Stainless Steel Tube Information: Chemical Composition and Mechanical Properties of American Standard TP321 Stainless Steel Tube
Hit：212026-04-24 15:41:49
Stainless Steel Tube Information: Chemical Composition and Mechanical Properties of American Standard TP321 Stainless Steel Tube
The chemical composition and mechanical properties of TP321 stainless steel pipes are as follows:
chemical composition
TP321 stainless steel pipe (corresponding to Chinese grades 0Cr18Ni10Ti or 1Cr18Ni9Ti) is a Ni Cr Ti austenitic stainless steel with a core chemical composition range of:
Carbon C: ≤ 0.08%
Silicon Si: ≤ 1.00%
Manganese Mn: ≤ 2.00%
Sulfur S: ≤ 0.030%
Phosphorus P: ≤ 0.045%
Chromium Cr: 17.00%~19.00%
Nickel Ni: 9.00%~12.00%
Titanium Ti: ≥ 5 × C% (usually controlled above 0.7%)
Among them, titanium (Ti), as a stabilizing element, can combine with carbon to form stable titanium carbide (TiC), effectively suppressing the precipitation of chromium carbide (Cr ₂ ∝ C ₆) at grain boundaries, thereby significantly improving the material's resistance to intergranular corrosion and high-temperature strength.
mechanical properties
The typical room temperature mechanical properties of TP321 stainless steel pipe in solution treated state are:
Tensile strength σ b: ≥ 520 MPa
Conditional yield strength σ ₀ ₂：≥205 MPa
Elongation rate δ 5: ≥ 40%
Shrinkage rate of cross-section: ≥ 50%
Hardness: ≤ 187 HB; ≤ 90 HRB; ≤200 HV
This material has excellent high-temperature stress fracture resistance and creep resistance, suitable for high-temperature environments of 500-800 ℃, especially for industrial equipment such as boilers, heat exchangers, and aircraft high-temperature components that require high heat resistance and corrosion resistance.
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