{"id":1175,"date":"2026-10-14T10:35:30","date_gmt":"2026-10-14T10:35:30","guid":{"rendered":"https:\/\/daix488.sg-host.com\/?post_type=product&p=1175"},"modified":"2026-10-15T08:53:22","modified_gmt":"2026-10-15T08:53:22","slug":"astm-b863-grade-7-titanium-wire","status":"publish","type":"product","link":"https:\/\/www.htn-ti.com\/es\/product\/astm-b863-grade-7-titanium-wire\/","title":{"rendered":"ASTM B863 Grade 7 Titanium Wire"},"content":{"rendered":"\t\t
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Product Overview<\/h2>\t\t\t\t<\/div>\n\t\t
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ASTM B863 Grade 7 titanium wire is palladium-bearing commercially pure titanium-base wire with UNS designation R52400. Its base chemistry and room-temperature mechanical level are similar to Grade 2, with 0.12-0.25% palladium added to stabilize passivity in reducing media and reduce susceptibility to crevice corrosion in certain chloride environments. The room-temperature structure is predominantly alpha titanium; palladium is not added primarily for strength.<\/p>

The principal value of Grade 7 is improved corrosion resistance in specific environments, not universally higher strength than Grade 2. It is used for corrosion-resistant wire components in chemical, marine, brine, heat-exchanger and electrochemical equipment. Selection must still consider acid concentration, temperature, chloride content, crevices, flow, dissolved oxygen, galvanic contact and hydrogen-charging conditions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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Specification<\/strong><\/td>Details<\/strong><\/td><\/tr>
Industrial Standard<\/strong><\/td>ASTM B863<\/td><\/tr>
Grades<\/strong><\/td>Gr7<\/td><\/tr>
Diameter Range<\/strong><\/td>\u00d80.03\u2013\u00d87.0 mm<\/td><\/tr>
Typical Diameters<\/strong><\/td>\u00d80.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8, 1.0, 1.2, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 7.0 mm<\/td><\/tr>
Supply Form<\/strong><\/td>Coil \/ Spool or straightened and cut wire<\/td><\/tr><\/tbody><\/table><\/div>

Grade-equivalence note:<\/strong> Grade 7 is sometimes informally called TA9 in the Chinese market. ASTM Grade 7 and Chinese GB\/T grades must be certified to their own specifications and should not be declared fully equivalent without a clause\u2011by\u2011clause comparison.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Main Characteristics<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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  • Improved resistance in reducing media:<\/strong> Palladium supports cathodic reactions and helps the surface maintain or recover passivity, giving Grade 7 better performance than Grade 2 in certain reducing acids and low-pH chloride environments.<\/li>
  • Improved crevice-corrosion resistance:<\/strong> In some hot chloride, brine, deposit and gasket-crevice conditions, Grade 7 has more favorable critical limits than unalloyed CP titanium, but it is not immune at every temperature or concentration.<\/li>
  • Grade 2-type strength and formability:<\/strong> Grade 7 generally retains useful ductility for coiling, weaving and bending. Mechanical behavior is governed mainly by oxygen, iron, grain size, cold work and final annealing.<\/li>
  • Good weldability:<\/strong> Qualified fusion or resistance welding may be used with full inert-gas shielding of hot metal. Filler-wire supply requires separate compliance with AWS A5.16 ERTi-7 or the customer consumable specification.<\/li>
  • Low density and useful low-temperature behavior:<\/strong> Density is approximately 4.50-4.51 g\/cm\u00b3. Qualified design data must be used for actual low-temperature service.<\/li>
  • Not significantly strengthened by conventional heat treatment:<\/strong> Annealing restores ductility and relieves drawing stress. Grade 7 and Grade 7H have the same chemistry, but Grade 7H carries a higher minimum tensile-strength requirement and the designations are not automatically interchangeable.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Chemical Composition<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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    The following limits apply to ASTM B863 Grade 7. Values are mass percentages. Formal acceptance is governed by the contract edition and the producer’s certified report.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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    Element<\/strong><\/td>ASTM B863 Grade 7 requirement<\/strong><\/td><\/tr>
    Palladium, Pd<\/strong><\/td>0.12-0.25%<\/td><\/tr>
    Nitrogen, N<\/strong><\/td>\u22640.03%<\/td><\/tr>
    Carbon, C<\/strong><\/td>\u22640.08%<\/td><\/tr>
    Hydrogen, H<\/strong><\/td>\u22640.015%<\/td><\/tr>
    Iron, Fe<\/strong><\/td>\u22640.30%<\/td><\/tr>
    Oxygen, O<\/strong><\/td>\u22640.25%<\/td><\/tr>
    Residual elements, each<\/strong><\/td>\u22640.10%<\/td><\/tr>
    Residual elements, total<\/strong><\/td>\u22640.40%<\/td><\/tr>
    Titanium, Ti<\/strong><\/td>Balance<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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    Technical references: ASTM B863 grade scope, TIMETAL 50A Grade 2 base-property data, and METALCOR\/BIBUS Grade 7 technical information.<\/p>

    • Palladium:<\/strong> The specified range is 0.12-0.25%. Its main role is to help maintain passivity in selected reducing media and crevice conditions, not to act as a principal strengthening addition.<\/li>
    • Oxygen, iron and nitrogen:<\/strong> Control strength, hardness and ductility. Their limits follow the Grade 2-type base chemistry.<\/li>
    • Hydrogen:<\/strong> Must be strictly controlled. Pickling, cathodic protection and electrochemical service can promote hydrogen pickup; palladium does not eliminate hydride or embrittlement risk.<\/li>
    • Titanium content:<\/strong> ASTM states Titanium: Balance. Do not publish a fixed minimum titanium percentage unless it is supported by the actual heat analysis or an additional guarantee.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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      Mechanical Properties<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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      ASTM B863 includes tensile, elongation and hardness requirements for Grade 7 wire. Properties vary with diameter and delivery condition. Formal acceptance must therefore follow the ordered annealed or cold-worked condition, applicable size range, test method and the official tables of the specified standard edition.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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      Property<\/strong><\/td>Product-page technical statement<\/strong><\/td>Acceptance basis<\/strong><\/td><\/tr>
      Tensile strength<\/strong><\/td>Depends on diameter and annealed\/cold-worked condition<\/td>Applicable ASTM B863 table and purchase order<\/td><\/tr>
      Elongation<\/strong><\/td>Depends on diameter, gauge length and condition<\/td>Applicable ASTM B863 table and purchase order<\/td><\/tr>
      Hardness<\/strong><\/td>The specification includes applicable requirements; one value cannot cover every condition<\/td>Applicable grade, condition and test method<\/td><\/tr>
      Yield strength<\/strong><\/td>Minimum values defined for annealed condition; cold\u2011worked values vary with cold reduction & wire diameter, no universal fixed value<\/td>Specify condition, diameter and acceptance requirements in purchase order if yield strength is required<\/td><\/tr><\/tbody><\/table><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
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      Representative Annealed Grade 7 Properties (METALCOR\/BIBUS reference data, NOT ASTM B863\u201126 wire guaranteed acceptance values)<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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      Property<\/strong><\/td>Representative annealed Grade 2-base\/Grade 7 reference<\/strong><\/td><\/tr>
      Ultimate tensile strength<\/strong><\/td>Representative approx. 485 MPa<\/td><\/tr>
      0.2% yield strength<\/strong><\/td>Representative approx. 345 MPa<\/td><\/tr>
      Elongation<\/strong><\/td>Representative approx. 28%<\/td><\/tr>
      Reduction of area<\/strong><\/td>Representative approx. 57%<\/td><\/tr><\/tbody><\/table><\/div>

      Important:<\/strong> The values above are representative annealed Grade 7 data and are not ASTM B863 wire acceptance values. Diameter, cold reduction and final annealing materially affect strength, elongation and hardness. Quotations, contracts and MTRs should identify diameter, tolerance, condition, surface, coil weight or cut length, and inspection requirements.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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      HTN Supply and Quality Documentation<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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      HTN organizes ASTM B863 Grade 7 palladium-bearing titanium wire supply to customer purchase requirements. Material is produced by qualified titanium-mill resources. Original mill reports, heat traceability, palladium content, full chemistry and property records can be supplied as agreed. HTN reviews the edition, Grade 7\/7H designation, heat number, documents, diameter, tolerance, condition, surface, coil weight or cut length, and can arrange independent retesting, PMI, cut-to-length service, clean packaging and third-party inspection.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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      Typical Applications<\/h3>\t\t\t\t<\/div>\n\t\t\t\t
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      • Corrosion-resistant mesh, filters and mist eliminators for chlor-alkali, salt and chemical-process equipment;<\/li>
      • connection wire, locating wire and mesh for heat exchangers, reactors, condensers and seawater systems;<\/li>
      • racks, baskets, cathode or connection components for plating, anodizing and electrochemical equipment;<\/li>
      • wire parts for high-chloride brine, wet chlorine and qualified acidic process environments;<\/li>
      • corrosion-resistant fastening and support components where gaskets, deposits or structural crevices are expected;<\/li>
      • fine-wire parts for pharmaceutical, high-purity chemical and pollution-control equipment;<\/li>
      • welding filler wire when AWS A5.16 ERTi-7 or the customer consumable specification is met;<\/li>
      • special wire assemblies made to customer drawings for validated corrosion conditions.<\/li><\/ul>

        Application boundary:<\/strong> ASTM B863 Grade 7 wire is not automatically implant grade, aerospace grade or qualified welding filler. Filler use additionally requires AWS A5.16 ERTi-7. Medical, aerospace and pressure-equipment uses require the applicable material and design specifications, drawings and quality system. Grade 7H must be explicitly ordered when its higher-strength designation is required.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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        Request a Quote<\/div>\t\t\t\t<\/div>\n\t\t\t\t
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        Fill in the form below and our team will be happy to assist you<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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