{"id":8805,"date":"2025-06-15T02:00:17","date_gmt":"2025-06-15T02:00:17","guid":{"rendered":"https:\/\/premiumalu.com\/7021-aluminum-the-ultimate-guide-to-its-uses\/"},"modified":"2026-08-19T10:29:13","modified_gmt":"2026-08-19T10:29:13","slug":"aluminium-7021-kompletny-przewodnik-po-jego-zastosowaniach","status":"publish","type":"post","link":"https:\/\/premiumalu.com\/pl\/aluminium-7021-kompletny-przewodnik-po-jego-zastosowaniach\/","title":{"rendered":"Odkryj aluminium 7021: Kompletny przewodnik"},"content":{"rendered":"

What Is 7021 Aluminum?<\/h2>\n\n\n\n

7021 is a 7000-series aluminum alloy that uses zinc (5.0\u20136.0%) as its primary strengthening element, backed by magnesium (1.2\u20131.8%) and copper (1.2\u20132.0%). It is precipitation-hardened \u2014 strength comes from controlled heat treatment, not cold work. The alloy belongs to the Al-Zn-Mg-Cu family, the same group as 7075, but its composition is tuned for a different trade-off: slightly lower peak strength in exchange for significantly better weldability and reasonable toughness in the heat-affected zone.<\/p>\n\n\n\n

That weldability is what separates 7021 from the rest of the 7000 series. Most 7xxx alloys \u2014 7075 in particular \u2014 are essentially unweldable by fusion processes. 7021 was developed specifically for applications where high strength must coexist with the ability to join components by welding. The cost is corrosion resistance: like all zinc-rich aluminum alloys, 7021 requires a protective coating or anodizing for any exterior or humid-environment service. If the part will be welded and needs 7000-series strength, 7021 is one of the few alloys that makes that combination practical.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Sk\u0142ad chemiczny i w\u0142a\u015bciwo\u015bci mechaniczne<\/h2>\n\n\n\n

Sk\u0142ad chemiczny<\/h3>\n\n\n\n

The alloy’s strength profile is driven primarily by zinc and magnesium, which form strengthening precipitates during artificial aging. Copper adds a secondary hardening effect and improves resistance to stress corrosion cracking. Zirconium (0.08\u20130.18%) plays a structural role: it raises the recrystallization temperature, which helps the alloy retain fine grain structure through heat treatment and welding cycles. Chromium (0.10\u20130.25%) provides additional grain-boundary pinning.<\/p>\n\n\n\n

Element<\/strong><\/td>Zakres sk\u0142adu (wagowo %)<\/strong><\/td>Rola<\/strong><\/td><\/tr>
Aluminium (Al)<\/td>Balance (~90.7\u201393.7)<\/td>Metal nieszlachetny<\/td><\/tr>
Cynk (Zn)<\/td>5.0\u20136.0<\/td>Primary strengthening element<\/td><\/tr>
Magnez (Mg)<\/td>1.2\u20131.8<\/td>Precipitate former; strength + corrosion<\/td><\/tr>
Mied\u017a (Cu)<\/td>1.2\u20132.0<\/td>Secondary hardening; stress-corrosion resistance<\/td><\/tr>
Mangan (Mn)<\/td>0.10\u20130.40<\/td>Grain structure control<\/td><\/tr>
Chrom (Cr)<\/td>0.10\u20130.25<\/td>Grain-boundary stabilization<\/td><\/tr>
Cyrkon (Zr)<\/td>0.08\u20130.18<\/td>Recrystallization temperature increase<\/td><\/tr>
Krzem (Si)<\/td>\u22640.40<\/td>Impurity limit<\/td><\/tr>
\u017belazo (Fe)<\/td>\u22640.50<\/td>Impurity limit<\/td><\/tr>
Tytan (Ti)<\/td>\u22640.10<\/td>Grain refiner<\/td><\/tr>
Inni (ka\u017cdy)<\/td>\u22640.05<\/td>Trace elements<\/td><\/tr>
Inne (\u0142\u0105cznie)<\/td>\u22640.15<\/td>Total trace<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Mechanical Properties (T6 Temper)<\/h3>\n\n\n\n
\"\"<\/figure>\n\n\n\n

Unless otherwise noted, the values below are for 7021 in the T6 temper \u2014 solution heat-treated and artificially aged to peak strength. This is the baseline condition for structural applications.<\/p>\n\n\n\n

Nieruchomo\u015b\u0107<\/strong><\/td>Warto\u015b\u0107<\/strong><\/td>Uwagi<\/strong><\/td><\/tr>
G\u0119sto\u015b\u0107<\/td>2,78 g\/cm\u00b3<\/td>Typical for 7xxx-series<\/td><\/tr>
Ostateczna wytrzyma\u0142o\u015b\u0107 na rozci\u0105ganie<\/td>470 MPa (68 ksi)<\/td>Longitudinal, room temperature<\/td><\/tr>
Tensile Yield Strength (0.2% offset)<\/td>420 MPa (61 ksi)<\/td>Design-governing value for structural parts<\/td><\/tr>
Wyd\u0142u\u017cenie przy zerwaniu<\/td>~10%<\/td>In 50 mm gauge<\/td><\/tr>
Modu\u0142 spr\u0119\u017cysto\u015bci<\/td>71 GPa (10,300 ksi)<\/td>Approximately one-third of steel<\/td><\/tr>
Fatigue Strength (5\u00d710\u2078 cycles)<\/td>~150 MPa (22 ksi)<\/td>Smooth specimen, R = \u22121<\/td><\/tr>
Wytrzyma\u0142o\u015b\u0107 na \u015bcinanie<\/td>270 MPa (39 ksi)<\/td>Relevant for riveted and bolted joint design<\/td><\/tr>
Twardo\u015b\u0107<\/td>~120 HB<\/td>500 kg load, 10 mm ball<\/td><\/tr>
Przewodno\u015b\u0107 cieplna<\/td>150 W\/m\u00b7K<\/td>Moderate; adequate for most structural applications<\/td><\/tr>
Przewodno\u015b\u0107 elektryczna<\/td>38% IACS<\/td>Typical for zinc-rich alloys<\/td><\/tr>
Zakres topnienia<\/td>510\u2013630\u00b0C<\/td>Solidus to liquidus<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

The 420 MPa yield strength puts 7021-T6 well above 6061-T6 (276 MPa) and solidly in the high-strength aluminum category. The 10% elongation is lower than the elongation typical of 5xxx or 6xxx alloys, which matters if the part requires post-fabrication forming \u2014 7021 in the T6 temper is not a forming alloy. The trade-off is strength for ductility, and for structural applications where static load capacity governs the design, the yield strength is the design-governing value.<\/p>\n\n\n\n

Where 7021 Is Used<\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

7021’s defining advantage is the strength + weldability combination. Most applications fall into categories where 7075 would be the obvious strength choice but the part must be joined by welding.<\/p>\n\n\n\n

1. Welded Structural Assemblies<\/h3>\n\n\n\n

Welded transport structures \u2014 truck frames, trailer chassis, railcar components \u2014 use 7021 where high strength and fusion welding are both required. The alloy’s hot-cracking resistance is significantly better than 7075’s, making it viable for MIG and TIG with qualified 5xxx-series filler (5356 or 5183). The welded joint remains the design-limiting location.<\/p>\n\n\n\n

2. Aerospace Welded Components<\/h3>\n\n\n\n

In aerospace, 7021 appears in welded subassemblies \u2014 cargo container frames, stiffener assemblies, secondary structural brackets \u2014 where 7075’s non-weldability would force a riveted or bolted design that adds weight. It is not a fuselage-skin or wing-spar alloy; those remain 2024 and 7075 territory.<\/p>\n\n\n\n

3. Mold Making and Tooling<\/h3>\n\n\n\n

7021-T6 is used in plastic injection molds and blow-mold tooling where high compressive strength, thermal conductivity, and machinability matter. Compared to mold steels, aluminum tooling cuts cycle times through faster heat transfer, and 7021 provides better strength than 6061 or 5083 in the same role.<\/p>\n\n\n\n

4. Cranes, Lifting Equipment, and Heavy Fabrication<\/h3>\n\n\n\n

Overhead crane beams, lifting arms, and large structural fabrications benefit from 7021’s weldability where mechanical fastening alone is impractical. The material handles stress concentrations around welded attachment points better than 6xxx alternatives, at lower cost than titanium or steel for equivalent strength.<\/p>\n\n\n\n

7021 Temper Options<\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

7021 is most commonly supplied in three tempers, each addressing a different processing requirement.<\/p>\n\n\n\n

Temperament<\/strong><\/td>Treatment<\/strong><\/td>UTS (MPa)<\/strong><\/td>YS (MPa)<\/strong><\/td>Wyd\u0142u\u017cenie<\/strong><\/td>Najlepsze dla<\/strong><\/td>Avoid When<\/strong><\/td><\/tr>
T6<\/td>Solution heat-treated + artificially aged<\/td>470<\/td>420<\/td>~10%<\/td>General structural parts: as-supplied strength with no post-weld processing<\/td>Tight forming or bending required after heat treatment<\/td><\/tr>
T651<\/td>T6 + stress-relief stretch (1\u20133%)<\/td>470<\/td>420<\/td>~10%<\/td>Machined components where residual stress must be relieved before material removal<\/td>\u2014 (functionally identical to T6 for most non-machining applications)<\/td><\/tr>
T62<\/td>Solution heat-treated + artificially aged from user-applied treatment<\/td>~470<\/td>~420<\/td>~10%<\/td>Parts that were solution-treated and aged as a manufactured assembly rather than as raw stock<\/td>Ordering raw material \u2014 specify T6 or T651 instead<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

T6: Standard Temper<\/h3>\n\n\n\n

T6 is the standard temper for most 7021 applications. The material arrives fully aged and ready for fabrication \u2014 welding, machining, and assembly. Yield strength of 420 MPa is the design value.<\/p>\n\n\n\n

T651: Stress-Relieved for Machining<\/h3>\n\n\n\n

If the part will be heavily machined \u2014 deep pockets, asymmetric material removal, tight flatness tolerances \u2014 T651 is the better choice. The stress-relief stretch redistributes residual quenching stresses through the cross-section, reducing warpage during machining. The mechanical properties are identical to T6; T651 provides dimensional stability, not additional strength.<\/p>\n\n\n\n

A Note on T62<\/h3>\n\n\n\n

T62 describes a condition where the manufacturer or fabricator performs the solution treatment and aging on a formed or fabricated assembly, rather than the mill delivering it in the fully aged state. T62 is not a separate grade of 7021 \u2014 it describes the processing route. When ordering raw material, specify T6 (or T651 for machined parts). T62 is relevant if solution-treating an assembly after welding or forming to restore full strength.<\/p>\n\n\n\n

7021 vs 7075 vs 6061<\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

These three alloys cover the most common high-strength aluminum decisions. The table below maps the key selection criteria.<\/p>\n\n\n\n

Nieruchomo\u015b\u0107<\/strong><\/td>7021-T6<\/a><\/strong><\/td>7075-T6<\/a><\/strong><\/td>6061-T6<\/a><\/strong><\/td><\/tr>
Wytrzyma\u0142o\u015b\u0107 na rozci\u0105ganie (UTS)<\/td>470 MPa<\/td>572 MPa<\/td>310 MPa<\/td><\/tr>
Wytrzyma\u0142o\u015b\u0107 na rozci\u0105ganie<\/td>420 MPa<\/td>503 MPa<\/td>276 MPa<\/td><\/tr>
Wyd\u0142u\u017cenie<\/td>~10%<\/td>~11%<\/td>12\u201317%<\/td><\/tr>
G\u0119sto\u015b\u0107<\/td>2,78 g\/cm\u00b3<\/td>2,81 g\/cm\u00b3<\/td>2,70 g\/cm\u00b3<\/td><\/tr>
Weldability (fusion)<\/td>Fair \u2014 requires qualified MIG\/TIG processes<\/td>Poor \u2014 not recommended for fusion welding<\/td>Excellent \u2014 all common processes<\/td><\/tr>
Odporno\u015b\u0107 na korozj\u0119<\/td>Limited \u2014 requires coating or anodizing<\/td>Limited \u2014 requires coating or cladding<\/td>Good \u2014 useable in many environments without protection<\/td><\/tr>
Wytrzyma\u0142o\u015b\u0107 zm\u0119czeniowa<\/td>~150 MPa<\/td>~160 MPa<\/td>~97 MPa<\/td><\/tr>
Obrabialno\u015b\u0107<\/td>Bardzo dobra<\/td>Dobry<\/td>Dobry<\/td><\/tr>
Typowe zastosowania<\/td>Welded structures, molds, welded aerospace subassemblies<\/td>High-stress machined components, airframe structure<\/td>General fabrication, marine, architectural<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Where 7021 Is the Right Choice<\/h3>\n\n\n\n

The part must be welded and needs 7000-series strength. 7075 is essentially unweldable \u2014 hot cracking in the fusion zone and severe HAZ strength loss make it impractical for welded assemblies. 7021 was developed for this constraint. If welding is the joining method and 6061’s 276 MPa yield strength is not enough, 7021 is the logical step up.<\/p>\n\n\n\n

Mold tooling where strength matters more than 6061 provides. 7021’s 420 MPa yield strength gives plastic injection and blow-mold tooling a higher pressure rating than 6061 or 5083 alternatives at comparable cost.<\/p>\n\n\n\n

Where 7075 or 6061 Is Better<\/h3>\n\n\n\n

Maximum strength with no welding required. 7075-T6 delivers roughly 20% more yield strength than 7021. For machined structural components, aircraft fittings, and high-stress parts that will be bolted or riveted, 7075 is the stronger choice. See the 7075 aluminum guide for full property data.<\/p>\n\n\n\n

General fabrication with good corrosion resistance. 6061-T6 is weldable, formable, corrosion-resistant, and widely available. For structural fabrication where 276 MPa yield is adequate and welding simplicity matters, 6061 is the standard. The 6061 aluminum guide covers the full profile.<\/p>\n\n\n\n

Working with 7021 Aluminum<\/h2>\n\n\n\n

Obr\u00f3bka skrawaniem<\/h3>\n\n\n\n

7021 machines very well with carbide tooling at high spindle speeds. Chip formation is clean and chip control is manageable \u2014 better than 6061 and roughly comparable to 7075. If the part geometry involves deep pockets, asymmetric cuts, or tight flatness tolerances, T651 should be specified rather than T6 to avoid warpage from residual stress release. For sheet-level operations \u2014 trimming, drilling, light milling \u2014 T6 is stable.<\/p>\n\n\n\n

Spawanie<\/h3>\n\n\n\n

Fusion welding of 7021 is possible but requires more process control than 5xxx or 6xxx alloys. The alloy is resistant to hot cracking compared to 7075, but it is not immune. Key practices:<\/p>\n\n\n\n

    \n
  •  <\/strong>Filler metal.<\/strong> 5xxx-series fillers \u2014 5356 or 5183 \u2014 are the standard choice. They provide a weld pool composition that resists solidification cracking while maintaining acceptable joint strength.<\/li>\n\n\n\n
  •  <\/strong>Heat input control.<\/strong> Interpass temperature should remain below 150\u00b0C (300\u00b0F). Excessive heat input increases the width of the heat-affected zone and the resulting strength loss.<\/li>\n\n\n\n
  •  <\/strong>Post-weld heat treatment.<\/strong> Solution treatment and re-aging can recover a meaningful portion of the HAZ strength loss, but this adds a full thermal cycle to the fabrication sequence and may not be practical for large assemblies. Welds should be designed as the strength-limiting feature of the structure, with sections sized accordingly.<\/li>\n\n\n\n
  •  <\/strong>Friction stir welding.<\/strong> Where the joint geometry permits, friction stir welding is the preferred process. It stays below the solution-treatment temperature, preserving more base-metal strength in the joint. However, it requires specialized equipment and is limited to butt and lap joints in flat or cylindrical geometries.<\/li>\n<\/ul>\n\n\n\n

    Corrosion Protection<\/h3>\n\n\n\n

    7021’s corrosion resistance is limited \u2014 a property it shares with nearly all 7xxx alloys. Zinc-rich aluminum is susceptible to both general corrosion and stress corrosion cracking in humid or chloride-containing environments. Three protection strategies cover most applications:<\/p>\n\n\n\n

      \n
    •  <\/strong>Anodizing.<\/strong> Sulfuric acid anodizing (Type II) builds a controlled oxide barrier. However, the high zinc content can produce a less uniform anodic layer than on 6xxx alloys, and anodizing quality varies with bath conditions and alloy batch. Hard anodizing (Type III) is possible but may reduce fatigue life.<\/li>\n\n\n\n
    •  <\/strong>Paint systems.<\/strong> Epoxy primer followed by polyurethane topcoat is the standard industrial protection system. For interior or sheltered applications, a single-coat system may suffice. Surface preparation \u2014 chemical conversion coating (Alodine) or thin anodize \u2014 is essential for paint adhesion.<\/li>\n\n\n\n
    •  <\/strong>Drainage design.<\/strong> Water traps, crevices, and horizontal surfaces where moisture can pool should be avoided. Simple geometry choices reduce corrosion risk more than any coating.<\/li>\n<\/ul>\n\n\n\n

      Pros and Limitations at a Glance<\/h2>\n\n\n\n
      Czynnik<\/strong><\/td>Przewaga<\/strong><\/td>Ograniczenie<\/strong><\/td><\/tr>
      Si\u0142a<\/td>470 MPa UTS, 420 MPa YS \u2014 in the high-strength aluminum category<\/td>~15\u201318% below 7075-T6 for applications where yield governs<\/td><\/tr>
      Spawalno\u015b\u0107<\/td>One of the most weldable 7xxx alloys; viable with qualified MIG\/TIG<\/td>Requires process control; HAZ strength loss is permanent without post-weld heat treatment<\/td><\/tr>
      Obrabialno\u015b\u0107<\/td>Very good chip formation and surface finish<\/td>T651 should be specified for heavy machining to avoid warpage<\/td><\/tr>
      Odporno\u015b\u0107 na korozj\u0119<\/td>Adequate with anodizing or paint<\/td>Bare alloy not suitable for unprotected outdoor or marine service<\/td><\/tr>
      Fatigue<\/td>150 MPa \u2014 solid for structural cyclic loading<\/td>Below 7075 (160 MPa) and 2024 (140 MPa, but with better notched fatigue behavior)<\/td><\/tr>
      Dost\u0119pno\u015b\u0107<\/td>Standard mill product in plate, bar, and extrusion forms<\/td>Less widely stocked than 6061 or 7075; confirm availability before designing around it<\/td><\/tr>
      Formowalno\u015b\u0107<\/td>Adequate for extrusion profiles<\/td>Not suited for cold forming or bending in the T6 condition<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      Wnioski<\/h2>\n\n\n\n

      7021 occupies a narrow but well-defined position in the 7000 series: it trades roughly 15\u201318% of 7075’s peak strength for the ability to be fusion-welded, but limited corrosion resistance requires protective treatment and welding demands qualified processes with the right filler metal and heat control. 7021 is also less widely stocked than 6061 or 7075, making availability confirmation and processing support critical before design commitment. <\/p>\n\n\n\n

      Linsy Aluminum supplies 7021 in plate, bar, tube, wire, coil, profile, and block forms in T6 and T651 tempers with MTC documentation on every order, SGS test reports on request, and in-house CNC machining, MIG\/TIG welding, laser cutting, and surface finishing; low-MOQ custom production covers non-stock dimensions with a typical lead time of 10\u201360 days. Send the 7021 grade, form, temper, and required dimensions for a specification review and stock confirmation.<\/p>\n\n\n\n

      Cz\u0119sto zadawane pytania<\/h2>\n\n\n\n

      What makes 7021 different from 7075?<\/h3>\n\n\n\n

      The two alloys share the same Al-Zn-Mg-Cu family but target different priorities. 7075 is designed for maximum strength (572 MPa UTS, 503 MPa YS in T6) at the cost of being essentially unweldable by fusion processes. 7021 trades approximately 15\u201318% of that yield strength for practical weldability with qualified MIG\/TIG processes. 7021 is the appropriate choice when the part must be welded; 7075 is preferred for maximum strength in bolted, riveted, or machined components.<\/p>\n\n\n\n

      Can 7021 be welded with standard MIG equipment?<\/h3>\n\n\n\n

      Yes, but with process controls that go beyond typical 6xxx or 5xxx practice. 5xxx-series fillers (5356 or 5183) are the standard choice; interpass temperature should remain below 150\u00b0C, and the joint should be designed expecting some HAZ strength loss. For critical structural welds, friction stir welding preserves more joint strength and should be evaluated if the part geometry permits it.<\/p>\n\n\n\n

      What is the difference between 7021-T6 and 7021-T651?<\/h3>\n\n\n\n

      The mechanical properties are identical \u2014 470 MPa UTS, 420 MPa YS, ~10% elongation. The difference is a stress-relief stretch step (1\u20133% elongation after quenching) applied in T651. This redistributes residual quenching stresses through the cross-section and reduces warpage during machining. For parts that will be heavily machined \u2014 deep pockets, asymmetric cuts, tight flatness specs \u2014 T651 is the safer choice. For general fabrication and welding, T6 is standard.<\/p>\n\n\n\n

      How does 7021 compare to 6061 for structural fabrication?<\/h3>\n\n\n\n

      7021 delivers roughly 50% higher yield strength than 6061-T6 (420 MPa vs 276 MPa). The trade-off is worse corrosion resistance, more demanding welding requirements, lower elongation, and generally higher material cost. If the application can meet its strength target with 6061, the easier fabrication and better corrosion resistance make it the simpler choice. 7021 is the appropriate choice when the 276 MPa yield of 6061 leaves too little margin and welding is still required \u2014 if welding is not required, 7075 may be the better strength upgrade.<\/p>\n\n\n\n

      Does 7021 require corrosion protection in service?<\/h3>\n\n\n\n

      Yes \u2014 for any application beyond dry indoor environments. Bare 7021 will corrode in humid conditions, and it is susceptible to stress corrosion cracking under sustained tensile stress. Sulfuric acid anodizing or a full paint system (conversion coating + epoxy primer + polyurethane topcoat) is the minimum for exterior or industrial environments. For marine or chemical exposure, a different alloy family \u2014 5xxx or 6xxx \u2014 should be considered instead.<\/p>","protected":false},"excerpt":{"rendered":"

      What Is 7021 Aluminum? 7021 is a 7000-series aluminum alloy that uses zinc (5.0\u20136.0%) as its primary strengthening element, backed by magnesium (1.2\u20131.8%) and copper (1.2\u20132.0%). It is precipitation-hardened \u2014 strength comes from controlled heat treatment, not cold work. The alloy belongs to the Al-Zn-Mg-Cu family, the same group as 7075, but its composition is […]<\/p>\n","protected":false},"author":1,"featured_media":8794,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"7021 Aluminum: The Ultimate Guide to Properties and Uses","_seopress_titles_desc":"A practical guide to 7021 aluminum: chemical composition, mechanical properties, T6\/T62\/T651 tempers, comparison with 7075 and 6061, and sourcing tips for aerospace and structural use.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","footnotes":""},"categories":[179],"tags":[],"class_list":["post-8805","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-7000-series-aluminum"],"_links":{"self":[{"href":"https:\/\/premiumalu.com\/pl\/wp-json\/wp\/v2\/posts\/8805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/premiumalu.com\/pl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/premiumalu.com\/pl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/pl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/pl\/wp-json\/wp\/v2\/comments?post=8805"}],"version-history":[{"count":3,"href":"https:\/\/premiumalu.com\/pl\/wp-json\/wp\/v2\/posts\/8805\/revisions"}],"predecessor-version":[{"id":10316,"href":"https:\/\/premiumalu.com\/pl\/wp-json\/wp\/v2\/posts\/8805\/revisions\/10316"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/premiumalu.com\/pl\/wp-json\/wp\/v2\/media\/8794"}],"wp:attachment":[{"href":"https:\/\/premiumalu.com\/pl\/wp-json\/wp\/v2\/media?parent=8805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/premiumalu.com\/pl\/wp-json\/wp\/v2\/categories?post=8805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/premiumalu.com\/pl\/wp-json\/wp\/v2\/tags?post=8805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}