Wire Feed Speed Calculator

Select wire diameter and enter amperage to look up published Lincoln SuperArc L-56 operating-procedure rows. Returns Wire Feed Speed (ipm), voltage, and melt-off rate as bucketed range bands against the vendor envelope. Scope: carbon steel ER70S-6 solid wire; published gas / transfer-mode combinations only; no interpolation between Lincoln rows.

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Scope: This calculator returns Lincoln SuperArc L-56 (AWS A5.18 / ER70S-6) published operating-procedure rows for carbon steel solid wire only. Short-Circuit Transfer assumes 100% CO2 shielding; Spray Transfer assumes 90% Ar / 10% CO2 shielding. Polarity is DC electrode positive for all rows. Other gas blends, transfer modes, wire chemistries (stainless, aluminum, low-alloy, metal-cored, flux-cored), and base-metal alloys require their own vendor procedure tables.

Wire Diameter Welding Current (amps)

Understanding Your Result

How the Bucketed Range Works

The Lincoln SuperArc L-56 Typical Operating Procedures table publishes three operating points per wire diameter and transfer mode. Each point is a complete tuple: Wire Feed Speed (ipm), voltage (V), amperage (A), and melt-off rate (lb/hr). When your amperage input falls between two published Lincoln rows, this calculator brackets your input and shows the WFS range spanning those two rows. When your amperage matches a published row exactly, the bracket collapses to that single row.

Procedures in these areas are procedures for short circuiting mode using 100% CO2. When using 75% Argon, 25% CO2 for short circuit transfer, reduce voltage by 1 to 2 volts.
Lincoln SuperArc L-56 Product Technical Data Sheet, Typical Operating Procedures table footnote (6)

This calculator does not extrapolate beyond Lincoln's published envelope. If your amperage is below the smallest published value for the selected wire and mode, the result shows an out-of-range badge with guidance to consider a smaller wire or a different transfer mode. If above the largest published value, the result suggests increasing wire diameter. Operating outside the published envelope means working without vendor-tested procedure data; consult your shop's WPS or the wire manufacturer's technical support.

From the Code

Source Citation

This calculator's encoded values trace directly to the Lincoln SuperArc L-56 Product Technical Data Sheet, an AWS A5.18 / ER70S-6 carbon-steel solid wire. The Typical Operating Procedures table publishes 21 operating-point rows across 7 wire-diameter and transfer-mode combinations (0.030 SC, 0.035 SC, 0.035 SP, 0.045 SC, 0.045 SP, 0.052 SP, 1/16-in SP). All rows are encoded verbatim with per-row anti-fact tests pinning each value.

Document fingerprint — Published 2012-02-06; SHA256 b45ea7b8c8d1b59152a3907f8f91b29c53c29fdcef09ab931133a4dfb0d683a1; 247,322 bytes. Independently verified via two byte-identical Home Depot CDN mirrors of the same Lincoln document, confirming the procedure table has not been silently mutated since publication. A separate Lincoln content-delivery copy returned the same procedure-table values in a different document layout.

Wire conformance — Lincoln SuperArc L-56 conforms to AWS A5.18 and is classified as ER70S-6. AWS A5.18 specifies the chemistry and minimum tensile / yield / elongation / impact values for the classification; vendor procedure tables like Lincoln's go beyond the standard to publish typical operating points for shop use. Other ER70S-6 wires from other manufacturers will have similar but not identical operating envelopes. This calculator encodes Lincoln's specific published table; substituting a different ER70S-6 wire requires that manufacturer's own procedure data.

Worked Examples

Three Reference Lookups

Verify your inputs against these reference lookups. All three use the encoded Lincoln SuperArc L-56 Typical Operating Procedures rows.

Example 1 — 0.035 wire, 175 A. Matches Lincoln's published Short-Circuit Transfer row for 0.035 in (0.9 mm) at 250 ipm / 22 V / 175 A / 4.0 lb/hr exactly. In-range badge: yes (Lincoln SC envelope for 0.035 wire is 80-175 A). The result card shows all three SC rows for 0.035 wire plus all three Spray Transfer rows (375-600 ipm / 195-275 A) so the user can see the full operating window for this wire diameter.

Example 2 — 0.045 wire, 310 A. Falls between Lincoln's published Spray Transfer rows for 0.045 in (1.1 mm) at 285 A (350 ipm) and 335 A (475 ipm). In-range badge: yes (Lincoln SP envelope for 0.045 wire is 285-340 A). WFS bracket: 350-475 ipm. The result card shows all three SP rows plus, for context, the three SC rows for the same wire (145-200 A, 125-200 ipm) so the user sees both transfer modes.

Example 3 — 0.062 wire, 500 A. Above Lincoln's published Spray Transfer envelope for 1/16 in (1.6 mm) wire, which caps at 430 A (290 ipm). Out-of-range badge with guidance to verify against shop WPS or contact Lincoln Applications Engineering. The result card still shows all three published rows so the user sees how far above the envelope they are.

Common Questions

FAQ

What wire types does this calculator cover?

This calculator returns published operating-procedure rows for Lincoln SuperArc L-56, an AWS A5.18 / ER70S-6 carbon-steel solid wire. Wire diameters covered are 0.030, 0.035, 0.045, 0.052, and 0.062 in (1/16 in, 1.6 mm). Short-Circuit Transfer is shown for 0.030, 0.035, and 0.045 wire with 100% CO2 shielding, and Spray Transfer is shown for 0.035, 0.045, 0.052, and 0.062 wire with 90% argon / 10% CO2 shielding. Other gas blends, transfer modes, wire chemistries, and base-metal alloys require their own vendor procedure tables. Stainless steel, aluminum, low-alloy, metal-cored, and flux-cored wires are out of scope. Polarity is DC electrode positive for all rows shown.

Why bucketed ranges instead of a single WFS number?

The Lincoln SuperArc L-56 Typical Operating Procedures table publishes three operating points per wire diameter and transfer mode, each as a complete tuple of Wire Feed Speed, voltage, amperage, and melt-off rate. Lincoln does not state that wire feed speed scales linearly with amperage between published rows, so this calculator does not interpolate between them. Instead, when your amperage input falls between two published Lincoln rows, the calculator brackets your input and shows the WFS range spanning those two rows. Every number on the result card traces back to a specific Lincoln published row. The trade-off is intentional: no fabricated interpolated point estimates, even at the cost of presenting a range rather than a single value. For a single-point estimate, your shop's Welding Procedure Specification is the right reference, not this calculator.

What if my amperage is outside Lincoln's published range?

If your amperage input falls below Lincoln's smallest published value for the selected wire and transfer mode, the calculator shows an out-of-range badge with guidance to consider a smaller wire diameter or the short-circuit transfer mode if available. If your amperage is above Lincoln's largest published value, the calculator suggests increasing wire diameter. The calculator does not extrapolate beyond published Lincoln data because vendor procedure tables stop where the vendor's tested envelope stops. For amperages outside the published envelope, you are operating without vendor-published procedure data and should consult your shop's WPS or the wire manufacturer's technical support.

Does Lincoln publish curves for other gas blends or transfer modes?

The Lincoln SuperArc L-56 Typical Operating Procedures table publishes Short-Circuit Transfer with 100% CO2 and Spray Transfer with 90% Ar / 10% CO2. Other documented combinations exist in Lincoln's broader literature but are not in this calculator's encoded data. A footnote on the source table notes that when using 75% argon / 25% CO2 for short-circuit transfer, voltage should be reduced by 1 to 2 volts compared to the 100% CO2 values shown. Pulsed spray transfer (GMAW-P) is a separate process with its own waveform-specific procedures not covered by the steady-state table this calculator references. For other gas blends, refer to the Lincoln SuperArc L-56 Product Technical Data Sheet directly or contact Lincoln Applications Engineering.

Why is voltage shown alongside WFS and amperage?

In gas metal arc welding, wire feed speed, voltage, and amperage are coupled by the constant-voltage power-source dynamic, the wire feeder drive ratio, and the electrode extension (stickout). Lincoln publishes operating-procedure rows as complete tuples because changing any one parameter without adjusting the others moves the operating point off Lincoln's tested envelope. The voltage shown is what Lincoln tested at the corresponding WFS and amperage; using a different voltage at the same WFS will shift the actual amperage, which may push the arc outside the documented spray-transfer or short-circuit envelope. For shop use, set the voltage Lincoln shows for the operating point you want, then verify amperage on the power source matches the published value within instrument tolerance.

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Lincoln SuperArc L-56 · AWS A5.18 / ER70S-6 · TDS published 2012-02-06