Description

:root { –arctig-brand-red: #e8380d; –arctig-brand-red-hover: #c42e09; –arctig-brand-red-tint: #fff1ee; –arctig-brand-red-border: #fdd4cb; –arctig-white: #ffffff; –arctig-bg-page: #f5f5f5; –arctig-bg-card: #ffffff; –arctig-bg-stripe: #f9f9f9; –arctig-bg-alt: #f0f0f0; –arctig-border-light: #e6e6e6; –arctig-border-mid: #cccccc; –arctig-text-dark: #1a1a1a; –arctig-text-body: #3d3d3d; –arctig-text-muted: #777777; –arctig-text-faint: #aaaaaa; –arctig-green-best: #1a7a36; –arctig-green-bg: #edf7f1; –arctig-amber-good: #996600; –arctig-amber-bg: #fdf6e3; –arctig-blue-works: #1a5fa8; –arctig-blue-bg: #eef4fc; –arctig-red-avoid: #b52800; –arctig-red-bg: #fdf0ed; –arctig-font-ui: ‘DM Sans’, sans-serif; –arctig-font-data: ‘DM Mono’, monospace; –arctig-radius-lg: 14px; –arctig-shadow-card: 0 1px 3px rgba(0,0,0,0.07), 0 3px 10px rgba(0,0,0,0.05); –arctig-shadow-hover: 0 4px 18px rgba(232,56,13,0.13), 0 2px 8px rgba(0,0,0,0.07); } *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; } .arctig-page { background: var(–arctig-bg-page); font-family: var(–arctig-font-ui); font-size: 15px; color: var(–arctig-text-body); line-height: 1.65; padding-bottom: 64px; } /* ── SECTION TITLES ───────────────────────────────────────── */ .arctig-section-title { font-size: clamp(1.1rem, 2.8vw, 1.55rem); font-weight: 700; color: var(–arctig-text-dark); letter-spacing: -0.02em; margin: 48px 0 20px; padding-bottom: 13px; border-bottom: 2px solid var(–arctig-border-light); position: relative; } .arctig-section-title::after { content: ”; position: absolute; bottom: -2px; left: 0; width: 36px; height: 2px; background: var(–arctig-brand-red); border-radius: 2px; } /* ── COMPATIBLE ALLOYS TABLE ──────────────────────────────── */ .arctig-compat-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(–arctig-radius-lg); border: 1px solid var(–arctig-border-light); box-shadow: var(–arctig-shadow-card); } .arctig-compat-table { width: 100%; min-width: 480px; border-collapse: collapse; background: var(–arctig-bg-card); font-size: 0.875rem; } .arctig-compat-thead-alloy { background: var(–arctig-brand-red); text-align: left; padding: 13px 20px; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(–arctig-white); border-bottom: 2px solid var(–arctig-brand-red-hover); width: 30%; } .arctig-compat-thead-app { background: var(–arctig-brand-red); text-align: left; padding: 13px 20px; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: rgba(255,255,255,0.82); border-bottom: 2px solid var(–arctig-brand-red-hover); width: 38%; } .arctig-compat-thead-rating { background: var(–arctig-brand-red); text-align: center; padding: 13px 20px; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: rgba(255,255,255,0.82); border-bottom: 2px solid var(–arctig-brand-red-hover); width: 32%; } .arctig-compat-cell-alloy { padding: 13px 20px; font-weight: 600; font-size: 0.875rem; color: var(–arctig-text-dark); font-family: var(–arctig-font-data); border-bottom: 1px solid var(–arctig-border-light); background: var(–arctig-bg-card); } .arctig-compat-cell-app { padding: 13px 20px; font-size: 0.86rem; color: var(–arctig-text-muted); border-bottom: 1px solid var(–arctig-border-light); background: var(–arctig-bg-stripe); } .arctig-compat-cell-rating { padding: 13px 20px; text-align: center; font-size: 0.82rem; font-weight: 600; border-bottom: 1px solid var(–arctig-border-light); } .arctig-rating-best { color: var(–arctig-green-best); background: var(–arctig-green-bg); } .arctig-rating-recommended{ color: var(–arctig-amber-good); background: var(–arctig-amber-bg); } .arctig-rating-works { color: var(–arctig-blue-works); background: var(–arctig-blue-bg); } .arctig-rating-avoid { color: var(–arctig-red-avoid); background: var(–arctig-red-bg); } /* ── COMPARISON TABLE ─────────────────────────────────────── */ .arctig-compare-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(–arctig-radius-lg); border: 1px solid var(–arctig-border-light); box-shadow: var(–arctig-shadow-card); } .arctig-compare-table { width: 100%; min-width: 500px; border-collapse: collapse; background: var(–arctig-bg-card); font-size: 0.875rem; } .arctig-cmp-thead-feature { background: var(–arctig-bg-alt); text-align: left; padding: 13px 18px; font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(–arctig-text-muted); border-bottom: 2px solid var(–arctig-border-mid); width: 28%; } .arctig-cmp-thead-er4043 { background: var(–arctig-brand-red); text-align: center; padding: 13px 18px; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(–arctig-white); border-bottom: 2px solid var(–arctig-brand-red-hover); width: 36%; } .arctig-cmp-thead-er5356 { background: var(–arctig-bg-alt); text-align: center; padding: 13px 18px; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(–arctig-text-muted); border-bottom: 2px solid var(–arctig-border-mid); width: 36%; } .arctig-cmp-cell-label { padding: 12px 18px; font-weight: 600; font-size: 0.86rem; color: var(–arctig-text-dark); border-bottom: 1px solid var(–arctig-border-light); background: var(–arctig-bg-card); } .arctig-cmp-cell-er4043 { padding: 12px 18px; text-align: center; font-size: 0.875rem; background: var(–arctig-brand-red-tint); border-bottom: 1px solid var(–arctig-brand-red-border); color: var(–arctig-text-dark); line-height: 1.45; } .arctig-cmp-cell-er5356 { padding: 12px 18px; text-align: center; font-size: 0.875rem; background: var(–arctig-bg-card); border-bottom: 1px solid var(–arctig-border-light); color: var(–arctig-text-muted); line-height: 1.45; } .arctig-cmp-value-mono { font-family: var(–arctig-font-data); font-size: 0.85rem !important; font-weight: 600; color: var(–arctig-brand-red) !important; } /* ── SPEC TABLE ───────────────────────────────────────────── */ .arctig-spec-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(–arctig-radius-lg); border: 1px solid var(–arctig-border-light); box-shadow: var(–arctig-shadow-card); } .arctig-spec-table { width: 100%; min-width: 340px; border-collapse: collapse; background: var(–arctig-bg-card); font-size: 0.875rem; } .arctig-spec-thead-key { background: var(–arctig-brand-red); text-align: left; padding: 13px 20px; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: var(–arctig-white); border-bottom: 2px solid var(–arctig-brand-red-hover); width: 36%; } .arctig-spec-thead-val { background: var(–arctig-brand-red); padding: 13px 20px; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.09em; text-transform: uppercase; color: rgba(255,255,255,0.78); border-bottom: 2px solid var(–arctig-brand-red-hover); } .arctig-spec-cell-key { padding: 12px 20px; font-weight: 600; font-size: 0.83rem; color: var(–arctig-text-body); background: var(–arctig-bg-alt); border-bottom: 1px solid var(–arctig-border-light); vertical-align: top; } .arctig-spec-cell-val { padding: 12px 20px; font-size: 0.875rem; color: var(–arctig-text-dark); background: var(–arctig-bg-card); border-bottom: 1px solid var(–arctig-border-light); line-height: 1.5; } /* ── IMAGES — original inline flow ───────────────────────── */ .arctig-image-row { margin-top: 32px; font-size: 0; line-height: 0; } .arctig-product-img { display: inline-block; width: 100%; max-width: 100%; vertical-align: top; } /* ── RESPONSIVE ───────────────────────────────────────────── */ @media (max-width: 640px) { .arctig-section-title { font-size: 1.1rem; margin: 36px 0 16px; } .arctig-compat-cell-alloy, .arctig-compat-cell-app, .arctig-compat-cell-rating, .arctig-compat-thead-alloy, .arctig-compat-thead-app, .arctig-compat-thead-rating, .arctig-cmp-cell-label, .arctig-cmp-cell-er4043, .arctig-cmp-cell-er5356, .arctig-cmp-thead-feature, .arctig-cmp-thead-er4043, .arctig-cmp-thead-er5356 { padding: 10px 12px; font-size: 0.8rem; } }

Compatible Aluminum Alloys for ER4043

Aluminum Alloy Typical Applications ER4043 Compatibility
6061-T6 / 6061-T651 Structural frames, extrusions, bike frames Best Choice
6063 Architectural tubing, window frames Best Choice
3003 / 3004 Sheet metal, tanks, cookware
5052 Marine sheet, general fabrication Works Well
Casting Alloys (355, 356, 214, 43) Cast aluminum repair
5083 / 5086 / 5456 Marine structural, high-magnesium alloys Use ER5356 Instead

ER4043 vs ER5356 — Which Aluminum Filler Rod Should You Choose?

Feature ER4043 — This Product ER5356
Best For 6061, 6063, 3xxx series, aluminum castings 5xxx series, marine, structural applications
Weld Pool Control Smooth and fluid, easy to control Slightly thicker weld pool
Hot Crack Resistance Excellent for 6xxx alloys Lower when welding 6xxx alloys
Weld Appearance Bright, smooth, shiny finish Slightly dull or frosty appearance
After Anodizing Weld area may appear darker Better color match with base metal
High-Temp Service (>150°F / 66°C) Acceptable Not recommended
Tensile Strength ~186 MPa ~241 MPa (Higher strength)

ER4043 Aluminum TIG Filler Rod Specifications

Specification Details
AWS Classification ER4043 · AWS A5.10 / ASME SFA A5.10
Also Known As AlSi5 · 4043 Aluminum Filler Rod
Silicon Content (Si) 4.5 – 6.0%
Available Diameters 1/16″ (1.6 mm) · 3/32″ (2.4 mm) · 1/8″ (3.2 mm)
Rod Length 16 in (406 mm)
Package Weight 5 lb
Shielding Gas 100% Argon · Argon/Helium Mix
Welding Process GTAW (TIG Welding)
Storage Recommendation Store in sealed plastic tube and keep dry

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Additional information

Size

1/16"(1.6mm) x 16" 5LB, 3/32"(2.4mm) x 16" 5LB, 1/8"(3.2mm) x 16" 5LB

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