TP321 and TP321H are different; TP321H is high-carbon and more heat-resistant.
TP321 is a 321 Austenitic Stainless Steel, equivalent to the domestic grade 0Cr18Ni10Ti. 321 Stainless Steel is a Ni-Cr-Mo type Austenitic Stainless Steel, with performance very similar to 304, but with the addition of titanium, it offers improved grain boundary corrosion resistance and high-temperature strength. The addition of titanium effectively controls the formation of chromium carbides. This alloy has excellent welding properties and can be joined using various methods such as gas tungsten arc welding, argon arc welding, resistance welding, and brazing. Large or complex welded assemblies should be annealed for 1 hour at 870℃ after melting to relieve welding stress.
321H is a U.S. standard Austenitic heat-resisting steel forgings, complying with standard: ASTM A959-2011.
321H is a titanium-stabilized austenitic stainless steel with excellent overall corrosion resistance. It boasts superior intergranular corrosion resistance when exposed to temperatures ranging from 800-1500°F (427-816°C) for carbide precipitation. This alloy can withstand oxidation up to 1500°F (816°C) and exhibits higher creep and stress-rupture properties than alloys 304 and 304L. Additionally, it maintains good low-temperature toughness.
321H Stainless Steel: This steel boasts excellent corrosion resistance, particularly in oxidizing media. Due to its good heat resistance and oxidation resistance, it is often used as heat-resistant steel.
One, 321H equivalent grade: 1, GB-T Standard: Numbered Mark: S32169, New Mark: 07Cr19Ni11Ti, Old Mark: 1Cr18Ni11Ti; 2, ASTM Standard: S32109, SAE Standard: One, UNS Standard: 321H; 3, JIS Standard: SUS321HTB; 4, DIN Standard: "1.4940
1.4541, "5. European Standard EN: X8CrNiTi18-10,"
X7CrNiTi18-10, "NF standard: /, BS standard: 321S20.
Section 2, 321H Stainless Steel Chemical Composition: Carbon (C): 0.04~0.10, Silicon (Si): ≤0.75, Manganese (Mn): ≤2.00, Phosphorus (P): ≤0.030, Sulfur (S): ≤0.030, Chromium (Cr): 17.00~20.00, Nickel (Ni): 9.00~13.00, Other Elements: Titanium (Ti) ≥4C~0.60.
Section 3, Item 3: Physical Properties of 321H Stainless Steel: Density (at 20°C)
/kg/dm³: "8.03, Magnetic: None.
Four, 321H Stainless Steel Mechanical Properties: Delivery Condition: Rods solution treated, Sheets solution cleaned, Tensile Strength (RM/MPa): 520, Yield Strength (Rp0.2/MPa): 205, Elongation A/%: 40, Reduction of Area Z/%: 50.
Five, 321H Stainless Steel Heat Treatment: Hardness HBW ≤: Austenitizing 187, Hardness HRB ≤: 90, Heating Temperature: 920~1150, Cooling Method: Quenching.
321H Stainless Steel Applications: Used for manufacturing boiler superheaters, heat exchangers, condensers, catalytic tubes, cracking tube assemblies, and other steel pipes and pipe fittings.
