{"id":8304,"date":"2025-03-15T06:38:03","date_gmt":"2025-03-15T06:38:03","guid":{"rendered":"https:\/\/premiumalu.com\/?post_type=product&#038;p=8304"},"modified":"2026-07-07T08:32:48","modified_gmt":"2026-07-07T08:32:48","slug":"4045-%ec%95%8c%eb%a3%a8%eb%af%b8%eb%8a%84-%ed%95%a9%ea%b8%88","status":"publish","type":"product","link":"https:\/\/premiumalu.com\/ko\/%ec%a0%9c%ed%92%88\/4045-%ec%95%8c%eb%a3%a8%eb%af%b8%eb%8a%84-%ed%95%a9%ea%b8%88\/","title":{"rendered":"4045 \uc54c\ub8e8\ubbf8\ub284 \ud569\uae08"},"content":{"rendered":"<h2>What Is 4045 Aluminum Alloy?<\/h2>\n<p>4045 aluminum alloy (UNS A94045, EN AW-4045 \/ AlSi10) is a heat-treatable wrought aluminum alloy in the 4000 series, primarily alloyed with silicon at 9\u201311%. The high silicon content lowers the melting range and provides excellent fluidity during brazing, while reducing solidification shrinkage \u2014 properties that make 4045 one of the most widely used aluminum brazing and filler alloys.<\/p>\n<p>Unlike structural alloys such as 6061 or 7075, 4045 is not designed for load-bearing applications. Its value lies in its metallurgical behavior as a filler: it flows cleanly into joints, wets aluminum substrates well, and produces sound brazed assemblies with minimal cracking. 4045 is commonly supplied as brazing sheet (often as a cladding layer on 3003, 3005, or 6951 core alloys), as filler wire for gas welding and brazing, and as foil for heat-exchanger fabrication.<\/p>\n<p>4045 is covered under major international standards including ASTM B209 (sheet and plate), ASTM B211 (bar, rod, and wire), ISO 6361, and EN 573-3. Its European designation is EN AW-4045 \/ AlSi10(A).<\/p>\n<h2>Available 4045 Aluminum Products<\/h2>\n<p>Linsy supplies 4045 aluminum in standard and custom product forms tailored to brazing, welding, and heat-exchanger applications. Dimensions and tolerances can be customized to your project requirements.<\/p>\n<h3>4045 Aluminum Brazing Sheet &amp; Coil<\/h3>\n<table>\n<thead>\n<tr>\n<th>\uc591\uc2dd<\/th>\n<th>\uc131\uc9c8<\/th>\n<th>\ub450\uaed8(mm)<\/th>\n<th>\ub108\ube44(mm)<\/th>\n<th>\uae38\uc774(mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>4045 Brazing Sheet \/ Coil<\/td>\n<td>F, O<\/td>\n<td>0.1 \u2013 4.0<\/td>\n<td>500 \u2013 1600<\/td>\n<td>500 \u2013 6000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>4045 brazing sheet is frequently supplied as clad composite (4045 clad on a 3xxx or 6xxx-series core) for heat-exchanger fabrication. Both single-sided and double-sided clad constructions can be quoted on request.<\/p>\n<h3>4045 Aluminum Filler Wire<\/h3>\n<table>\n<thead>\n<tr>\n<th>\ub9e4\uac1c\ubcc0\uc218<\/th>\n<th>\uc0ac\uc591<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\uc9c0\ub984<\/td>\n<td>0.8 \u2013 5.0 mm<\/td>\n<\/tr>\n<tr>\n<td>\uc131\uc9c8<\/td>\n<td>F, O<\/td>\n<\/tr>\n<tr>\n<td>\ucf54\uc77c \uc911\ub7c9<\/td>\n<td>Min 20 kg<\/td>\n<\/tr>\n<tr>\n<td>\ud06c\uae30 \ud5c8\uc6a9 \uc624\ucc28<\/td>\n<td>\u00b1 0.03 mm<\/td>\n<\/tr>\n<tr>\n<td>\ud45c\uba74<\/td>\n<td>Clean, dry, spooled or straightened<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>4045 filler wire is used for brazing and gas welding of aluminum assemblies where good flow and joint fill are required. It is an alternative to 4047 (higher silicon, lower melting range) when a slightly broader melting interval is acceptable.<\/p>\n<h3>4045 Aluminum Foil<\/h3>\n<table>\n<thead>\n<tr>\n<th>\uc591\uc2dd<\/th>\n<th>\uc131\uc9c8<\/th>\n<th>\ub450\uaed8(mm)<\/th>\n<th>\ub108\ube44(mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>4045 Foil<\/td>\n<td>O<\/td>\n<td>0.05 \u2013 0.3<\/td>\n<td>50 \u2013 1200<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>4045 Aluminum Bar<\/h3>\n<table>\n<thead>\n<tr>\n<th>\uc591\uc2dd<\/th>\n<th>\uc131\uc9c8<\/th>\n<th>\uc9c0\ub984(mm)<\/th>\n<th>\uae38\uc774(mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>4045 Round Bar<\/td>\n<td>F, O<\/td>\n<td>3 \u2013 100<\/td>\n<td>1000 \u2013 6000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>4045 bar is less common than sheet or wire but is available for applications requiring machining stock or brazing preforms. Contact Linsy to confirm availability for your required size range.<\/p>\n<h3>Other Forms \u2014 Tube &amp; Custom Shapes<\/h3>\n<p>4045 tube and custom profiles can be quoted on request for specialized brazing assemblies or preform applications. Because 4045 is primarily a filler and cladding alloy, tube availability is limited compared to structural grades. Please share your drawing or specification for a feasibility review.<\/p>\n<h2>4045 Specifications &amp; Equivalent Designations<\/h2>\n<table>\n<thead>\n<tr>\n<th>\ud45c\uc900 \uc2dc\uc2a4\ud15c<\/th>\n<th>\uba85\uce6d<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>UNS<\/td>\n<td>A94045<\/td>\n<\/tr>\n<tr>\n<td>EN AW<\/td>\n<td>EN AW-4045 \/ AlSi10(A)<\/td>\n<\/tr>\n<tr>\n<td>ISO<\/td>\n<td>Al Si10<\/td>\n<\/tr>\n<tr>\n<td>AA \/ SAE<\/td>\n<td>4045<\/td>\n<\/tr>\n<tr>\n<td>JIS (\uc77c\ubcf8)<\/td>\n<td>A4045<\/td>\n<\/tr>\n<tr>\n<td>GB \/ \uc911\uad6d\uc5b4<\/td>\n<td>4045<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\uc77c\ubc18\uc801\uc73c\ub85c \uc801\uc6a9\ub418\ub294 \ud45c\uc900:<\/p>\n<ul>\n<li>ASTM B209 \u2014 \uc54c\ub8e8\ubbf8\ub284 \ubc0f \uc54c\ub8e8\ubbf8\ub284 \ud569\uae08 \uc2dc\ud2b8 \ubc0f \ud310<\/li>\n<li>ASTM B211 \u2014 \uc54c\ub8e8\ubbf8\ub284 \ubc0f \uc54c\ub8e8\ubbf8\ub284 \ud569\uae08 \ubd09, \ub9c9\ub300 \ubc0f \uc120\uc7ac<\/li>\n<li>ISO 6361 \u2014 \ub2e8\uc870 \uc54c\ub8e8\ubbf8\ub284 \ubc0f \uc54c\ub8e8\ubbf8\ub284 \ud569\uae08 \uc2dc\ud2b8, \uc2a4\ud2b8\ub9bd \ubc0f \ud310<\/li>\n<li>EN 573-3 \u2014 \uac00\uacf5 \uc81c\ud488\uc758 \ud654\ud559 \uc131\ubd84 \ubc0f \ud615\ud0dc<\/li>\n<li>AWS A5.10 \u2014 Welding consumables reference (for filler wire applications)<\/li>\n<\/ul>\n<h2>Chemical Composition of 4045 Aluminum<\/h2>\n<p>Composition limits per ASTM \/ EN standards (weight %):<\/p>\n<table>\n<thead>\n<tr>\n<th>\uc694\uc18c<\/th>\n<th>Min %<\/th>\n<th>Max %<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\uc2e4\ub9ac\ucf58(Si)<\/td>\n<td>9.0<\/td>\n<td>11.0<\/td>\n<\/tr>\n<tr>\n<td>\ucca0(Fe)<\/td>\n<td>\u2014<\/td>\n<td>0.8<\/td>\n<\/tr>\n<tr>\n<td>\uad6c\ub9ac(Cu)<\/td>\n<td>\u2014<\/td>\n<td>0.30<\/td>\n<\/tr>\n<tr>\n<td>\ub9dd\uac04(Mn)<\/td>\n<td>\u2014<\/td>\n<td>0.30<\/td>\n<\/tr>\n<tr>\n<td>\ub9c8\uadf8\ub124\uc298(Mg)<\/td>\n<td>\u2014<\/td>\n<td>0.30<\/td>\n<\/tr>\n<tr>\n<td>\uc544\uc5f0(Zn)<\/td>\n<td>\u2014<\/td>\n<td>0.20<\/td>\n<\/tr>\n<tr>\n<td>\ud2f0\ud0c0\ub284(Ti)<\/td>\n<td>\u2014<\/td>\n<td>0.20<\/td>\n<\/tr>\n<tr>\n<td>\uadf8 \uc678, \uac01\uac01<\/td>\n<td>\u2014<\/td>\n<td>0.05<\/td>\n<\/tr>\n<tr>\n<td>\uae30\ud0c0, \ud569\uacc4<\/td>\n<td>\u2014<\/td>\n<td>0.15<\/td>\n<\/tr>\n<tr>\n<td>\uc54c\ub8e8\ubbf8\ub284(Al)<\/td>\n<td colspan=\"2\">Remainder (\u2248 87.0 \u2013 89.5)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The high silicon content is the defining feature of 4045. Silicon lowers the melting range to approximately 577\u2013632 \u00b0C (1071\u20131170 \u00b0F), enabling 4045 to melt and flow before the core alloy in brazed assemblies \u2014 this is why it is widely used as a cladding and filler material.<\/p>\n<h2>Mechanical Properties of 4045 Aluminum<\/h2>\n<p>4045 is a filler and brazing alloy, not a structural grade. Mechanical properties are modest and are rarely the primary selection criterion. Typical values for 4045 in the annealed (O) condition are shown below.<\/p>\n<table>\n<thead>\n<tr>\n<th>\uc18d\uc131<\/th>\n<th>Typical Value (O temper)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\uc778\uc7a5 \uac15\ub3c4(\uad81\uadf9)<\/td>\n<td>\u2248 124 MPa (\u2248 18 ksi)<\/td>\n<\/tr>\n<tr>\n<td>\ud56d\ubcf5\uac15\ub3c4 (0.2%)<\/td>\n<td>\u2248 60\u201380 MPa (approximate)<\/td>\n<\/tr>\n<tr>\n<td>\ud734\uc2dd \uc2dc \uc2e0\uc7a5<\/td>\n<td>\u2248 15 %<\/td>\n<\/tr>\n<tr>\n<td>\uacbd\ub3c4(\ube0c\ub9ac\ub12c)<\/td>\n<td>\u2248 40\u201350 HB (approximate)<\/td>\n<\/tr>\n<tr>\n<td>\ubc00\ub3c4<\/td>\n<td>2.67 g\/cm\u00b3 (0.096 lb\/in\u00b3)<\/td>\n<\/tr>\n<tr>\n<td>\ub179\ub294 \ubc94\uc704<\/td>\n<td>577 \u2013 632 \u00b0C (1071 \u2013 1170 \u00b0F)<\/td>\n<\/tr>\n<tr>\n<td>\ud0c4\uc131 \uacc4\uc218<\/td>\n<td>\u2248 70 GPa (10,150 ksi)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Values shown are typical for annealed 4045. Yield strength and hardness are indicative \u2014 4045 is not typically specified for structural load-bearing use. For applications where mechanical performance is critical, consider 6061, 5052, or other structural alloys.<\/p>\n<h2>Temper Selection Guide for 4045 Aluminum<\/h2>\n<p>4045 is supplied in a limited number of tempers because it is a filler alloy, not a structural grade that benefits from precipitation hardening.<\/p>\n<table>\n<thead>\n<tr>\n<th>\uc131\uc9c8<\/th>\n<th>\ucd5c\uc0c1\uc758 \ub300\uc0c1<\/th>\n<th>\ucc38\uace0<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>4045-O (Annealed)<\/td>\n<td>Brazing sheet, foil, filler wire requiring maximum ductility<\/td>\n<td>Softest condition. Best formability and braze flow. Most common temper for 4045 products.<\/td>\n<\/tr>\n<tr>\n<td>4045-F (As-Fabricated)<\/td>\n<td>Bar, rod, and wire where no final anneal is specified<\/td>\n<td>Properties depend on production method. Used when annealed condition is not required.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Unlike 2xxx, 6xxx, or 7xxx alloys, 4045 does not use T-type tempers (T4, T6, etc.) because it is not strengthened by precipitation hardening in service. Its metallurgical role is to melt and flow during brazing, not to carry structural load.<\/p>\n<h2>Key Characteristics of 4045 Aluminum<\/h2>\n<h3>Excellent Brazing &amp; Filler Performance<\/h3>\n<p>The 9\u201311% silicon content gives 4045 a low and narrow melting range (577\u2013632 \u00b0C). This allows it to melt and flow cleanly into joint clearances during brazing, wetting aluminum substrates without excessive erosion. 4045 is one of the standard filler alloys for aluminum brazing in heat-exchanger manufacturing.<\/p>\n<h3>Low Solidification Shrinkage<\/h3>\n<p>High silicon content reduces solidification shrinkage compared to pure aluminum. This helps minimize shrinkage cracking and porosity in brazed joints, producing sounder assemblies \u2014 particularly important in long brazed seams and complex heat-exchanger cores.<\/p>\n<h3>Good Fluidity &amp; Castability<\/h3>\n<p>The silicon addition improves melt fluidity, allowing 4045 to fill tight joint gaps and complex braze joints. This same property makes it suitable for casting and foundry applications where thin sections or intricate geometry are involved.<\/p>\n<h3>\uc911\uac04 \uc218\uc900\uc758 \ub0b4\uc2dd\uc131<\/h3>\n<p>4045 offers acceptable corrosion resistance in typical brazed-assembly service environments. However, because it is often used as a cladding or filler rather than as the exposed surface, corrosion performance of the finished assembly usually depends on the core alloy (e.g., 3003 or 6951) more than on the 4045 layer itself.<\/p>\n<h3>Moderate Strength \u2014 Not a Structural Alloy<\/h3>\n<p>4045 is a low-to-moderate strength alloy. Its tensile strength in the annealed condition is approximately 124 MPa \u2014 far below structural grades like 6061-T6 (\u2248 310 MPa) or 7075-T6 (\u2248 572 MPa). It should not be specified for load-bearing applications. Its selection is driven by braze\/filler performance, not by mechanical strength.<\/p>\n<h2>Common Applications of 4045 Aluminum<\/h2>\n<p>4045 is selected wherever aluminum brazing, welding filler, or cladding performance is required:<\/p>\n<ul>\n<li><strong>Heat exchangers:<\/strong> Brazed plate-fin and tube-and-fin heat exchangers for HVAC, automotive cooling, and refrigeration \u2014 4045 is used as cladding on 3003\/6951 core to form braze joints during furnace brazing<\/li>\n<li><strong>Automotive thermal management:<\/strong> Radiators, condensers, evaporators, oil coolers, and intercoolers using brazed aluminum assemblies<\/li>\n<li><strong>Brazing filler wire:<\/strong> Hand brazing and furnace brazing of aluminum assemblies where good flow and joint fill are required<\/li>\n<li><strong>Welding filler:<\/strong> Gas welding of aluminum where a silicon-bearing filler is acceptable; 4045 is an alternative to 4043 and 4047 in certain procedures<\/li>\n<li><strong>Clad sheet:<\/strong> Roll-bonded cladding on structural or corrosion-resistant core alloys to provide a braze-ready surface<\/li>\n<li><strong>Casting and foundry:<\/strong> Silicon-bearing aluminum castings where fluidity and low shrinkage are valued<\/li>\n<\/ul>\n<h2>Processing &amp; Surface Finish Notes for 4045<\/h2>\n<p>4045 requires a different processing mindset than structural alloys. Its primary function is to melt and flow during brazing \u2014 handling and fabrication should preserve surface cleanliness and dimensional accuracy.<\/p>\n<ul>\n<li><strong>Slitting and shearing:<\/strong> Brazing sheet is typically slit to width for heat-exchanger fin stock. Burr-free edges and tight width tolerances are important for automated brazing line feeding.<\/li>\n<li><strong>CNC \uac00\uacf5:<\/strong> 4045 bar can be machined, but it is not a structural machining alloy. Use sharp carbide tooling and conservative speeds; silicon content can increase tool wear compared to pure aluminum.<\/li>\n<li><strong>\ub808\uc774\uc800 \uc808\ub2e8:<\/strong> Suitable for thin brazing sheet. Edge quality depends on thickness and assist gas; nitrogen assist is recommended.<\/li>\n<li><strong>\uc131\ud615:<\/strong> O-temper 4045 sheet has good formability and can be stamped, folded, and roll-formed into fin and tube shapes before brazing.<\/li>\n<li><strong>Brazing preparation:<\/strong> Surface cleanliness is critical. Oil, oxide, and contamination will inhibit braze flow. Degreasing and mechanical or chemical oxide removal are recommended before brazing.<\/li>\n<li><strong>\ud45c\uba74 \ubcf4\ud638:<\/strong> PVC film, paper interleaving, and protective packaging are available to preserve surface cleanliness during shipment.<\/li>\n<\/ul>\n<h2>\ud488\uc9c8 \ubb38\uc11c \ubc0f \uac80\uc0ac<\/h2>\n<p>Quality control at Linsy runs from raw material selection through finished product inspection. Every order is supplied with an MTC (Material Test Certificate) issued under Linsy Aluminum after production, including chemical composition results for the actual lot.<\/p>\n<p>\uc81c3\uc790 \uac80\uc99d\uc774 \ud544\uc694\ud55c \uace0\uac1d\uc758 \uacbd\uc6b0, \uc694\uccad \uc2dc \ucd94\uac00 \uc2dc\ud5d8 \ube44\uc6a9\uc744 \uc9c0\ubd88\ud558\uace0 SGS \uc2dc\ud5d8 \ubcf4\uace0\uc11c\ub97c \ubc1c\uae09\ubc1b\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc81c\uacf5 \uac00\ub2a5\ud55c SGS \ubcf4\uace0\uc11c\uc5d0\ub294 \ub2e4\uc74c\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4:<\/p>\n<ul>\n<li>SGS \ud654\ud559 \uc131\ubd84 \ubd84\uc11d \ubcf4\uace0\uc11c<\/li>\n<li>SGS \uae30\uacc4\uc801 \ud2b9\uc131 \ubcf4\uace0\uc11c<\/li>\n<li>SGS \uce58\uc218 \uac80\uc0ac \ubcf4\uace0\uc11c<\/li>\n<li>SGS RoHS \ubc0f REACH \ubcf4\uace0\uc11c<\/li>\n<\/ul>\n<h2>Why Choose Linsy for 4045 Aluminum<\/h2>\n<p>Linsy Aluminum is a Shenzhen-based aluminum factory with more than 20 years of industry experience, supplying 4045 and other 1000\u20138000 series alloys to customers across automotive thermal management, HVAC, general engineering, manufacturing, and power electronics.<\/p>\n<p>For your 4045 sourcing, this means:<\/p>\n<ul>\n<li><strong>Specialty filler alloy support<\/strong> \u2014 brazing sheet, filler wire, foil, and bar in 4045 and related 4xxx grades<\/li>\n<li><strong>\uc720\uc5f0\ud55c \uc8fc\ubb38 \uc9c0\uc6d0<\/strong> \u2014 both standard and custom specifications, including harder-to-find filler grades<\/li>\n<li><strong>\uc18c\ub7c9 \uc8fc\ubb38 \uac00\ub2a5\ud55c \ub9de\ucda4\ud615 \uc0dd\uc0b0<\/strong> \uc7ac\uace0\uac00 \uc5c6\ub294 \uc0ac\uc774\uc988\uc758 \uacbd\uc6b0, \uc77c\ubc18\uc801\uc778 \ub9de\ucda4 \uc81c\uc791 \uc18c\uc694 \uae30\uac04\uc740 10~60\uc77c\uc785\ub2c8\ub2e4.<\/li>\n<li><strong>In-house processing<\/strong> \u2014 slitting, shearing, laser cutting, CNC machining, and surface finishing<\/li>\n<li><strong>\ubaa8\ub4e0 \uc8fc\ubb38 \uc2dc MTC \uc81c\uacf5<\/strong>, \ub610\ud55c \uc694\uccad \uc2dc \uc120\ud0dd\uc801\uc73c\ub85c SGS \uac80\uc0ac\ub3c4 \uc2e4\uc2dc\ud569\ub2c8\ub2e4<\/li>\n<li><strong>ISO 9001, ISO 14001 \ubc0f ISO 45001\uc5d0 \ubd80\ud569\ud558\ub294 \uacbd\uc601 \uc2dc\uc2a4\ud15c<\/strong> \ud45c\uc900<\/li>\n<\/ul>\n<h2>\uad00\ub828 \uc790\ub8cc<\/h2>\n<p>4045 is a specialty brazing and filler alloy. Dedicated 4045 application guides will be linked here as they are published. In the meantime, these related resources may help with alloy selection:<\/p>\n<ul>\n<li><a href=\"https:\/\/premiumalu.com\/ko\/3003-%eb%8c%80-6061-%ec%8b%ac%ec%b8%b5-%ec%a2%85%ed%95%a9-%eb%b9%84%ea%b5%90\/\">3003 \ub300 6061 \u2014 \uc2ec\uce35\uc801\uc774\uace0 \ud3ec\uad04\uc801\uc778 \ube44\uad50<\/a> (3003 is a common core alloy for 4045-clad brazing sheet)<\/li>\n<\/ul>\n<h2>4045 Aluminum FAQ<\/h2>\n<h3>What is 4045 aluminum used for?<\/h3>\n<p>4045 is primarily used as a brazing filler and cladding alloy. Its main applications are brazed aluminum heat exchangers (radiators, condensers, evaporators), filler wire for gas welding and brazing, and clad sheet for furnace-brazed assemblies. It is not a structural load-bearing alloy.<\/p>\n<h3>What is the difference between 4045 and 4047 aluminum?<\/h3>\n<p>Both are 4xxx-series aluminum-silicon filler alloys. 4045 contains 9\u201311% silicon; 4047 contains 11\u201313% silicon. The higher silicon in 4047 gives a slightly lower and narrower melting range, which can improve braze flow in tight joints. 4045 is often used where a slightly broader melting interval is acceptable.<\/p>\n<h3>What is the difference between 4045 and 4043 aluminum?<\/h3>\n<p>4043 contains 4.5\u20136.0% silicon, while 4045 contains 9\u201311% silicon. 4043 is a general-purpose welding filler wire with moderate silicon content. 4045 has higher silicon, giving better fluidity and lower melting range \u2014 making it more suitable for brazing applications. 4043 is more commonly used for general gas welding and GTAW filler applications.<\/p>\n<h3>Can 4045 be heat treated?<\/h3>\n<p>4045 is classified as a heat-treatable alloy in some reference standards, but it is not strengthened by precipitation hardening in practical service. It does not use T4, T6, or other T-type tempers. Its metallurgical role is to melt and flow during brazing, not to provide strength through heat treatment.<\/p>\n<h3>Is 4045 a structural alloy?<\/h3>\n<p>No. 4045 has low-to-moderate strength (tensile strength \u2248 124 MPa in the annealed condition). It is a filler and brazing alloy, not a structural grade. For load-bearing applications, consider 6061, 6063, 5052, or 7075 depending on your strength, weldability, and corrosion requirements.<\/p>\n<h3>What is 4045 brazing sheet?<\/h3>\n<p>4045 brazing sheet is aluminum sheet (often thin gauge, 0.1\u20134.0 mm) used in brazed heat-exchanger manufacturing. It is frequently supplied as a clad composite \u2014 4045 clad on one or both sides of a 3003, 3005, or 6951 core alloy. During furnace brazing, the 4045 cladding melts and forms the braze joint while the higher-melting core retains its shape.<\/p>\n<h3>What forms does Linsy supply for 4045?<\/h3>\n<p>Linsy supplies 4045 as brazing sheet and coil, filler wire, foil, and bar. Tube and custom profiles can be quoted on request. Because 4045 is a specialty filler alloy, availability of some forms is more limited than for structural grades like 6061.<\/p>\n<h3>What is the melting range of 4045 aluminum?<\/h3>\n<p>The melting range of 4045 is approximately 577\u2013632 \u00b0C (1071\u20131170 \u00b0F). The silicon addition lowers the melting point below that of pure aluminum (660 \u00b0C), which is why 4045 melts and flows before the core alloy in brazed assemblies.<\/p>\n<h2>\uc8fc\ubb38 \uad00\ub828 \uc77c\ubc18\uc801\uc778 \uc790\uc8fc \ubb3b\ub294 \uc9c8\ubb38<\/h2>\n<h3>What is the typical lead time for custom 4045 orders?<\/h3>\n<p>For non-stock sizes or custom specifications, typical lead time is 10\u201360 days depending on alloy, dimensions, processing requirements, and order complexity. In-stock standard specifications can ship faster \u2014 contact our team for a specific quote.<\/p>\n<h3>What is the minimum order quantity (MOQ)?<\/h3>\n<p>Linsy supports low-MOQ custom production for non-stock 4045 items. MOQ varies by form, size, and processing scope; please share your requirements and we will confirm feasibility.<\/p>\n<h3>What documents accompany each shipment?<\/h3>\n<p>Every order ships with an MTC (Material Test Certificate) issued by Linsy Aluminum after production. Optional SGS third-party test reports are available on request at an additional testing cost.<\/p>\n<h3>Do you offer sample pieces before bulk order?<\/h3>\n<p>Yes, samples can be arranged for most standard and custom specifications. Sample cost and lead time depend on size and processing requirements.<\/p>\n<h3>\uc5b4\ub290 \uc9c0\uc5ed\uc73c\ub85c \ubc30\uc1a1\ud574 \uc8fc\uc2dc\ub098\uc694?<\/h3>\n<p>Linsy\ub294 \uc804 \uc138\uacc4\ub85c \ubc30\uc1a1\ud558\uba70, \uc720\ub7fd, \ub0a8\uc544\ud504\ub9ac\uce74, \ube0c\ub77c\uc9c8, \uc2f1\uac00\ud3ec\ub974, \ud130\ud0a4, \uc77c\ubcf8, \ud55c\uad6d \ubc0f \ub0a8\uc544\uc2dc\uc544 \uc9c0\uc5ed\uc5d0 \uc548\uc815\uc801\uc778 \uacf5\uae09\ub9dd\uc744 \uad6c\ucd95\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4.<\/p>","protected":false},"excerpt":{"rendered":"<p>4045 aluminum alloy (UNS A94045, EN AW-AlSi10) is a 4000-series wrought aluminum alloy alloyed primarily with silicon (9\u201311%). Its high silicon content gives excellent fluidity and low solidification shrinkage, making it a preferred filler and cladding alloy for brazing and welding applications. Linsy supplies 4045 aluminum in brazing sheet, coil, filler wire, foil, and bar in tempers O and F, with custom sizes, surface finishing, and MTC reports available.<\/p>\n<p>\n<strong>\uc774\uc6a9 \uac00\ub2a5\ud55c \uc591\uc2dd:<\/strong> brazing sheet \/ coil \/ filler wire \/ foil \/ bar<br \/>\n<strong>\ud754\ud788 \ub098\ud0c0\ub098\ub294 \uae30\uc9c8:<\/strong> O \/ F<br \/>\n<strong>\ucc98\ub9ac \uc9c0\uc6d0:<\/strong> CNC machining \/ laser cutting \/ slitting \/ surface finishing<br \/>\n<strong>\ud488\uc9c8 \uad00\ub828 \ubb38\uc11c:<\/strong> \ubaa8\ub4e0 \uc8fc\ubb38 \uc2dc MTC \ubcf4\uace0\uc11c \uc81c\uacf5, \uc694\uccad \uc2dc SGS \uac80\uc0ac \uc2e4\uc2dc<\/p>","protected":false},"featured_media":8375,"template":"","meta":{"_seopress_titles_title":"4045 Aluminum Alloy \u2014 Brazing Sheet, Filler Wire & Bar Supplier | Linsy Aluminum","_seopress_titles_desc":"Source 4045 aluminum alloy (AlSi10) brazing sheet, filler wire, foil & bar in O temper. 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