{"id":5108,"date":"2026-09-16T15:29:58","date_gmt":"2026-09-16T07:29:58","guid":{"rendered":"https:\/\/jblstainless.com\/?post_type=product&p=5108"},"modified":"2026-09-16T15:29:59","modified_gmt":"2026-09-16T07:29:59","slug":"1-4550-aisi-347-347h-stainless-steel-alloys","status":"publish","type":"product","link":"https:\/\/jblstainless.com\/ha\/1-4550-aisi-347-347h-stainless-steel-alloys\/","title":{"rendered":"1.4550 Karfe mara tsatsa na ha\u0257in AISI 347 347H"},"content":{"rendered":"
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Grade 347 is a niobium-containing austenitic stainless steel, and 347H is its high-carbon variant; the key difference in their elemental composition lies in the levels of carbon, titanium, and niobium.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Analysis of Key Differences Between 347 and 347H Stainless Steels<\/span><\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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347 chemical component\uff1a<\/span><\/p>

\uff08Cr\uff09\uff1a17.00%-19.00%<\/p><\/div>

\uff08Ni\uff09\uff1a9.00%-13.00%<\/p><\/div>

\uff08Nb\/Ta\uff09\uff1a10*C-1.10%<\/p><\/div>

\uff08Mn\uff09\uff1a2.00%<\/p><\/div>

\uff08Si\uff09\uff1a1.00%<\/p><\/div>

\uff08P\uff09\uff1a0.040%<\/p><\/div>

\uff08S\uff09\uff1a0.030%<\/p><\/div>

\uff08C\uff09\uff1a0.08%<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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347H chemical component\uff1a<\/span><\/p>

\u00a0Cr\uff1a17.00~19.00<\/p>

\u00a0Ni\uff1a9.00~12.00<\/p>

\u00a0Nb\uff1a0.1~1.00<\/p>

\u00a0Mn\uff1a\u22642.00<\/p>

\u00a0Si\uff1a\u22641.00<\/p>

\u00a0P\uff1a\u22640.045<\/p>

\u00a0S\uff1a\u22640.030<\/p>

\u00a0C\uff1a\u22640.04-0.10<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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347 mechanical property\uff1a<\/span><\/p>

Tensile Strength: \u2265515 MPa<\/p>

Yield Strength: \u2265205 MPa<\/p>

Elongation: \u226540%<\/p>

Hardness: \u2264201 HB; \u226495 HRB; \u2264219 HV<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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347H mechanical property\uff1a<\/span><\/p>

Tensile strength (Rm): \u2265 515 MPa<\/p>

Yield strength (Rp0.2): \u2265 205 MPa<\/p>

Elongation (A): \u2265 35%<\/p>

Hardness: \u2264 187 HB (Brinell hardness) or \u2264 90 HRB (Rockwell hardness)<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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347 High-Temperature Performance\uff1a<\/span><\/p>

In intermittent high-temperature scenarios, carbides may precipitate in 347 Stainless Steel.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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347 H High-Temperature Performance\uff1a<\/span>\u00a0<\/p>

347H has a higher carbon content and offers approximately 20% better high-temperature creep resistance than SS347, making it suitable for sustained high-temperature environments.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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347 Processing and welding performance\uff1a<\/span><\/p>

Due to the stabilizing effect of niobium, 347 stainless steel is less prone to intergranular corrosion during welding, and various welding methods can be adopted, ensuring the welding quality easily.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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347H Processing and welding performance\uff1a<\/span>\u00a0<\/p>

When welding 347H, it is necessary to pay more attention to controlling the welding process parameters to avoid possible welding defects caused by the high carbon content.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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347 application scenarios\uff1a<\/span><\/p>

“Corrosion-resistant + High-temperature equipment”<\/p>

  • Food Processing Machinery<\/li>
  • Architectural<\/li>
  • Decoration
    Storage Containers<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    347H application scenarios\uff1a<\/span><\/p>

    “High temperature + long-term loading”<\/p>

    • Superheater<\/li>
    • Hydrogenation reactor<\/li>
    • Nuclear power plant<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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      1.4550 Karfe mara tsatsa na ha\u0257in AISI 347 347H<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

      1.4550 Karfe mara tsatsa na ha\u0257in AISI 347 347H<\/p>\n

      Maintenance and Care\uff1a<\/span><\/p>\n

      —-Regularly clean the surface<\/span>
      \n—-Avoid using cleaning agents containing chloride ions<\/span>
      \n—-Store in a dry and ventilated place<\/span><\/p>","protected":false},"featured_media":5126,"template":"","meta":{"_eb_attr":"","_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":""},"product_brand":[],"product_cat":[40],"product_tag":[],"class_list":["post-5108","product","type-product","status-publish","has-post-thumbnail","product_cat-stainless-steel-plate-coil","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/jblstainless.com\/ha\/wp-json\/wp\/v2\/product\/5108","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/jblstainless.com\/ha\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/jblstainless.com\/ha\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":15,"href":"https:\/\/jblstainless.com\/ha\/wp-json\/wp\/v2\/product\/5108\/revisions"}],"predecessor-version":[{"id":5130,"href":"https:\/\/jblstainless.com\/ha\/wp-json\/wp\/v2\/product\/5108\/revisions\/5130"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/jblstainless.com\/ha\/wp-json\/wp\/v2\/media\/5126"}],"wp:attachment":[{"href":"https:\/\/jblstainless.com\/ha\/wp-json\/wp\/v2\/media?parent=5108"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/jblstainless.com\/ha\/wp-json\/wp\/v2\/product_brand?post=5108"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/jblstainless.com\/ha\/wp-json\/wp\/v2\/product_cat?post=5108"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/jblstainless.com\/ha\/wp-json\/wp\/v2\/product_tag?post=5108"}],"curies":[{"name":"\u0199ir\u0199irar rubutu","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}