | 0.53 | 1.8 | 0.51 | 0.014 | 0.012 | 0.46 | – |
DIAMETER
| INCH | 0.023” | 0.030” | 0.035” | 0.040” | 0.045” | 0.062” |
|---|---|---|---|---|---|---|
| MM | 0.6 | 0.8 | 0.9 | 1.0 | 1.2 | 1.6 |
Standard Package Dimensions and Weights
| Product | Spool Diameter(in) | Spool Diameter(mm) | Nomimal Weight(lbs) | Nominal Weight(kg) |
|---|---|---|---|---|
| Spools | 4 | 100 | 1-1/2, 2-1/2 | 0.7, 1.1 |
| 8 | 200 | 10 | 4.5 | |
| 12 | 300 | 25, 33 | 11.4, 15 | |
| 14 | 350 | 50 | 22.8 |
*Net weights shall be within ±10% of the nominal weight.
TYPICAL MECHANICAL PROPERTIES (As Welded)
| AWS No. | Tensile Strength, min(ksi) | Tensile Strength, min(MPa) | Elongation, min(%) | Heat Treatment |
|---|---|---|---|---|
| ER312 | 95 | 660 | 22 | None |
Available Diameters MIG with Operating Range in Amps
| Diameter(inch) | Diameter(mm) | Amps(A) |
|---|---|---|
| 0.023” | 0.6 | 35 – 70 |
| 0.030” | 0.8 | 50 – 100 |
| 0.035” | 0.9 | 160 – 210 |
| 0.045” | 1.2 | 180 – 250 |
MIG SPOOL DIMENSIONS
| Dimensions of 4, 8 and 12 in [100, 200 and 300 mm] Standard Spools | |||||||||
| Type | Spools Details | 4 in [100mm] | 8 in [200mm] | 12 in [300mm] | 14 in [350mm] | ||||
| inch | mm | inch | mm | inch | mm | inch | mm | ||
| A | Diameter, max | 4.0 | 102 | 8.0 | 203 | 12 | 305 | 14 | 355 |
| B | Width Tolerance | 1.75 ±0.03 |
46 +0，-2 |
2.16 ±0.03 |
56 +0，-3 |
4.0 ±0.06 |
103 +0,-3 |
4.0 ±0.06 |
103 +0,-3 |
| C | Diameter Tolerance | 0.63 +0.01.-0 |
16 +1,-0 |
2.03 +0.06,-0 |
50.5 +2.5,-0 |
2.03 +0.06,-0 |
50.5 +2.5,-0 |
2.03 +0.06,-0 |
50.5 +2.5,-0 |
| D | Diameter between Axes Tolerance | — — |
— — |
1.75 ±0.02 |
44.5 ±0.5 |
1.75 ±0.02 |
44.5 ±0.5 |
1.75 ±0.02 |
44.5 ±0.5 |
| E | Diameter Tolerance | — — |
— — |
0.44 +0,-0.06 |
10 +1,-0 |
0.44 +0,-0.06 |
10 +1,-0 |
0.44 +0,-0.06 |
10 +1,-0 |