{"id":2457,"date":"2026-01-24T07:40:32","date_gmt":"2026-01-24T06:40:32","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2457"},"modified":"2026-01-30T03:00:38","modified_gmt":"2026-01-30T02:00:38","slug":"alloy-20-vs-904l","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/ar\/alloy-20-vs-904l\/","title":{"rendered":"\u0627\u0644\u0633\u0628\u064a\u0643\u0629 20 \u0645\u0642\u0627\u0628\u0644 904L: \u0645\u0642\u0627\u0648\u0645\u0629 \u062d\u0645\u0636 \u0627\u0644\u0643\u0628\u0631\u064a\u062a\u064a\u0643"},"content":{"rendered":"

\u0641\u064a \u0639\u0627\u0644\u0645 \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0623\u0648\u0633\u062a\u0646\u064a\u062a\u064a \u0627\u0644\u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u0635\u062f\u0623 \u0639\u0627\u0644\u064a \u0627\u0644\u0623\u062f\u0627\u0621\u060c \u063a\u0627\u0644\u0628\u064b\u0627 \u0645\u0627 \u064a\u062d\u062f\u062f \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631 \u0628\u064a\u0646 \u0633\u0628\u064a\u0643\u0629 20 (UNS N08020) \u0648904L (UNS N08904) \u0637\u0648\u0644 \u0639\u0645\u0631 \u0627\u0644\u0645\u0639\u062f\u0627\u062a \u0627\u0644\u0635\u0646\u0627\u0639\u064a\u0629 \u0627\u0644\u062d\u0631\u062c\u0629. \u0648\u0628\u064a\u0646\u0645\u0627 \u0635\u064f\u0645\u0645\u062a \u0643\u0644\u062a\u0627 \u0627\u0644\u0633\u0628\u064a\u0643\u062a\u064a\u0646 \u0644\u0633\u062f \u0627\u0644\u0641\u062c\u0648\u0629 \u0628\u064a\u0646 \u0627\u0644\u0641\u0648\u0644\u0627\u0630 \u0627\u0644\u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u0635\u062f\u0623 316L \u0627\u0644\u0642\u064a\u0627\u0633\u064a \u0648\u0627\u0644\u0633\u0628\u0627\u0626\u0643 \u0627\u0644\u0641\u0627\u0626\u0642\u0629 \u0627\u0644\u0642\u0627\u0626\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0646\u064a\u0643\u0644 \u0639\u0627\u0644\u064a\u0629 \u0627\u0644\u062a\u0643\u0644\u0641\u0629\u060c \u0625\u0644\u0627 \u0623\u0646\u0647\u0645\u0627 \u064a\u062d\u062a\u0644\u0627\u0646 \u0645\u0643\u0627\u0646\u064b\u0627 \u0645\u062a\u0645\u064a\u0632\u064b\u0627 \u0641\u064a \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062a\u0622\u0643\u0644\u060c \u062e\u0627\u0635\u0629\u064b \u0641\u064a \u0627\u0644\u0628\u064a\u0626\u0627\u062a \u0627\u0644\u062d\u0645\u0636\u064a\u0629.<\/p>\n

\"\"<\/p>\n

\u0645\u0642\u0627\u0631\u0646\u0629 \u0633\u0628\u064a\u0643\u0629 20 \u0645\u0642\u0627\u0628\u0644 904L: \u0627\u0644\u0641\u0631\u0648\u0642 \u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a\u0629 \u0648\u0627\u0644\u0641\u064a\u0632\u064a\u0627\u0626\u064a\u0629 \u0627\u0644\u062f\u0642\u064a\u0642\u0629<\/h2>\n

Understanding the Alloy 20 vs 904L comparison begins with their chemical signatures. Alloy 20 is frequently classified as a “super-austenitic” stainless steel or a nickel alloy because of its high nickel content (approx. 35%). This high nickel concentration, combined with copper and molybdenum, provides exceptional resistance to sulfuric acid at various temperatures and concentrations.<\/p>\n

\u0648\u0641\u064a \u0627\u0644\u0645\u0642\u0627\u0628\u0644\u060c \u0641\u0625\u0646 904L \u0639\u0628\u0627\u0631\u0629 \u0639\u0646 \u0641\u0648\u0644\u0627\u0630 \u0623\u0648\u0633\u062a\u0646\u064a\u062a\u064a \u0645\u0642\u0627\u0648\u0645 \u0644\u0644\u0635\u062f\u0623 \u0639\u0627\u0644\u064a \u0627\u0644\u0633\u0628\u0627\u0626\u0643 \u064a\u062d\u062a\u0648\u064a \u0639\u0644\u0649 \u0646\u0633\u0628\u0629 \u0646\u064a\u0643\u0644 \u062a\u0628\u0644\u063a 251 \u062a\u064a\u0631\u0627\u0628\u0627\u064a\u062a 3 \u062a\u064a\u0631\u0627\u0628\u0627\u064a\u062a \u062a\u0642\u0631\u064a\u0628\u064b\u0627. \u0648\u0639\u0644\u0649 \u0627\u0644\u0631\u063a\u0645 \u0645\u0646 \u0627\u062d\u062a\u0648\u0627\u0626\u0647 \u0623\u064a\u0636\u064b\u0627 \u0639\u0644\u0649 \u0627\u0644\u0646\u062d\u0627\u0633 \u0644\u062a\u0639\u0632\u064a\u0632 \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0623\u062d\u0645\u0627\u0636 \u0627\u0644\u0645\u062e\u062a\u0632\u0644\u0629 \u0627\u0644\u0642\u0648\u064a\u0629\u060c \u0625\u0644\u0627 \u0623\u0646\u0647 \u062a\u0645 \u062a\u0637\u0648\u064a\u0631\u0647 \u0641\u064a \u0627\u0644\u0645\u0642\u0627\u0645 \u0627\u0644\u0623\u0648\u0644 \u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062a\u0622\u0643\u0644 \u0627\u0644\u0646\u0627\u062a\u062c \u0639\u0646 \u0627\u0644\u062a\u0646\u0642\u0631 \u0648\u0627\u0644\u062a\u0622\u0643\u0644 \u0627\u0644\u0634\u0642\u0648\u0642 \u0641\u064a \u0628\u064a\u0626\u0627\u062a \u062d\u0645\u0636 \u0627\u0644\u0643\u0628\u0631\u064a\u062a\u064a\u0643 \u0627\u0644\u0645\u062e\u0641\u0641 \u0648\u062d\u0645\u0636 \u0627\u0644\u0641\u0648\u0633\u0641\u0648\u0631\u064a\u0643.<\/p>\n

\u062c\u062f\u0648\u0644 \u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0641\u0646\u064a\u0629<\/h3>\n\n\n\n\n\n\n\n\n\n\n
\u0627\u0644\u0645\u0645\u062a\u0644\u0643\u0627\u062a<\/td>\n\u0633\u0628\u064a\u0643\u0629 20 (UNS N08020)<\/td>\n904 \u0644 (\u0631\u0642\u0645 \u0627\u0644\u0623\u0645\u0645 \u0627\u0644\u0645\u062a\u062d\u062f\u0629 08904)<\/td>\n<\/tr>\n<\/thead>\n
\u0627\u0644\u0646\u064a\u0643\u0644 (\u0646\u064a)<\/td>\n32.51 \u062a 3 \u062a - 35.01 \u062a 3 \u062a<\/td>\n23.0% - 28.0%<\/td>\n<\/tr>\n
\u0627\u0644\u0643\u0631\u0648\u0645 (Cr)<\/td>\n19.0% - 21.0%<\/td>\n19.0% - 23.0%<\/td>\n<\/tr>\n
\u0627\u0644\u0645\u0648\u0644\u064a\u0628\u062f\u064a\u0646\u0648\u0645 (Mo)<\/td>\n2.0% - 3.0%<\/td>\n4.0% - 5.0%<\/td>\n<\/tr>\n
\u0627\u0644\u0646\u062d\u0627\u0633 (\u0627\u0644\u0646\u062d\u0627\u0633)<\/td>\n3.0% - 4.0%<\/td>\n1.0% - 2.0%<\/td>\n<\/tr>\n
\u0642\u064a\u0645\u0629 PREN<\/td>\n~24 – 26<\/td>\n~34 – 36<\/td>\n<\/tr>\n
\u0642\u0648\u0629 \u0627\u0644\u0645\u0631\u062f\u0648\u062f<\/td>\n35,000 \u0631\u0637\u0644 \u0644\u0643\u0644 \u0628\u0648\u0635\u0629 \u0645\u0631\u0628\u0639\u0629 (241 \u0645\u064a\u062c\u0627 \u0628\u0627\u0633\u0643\u0627\u0644)<\/td>\n31,000 \u0631\u0637\u0644 \u0644\u0643\u0644 \u0628\u0648\u0635\u0629 \u0645\u0631\u0628\u0639\u0629 (215 \u0645\u064a\u062c\u0627 \u0628\u0627\u0633\u0643\u0627\u0644)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0633\u0628\u064a\u0643\u0629 20 \u0645\u0642\u0627\u0628\u0644 904L: \u0643\u064a\u0641\u064a\u0629 \u0627\u062e\u062a\u064a\u0627\u0631 \u0627\u0644\u0645\u0627\u062f\u0629 \u0627\u0644\u0645\u0646\u0627\u0633\u0628\u0629<\/h2>\n

\u0639\u0646\u062f \u0627\u062a\u062e\u0627\u0630 \u0642\u0631\u0627\u0631 \u0628\u0634\u0623\u0646 \u0633\u0628\u064a\u0643\u0629 20 \u0645\u0642\u0627\u0628\u0644 904L: \u0643\u064a\u0641\u064a\u0629 \u0627\u0644\u0627\u062e\u062a\u064a\u0627\u0631\u060c \u0641\u0625\u0646 \u0627\u0644\u0639\u0627\u0645\u0644 \u0627\u0644\u0623\u0633\u0627\u0633\u064a \u0647\u0648 \u0627\u0644\u0637\u0628\u064a\u0639\u0629 \u0627\u0644\u0645\u062d\u062f\u062f\u0629 \u0644\u0644\u0648\u0633\u0627\u0626\u0637 \u0627\u0644\u0645\u0633\u0628\u0628\u0629 \u0644\u0644\u062a\u0622\u0643\u0644.<\/p>\n

    \n
  1. \n

    \u062a\u0631\u0643\u064a\u0632 \u0627\u0644\u0643\u0644\u0648\u0631\u064a\u062f \u0645\u0642\u0627\u0628\u0644 \u062a\u0631\u0643\u064a\u0632 \u0627\u0644\u062d\u0645\u0636: \u0625\u0630\u0627 \u0643\u0627\u0646 \u0627\u0633\u062a\u062e\u062f\u0627\u0645\u0643 \u064a\u0646\u0637\u0648\u064a \u0639\u0644\u0649 \u062a\u0631\u0643\u064a\u0632\u0627\u062a \u0639\u0627\u0644\u064a\u0629 \u0645\u0646 \u0627\u0644\u0643\u0644\u0648\u0631\u064a\u062f \u062d\u064a\u062b \u064a\u0643\u0648\u0646 \u0627\u0644\u062a\u0646\u0642\u0631 \u0647\u0648 \u0627\u0644\u0634\u0627\u063a\u0644 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u060c \u0641\u063a\u0627\u0644\u0628\u064b\u0627 \u0645\u0627 \u064a\u0643\u0648\u0646 904L \u0647\u0648 \u0627\u0644\u062e\u064a\u0627\u0631 \u0627\u0644\u0623\u0641\u0636\u0644 \u0646\u0638\u0631\u064b\u0627 \u0644\u0645\u062d\u062a\u0648\u0627\u0647 \u0627\u0644\u0639\u0627\u0644\u064a \u0645\u0646 \u0627\u0644\u0645\u0648\u0644\u064a\u0628\u062f\u064a\u0646\u0648\u0645 \u0648\u0627\u0644\u0631\u0642\u0645 \u0627\u0644\u0645\u0643\u0627\u0641\u0626 \u0644\u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u062a\u0646\u0642\u0631 (PREN).<\/p>\n<\/li>\n

  2. \n

    Sulfuric Acid Purity: Alloy 20 is the industry standard for “Sulfuric Acid Service.” It excels in 20% to 40% sulfuric acid concentrations where other steels fail. Its niobium (columbium) stabilization also prevents intergranular corrosion during welding.<\/p>\n<\/li>\n

  3. \n

    \u0643\u0641\u0627\u0621\u0629 \u0627\u0644\u062a\u0643\u0644\u0641\u0629: \u0628\u0634\u0643\u0644 \u0639\u0627\u0645\u060c \u064a\u0639\u062a\u0628\u0631 904L \u0623\u0643\u062b\u0631 \u0641\u0639\u0627\u0644\u064a\u0629 \u0645\u0646 \u062d\u064a\u062b \u0627\u0644\u062a\u0643\u0644\u0641\u0629 \u0644\u0644\u062a\u0639\u0627\u0645\u0644 \u0645\u0639 \u0627\u0644\u0645\u0648\u0627\u062f \u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a\u0629 \u0644\u0644\u0623\u063a\u0631\u0627\u0636 \u0627\u0644\u0639\u0627\u0645\u0629\u060c \u0641\u064a \u062d\u064a\u0646 \u0623\u0646 \u0633\u0628\u064a\u0643\u0629 20 \u0647\u064a \u0627\u0633\u062a\u062b\u0645\u0627\u0631 \u0645\u062a\u062e\u0635\u0635 \u0644\u0646\u0642\u0627\u0637 \u063a\u0644\u064a\u0627\u0646 \u0627\u0644\u0623\u062d\u0645\u0627\u0636 \u0627\u0644\u0642\u0648\u064a\u0629 \u0648\u0623\u0646\u0627\u0628\u064a\u0628 \u0627\u0644\u0645\u0628\u0627\u062f\u0644\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u064a\u0629.<\/p>\n<\/li>\n<\/ol>\n

    \"\"<\/h2>\n

    \u0633\u0628\u064a\u0643\u0629 20 \u0645\u0642\u0627\u0628\u0644 904L: \u0627\u0633\u062a\u0631\u0627\u062a\u064a\u062c\u064a\u0627\u062a \u0627\u062e\u062a\u064a\u0627\u0631 \u0627\u0644\u0645\u0635\u0646\u0639 \u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a<\/h2>\n

    \u0641\u064a \u0633\u064a\u0627\u0642 \u0627\u062e\u062a\u064a\u0627\u0631 \u0633\u0628\u064a\u0643\u0629 20 \u0645\u0642\u0627\u0628\u0644 904L \u0644\u0644\u0645\u0635\u0627\u0646\u0639 \u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a\u0629\u060c \u064a\u062c\u0628 \u0639\u0644\u0649 \u0627\u0644\u0645\u0647\u0646\u062f\u0633\u064a\u0646 \u0627\u0644\u0646\u0638\u0631 \u0641\u064a \u0627\u0644\u062a\u0643\u0644\u0641\u0629 \u0627\u0644\u0625\u062c\u0645\u0627\u0644\u064a\u0629 \u0644\u062f\u0648\u0631\u0629 \u0627\u0644\u062d\u064a\u0627\u0629. \u0641\u064a \u0645\u0635\u0627\u0646\u0639 \u0627\u0644\u0645\u0639\u0627\u0644\u062c\u0629 \u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a\u0629\u060c \u062a\u064f\u0639\u062f \u0633\u0628\u064a\u0643\u0629 20 \u0647\u064a \u0627\u0644\u0645\u0627\u062f\u0629 \u0627\u0644\u0645\u0641\u0636\u0644\u0629 \u0644\u062e\u0632\u0627\u0646\u0627\u062a \u0627\u0644\u062a\u062e\u0644\u064a\u0644 \u0648\u062e\u0632\u0627\u0646\u0627\u062a \u0627\u0644\u062e\u0644\u0637 \u0648\u0627\u0644\u0645\u0628\u0627\u062f\u0644\u0627\u062a \u0627\u0644\u062d\u0631\u0627\u0631\u064a\u0629 \u0627\u0644\u062a\u064a \u062a\u062a\u0639\u0627\u0645\u0644 \u0645\u0639 \u062a\u0631\u0643\u064a\u0632\u0627\u062a \u062d\u0645\u0636 \u0627\u0644\u0643\u0628\u0631\u064a\u062a\u064a\u0643 \u062d\u062a\u0649 95% \u0641\u064a \u062f\u0631\u062c\u0627\u062a \u062d\u0631\u0627\u0631\u0629 \u0645\u0631\u062a\u0641\u0639\u0629.<\/p>\n

    Conversely, 904L is the go-to for flue-gas desulfurization (FGD) systems, pharmaceutical manufacturing, and paper pulp processing. It provides a robust defense against “warm sea water” and brackish water, making it ideal for coastal chemical facilities where external salt spray adds an extra layer of corrosive stress to the piping.<\/p>\n

    \n

    \u0623\u0633\u0626\u0644\u0629 \u0648\u0623\u062c\u0648\u0628\u0629 \u0630\u0627\u062a \u0635\u0644\u0629<\/h3>\n

    \u06331: \u0647\u0644 \u064a\u0645\u0643\u0646 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0633\u0628\u064a\u0643\u0629 20 \u0641\u064a \u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0645\u064a\u0627\u0647 \u0627\u0644\u0628\u062d\u0631\u061f \u062c1: \u0639\u0644\u0649 \u0627\u0644\u0631\u063a\u0645 \u0645\u0646 \u0623\u0646 \u0633\u0628\u064a\u0643\u0629 20 \u062a\u062a\u0645\u062a\u0639 \u0628\u0645\u0642\u0627\u0648\u0645\u0629 \u062c\u064a\u062f\u0629\u060c \u0625\u0644\u0627 \u0623\u0646 \u0633\u0628\u064a\u0643\u0629 904L \u0645\u0641\u0636\u0644\u0629 \u0639\u0645\u0648\u0645\u064b\u0627 \u0644\u0645\u064a\u0627\u0647 \u0627\u0644\u0628\u062d\u0631 \u0623\u0648 \u0627\u0644\u0628\u064a\u0626\u0627\u062a \u0639\u0627\u0644\u064a\u0629 \u0627\u0644\u0643\u0644\u0648\u0631\u064a\u062f \u0646\u0638\u0631\u064b\u0627 \u0644\u0627\u0631\u062a\u0641\u0627\u0639 \u0645\u0639\u062f\u0644 \u0645\u0642\u0627\u0648\u0645\u0629 \u0627\u0644\u0633\u0628\u0627\u0626\u0643 (34-36)\u060c \u0645\u0645\u0627 \u064a\u0648\u0641\u0631 \u062d\u0645\u0627\u064a\u0629 \u0623\u0641\u0636\u0644 \u0636\u062f \u0627\u0644\u062a\u0646\u0642\u0631.<\/p>\n

    Q2: Why is Alloy 20 called “The Carpenter 20” alloy? A2: It was originally developed by Carpenter Technology Corporation. Today, many manufacturers produce it under the UNS N08020 specification, but it remains the benchmark for sulfuric acid resistance.<\/p>\n

    \u06333: \u0645\u0627 \u0647\u064a \u0627\u0644\u0633\u0628\u064a\u0643\u0629 \u0627\u0644\u0623\u0633\u0647\u0644 \u0644\u062d\u0627\u0645\u064b\u0627 \u0641\u064a \u0627\u0644\u0645\u0635\u0627\u0646\u0639 \u0627\u0644\u0643\u064a\u0645\u064a\u0627\u0626\u064a\u0629\u061f \u062c3: \u064a\u064f\u0638\u0647\u0631 \u0643\u0644\u0627\u0647\u0645\u0627 \u0642\u0627\u0628\u0644\u064a\u0629 \u0644\u062d\u0627\u0645 \u062c\u064a\u062f\u0629 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0637\u0631\u0642 \u0627\u0644\u0634\u0627\u0626\u0639\u0629 \u0645\u062b\u0644 TIG \u0623\u0648 MIG. \u0648\u0645\u0639 \u0630\u0644\u0643\u060c \u0641\u0625\u0646 \u062a\u062b\u0628\u064a\u062a \u0627\u0644\u0646\u064a\u0648\u0628\u064a\u0648\u0645 \u0641\u064a \u0633\u0628\u064a\u0643\u0629 20 \u064a\u062c\u0639\u0644\u0647\u0627 \u0623\u0643\u062b\u0631 \u0645\u0642\u0627\u0648\u0645\u0629 \u0642\u0644\u064a\u0644\u0627\u064b \u0644\u062a\u0631\u0633\u064a\u0628 \u0627\u0644\u0643\u0631\u0628\u064a\u062f \u0641\u064a \u0627\u0644\u0645\u0646\u0637\u0642\u0629 \u0627\u0644\u0645\u062a\u0623\u062b\u0631\u0629 \u0628\u0627\u0644\u062d\u0631\u0627\u0631\u0629 (HAZ) \u0645\u0642\u0627\u0631\u0646\u0629\u064b \u0628\u0627\u0644\u0633\u0628\u0627\u0626\u0643 904L.<\/p>","protected":false},"excerpt":{"rendered":"

    In the realm of high-performance austenitic stainless steels, the choice between Alloy 20 (UNS N08020) and 904L (UNS N08904) often defines the longevity of critical industrial equipment. While both alloys were engineered to bridge the gap between standard 316L stainless steel and high-cost nickel-based superalloys, they occupy distinct niches in corrosion resistance, particularly in acidic […]<\/p>","protected":false},"author":1,"featured_media":2458,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2457","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"spectra_custom_meta":{"_edit_lock":["1769738438:1"],"_edit_last":["1"],"rank_math_seo_score":["69"],"rank_math_description":["A technical guide comparing Alloy 20 and 904L stainless steels. Explore chemical properties, sulfuric acid resistance, and chemical plant selection."],"rank_math_focus_keyword":["alloy 20 vs 904l"],"_thumbnail_id":["2458"],"_wp_page_template":["default"],"rank_math_internal_links_processed":["1"],"site-sidebar-layout":["default"],"ast-site-content-layout":["default"],"site-content-style":["default"],"site-sidebar-style":["default"],"theme-transparent-header-meta":["default"],"ilj_blacklistdefinition":["a:0:{}"],"ilj_linkdefinition":["a:1:{i:0;s:16:\"Alloy 20 vs 904L\";}"],"astra-migrate-meta-layouts":["set"],"_uag_page_assets":["a:9:{s:3:\"css\";s:263:\".uag-blocks-common-selector{z-index:var(--z-index-desktop) !important}@media (max-width: 976px){.uag-blocks-common-selector{z-index:var(--z-index-tablet) !important}}@media (max-width: 767px){.uag-blocks-common-selector{z-index:var(--z-index-mobile) !important}}\n\";s:2:\"js\";s:0:\"\";s:18:\"current_block_list\";a:8:{i:0;s:11:\"core\/search\";i:1;s:10:\"core\/group\";i:2;s:12:\"core\/heading\";i:3;s:17:\"core\/latest-posts\";i:4;s:20:\"core\/latest-comments\";i:5;s:13:\"core\/archives\";i:6;s:15:\"core\/categories\";i:7;s:10:\"core\/image\";}s:8:\"uag_flag\";b:0;s:11:\"uag_version\";s:10:\"1776556632\";s:6:\"gfonts\";a:0:{}s:10:\"gfonts_url\";s:0:\"\";s:12:\"gfonts_files\";a:0:{}s:14:\"uag_faq_layout\";b:0;}"],"_uag_css_file_name":["uag-css-2457.css"],"_elementor_page_assets":["a:0:{}"]},"uagb_featured_image_src":{"full":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/74.jpg",1200,670,false],"thumbnail":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/74-150x150.jpg",150,150,true],"medium":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/74-300x168.jpg",300,168,true],"medium_large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/74-768x429.jpg",768,429,true],"large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/74-1024x572.jpg",1024,572,true],"1536x1536":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/74.jpg",1200,670,false],"2048x2048":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/74.jpg",1200,670,false],"trp-custom-language-flag":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/74-18x10.jpg",18,10,true]},"uagb_author_info":{"display_name":"nickel","author_link":"https:\/\/www.nickelcasting.com\/ar\/author\/nickel\/"},"uagb_comment_info":0,"uagb_excerpt":"In the realm of high-performance austenitic stainless steels, the choice between Alloy 20 (UNS N08020) and 904L (UNS N08904) often defines the longevity of critical industrial equipment. While both alloys were engineered to bridge the gap between standard 316L stainless steel and high-cost nickel-based superalloys, they occupy distinct niches in corrosion resistance, particularly in acidic…","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/ar\/wp-json\/wp\/v2\/posts\/2457","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ar\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ar\/wp-json\/wp\/v2\/comments?post=2457"}],"version-history":[{"count":1,"href":"https:\/\/www.nickelcasting.com\/ar\/wp-json\/wp\/v2\/posts\/2457\/revisions"}],"predecessor-version":[{"id":2460,"href":"https:\/\/www.nickelcasting.com\/ar\/wp-json\/wp\/v2\/posts\/2457\/revisions\/2460"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ar\/wp-json\/wp\/v2\/media\/2458"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/ar\/wp-json\/wp\/v2\/media?parent=2457"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ar\/wp-json\/wp\/v2\/categories?post=2457"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/ar\/wp-json\/wp\/v2\/tags?post=2457"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}