Stainless Steel Tube Library: X10CrNiTi189 Stainless Steel Tube Material and Mechanical Properties
Hit：572026-06-29 08:54:15
Stainless Steel Tube Library: X10CrNiTi189 Stainless Steel Tube Material and Mechanical Properties
Technical Report on Material and Mechanical Properties of X10CrNiTi189 Stainless Steel Pipe
1. Material composition (chemical composition)
X10CrNiTi189 is an austenitic stainless steel according to the German DIN standard (DIN 17440), with a stabilized combination of chromium, nickel, and titanium as its core components. It complies with the European EN 10088-2 standard and corresponds to the international grade ASTM 321/UNS S32100. Its typical chemical composition (mass fraction,%) is as follows:
table
Element Content Range (%) Function Description
Low carbon design with carbon (C) ≤ 0.08 suppresses carbide precipitation and enhances resistance to intergranular corrosion
Chromium (Cr) 17.00-19.00 forms a dense Cr ₂ O3 passivation film, providing basic corrosion resistance
Nickel (Ni) 9.00-12.00 stabilizes austenite structure, enhances toughness and acid resistance
Titanium (Ti) ≥ 5 × C (typical 0.50%), ≤ 0.70 is a strong carbide forming element that preferentially generates TiC, preventing the precipitation of Cr ₂ ∝ C ₆ grain boundaries
Silicon (Si) ≤ 1.00 deoxidizer, controlling oxide inclusions
Manganese (Mn) ≤ 2.00 austenite stabilizer, partially replacing nickel
Phosphorus (P) ≤ 0.045 impurity element, strictly controlled to avoid cold brittleness
Sulfur (S) ≤ 0.030 controls processing performance, too high can easily lead to thermal brittleness
Mechanical properties (solution annealed state)
The room temperature mechanical properties of X10CrNiTi189 stainless steel pipe under standard solution treatment (920-1150 ℃ rapid cooling) are as follows:
table
Performance index numerical range standard basis
Tensile strength (Rm) 520-720 MPa EN 10088-2, DIN 17440
Yield strength (Rp0.2) ≥ 200-220 MPa EN 10088-2
Post fracture elongation (A) ≥ 40% EN 10088-2
Brinell hardness (HB) ≤ 215 EN 10088-2
Density ≈ 7.93 g/cm ³ Industrial measured value
Compared with unstabilized 304 (X5CrNi18-10), its room temperature strength is slightly lower, but its high-temperature endurance strength and creep resistance are significantly improved. The endurance strength can reach about 60 MPa after 10000 hours at 700 ℃.
