SUH409L has excellent corrosion resistance, high temperature resistance, can realize high efficiency engine and exhaust system, and reduce the thickness of the exhaust system, can reduce the emission of exhaust gas. Low cost, good flexibility, high rate of formation, easy to replace, and is an environmentally friendly new product. Automotive exhaust system is a long car parts, the system to withstand great temperature changes (-20 ~ 850 ℃) and high temperature, high-frequency vibration of high-speed exhaust gas, and is in the car in the environment of large changes, complexity, can withstand the temperature limit of (-20 ~ 650 ℃).
A, SUH409L corresponding to the brand: 1, GB-T standard: digital sign: S11163, new sign: 022Cr11Ti, the old sign: a, 2, the American standard: ASTMA standard: S40920, SAE standard: a, UNS standard: 409, 3, the Japanese standard JIS standard: SUH409L, 4, the German standard DIN standard: 1.4512, 5, the European standard EN standard: X2CrTi12.
Two, SUH409L chemical composition: (1) Carbon C: ≤ 0.030, (2) silicon Si: ≤ 1.00, (3) manganese Mn: ≤ 1.00, (4) Phosphorus P: ≤ 0.040, (5) Sulfur S: ≤ 0.020, (6) Chromium Cr: 10.50 ~ 11.70, (7) Ni Ni: allow plus ≤ 0.6, (8) molybdenum Mo: - , (9) nitrogen N: ≤ 0.03, (10) copper Cu: -, (11) other elements: Ti: 0.15 ~ 0.50, Nb0.10.
Three, SUH409L Physical Properties: ① Density Density (20 ℃)
/kg /dm3:7.75,②Melting point/°C:-, ③Specific heat capacity (0~100℃)/kg/(kg.k):0.46, ④Thermal conductivity/w/(m.k)
100℃-:24.9, (5) Thermal conductivity/w/(m.k)
500℃-:
28.5, (6) Coefficient of linear expansion
/(10-6/k)
0~100℃:10.6,⑦Linear Expansion Coefficient/(10-6/k)
0~572℃:
12,⑧Resistivity(20℃)
/(Ω.mm2/m):0.57,⑨Longitudinal Modulus of Elasticity
(20℃)/GPa. 201,⑩Magnetic:Yes.
Four, SUH409L Mechanical Properties: (1) Delivery Status: Bar Solution Treated, Plate Solution Pickled, (2) Tensile Strength (RM/MPa): 380, (3) Elongation Strength (Rp0.2/MPa): 170, (4) Elongation A/%: 20, (5) Section Shrinkage (Z/%): -.
V. SUH409L heat treatment: ① hardness HBW ≤: annealed 197H, hardness HRB ≤: -, ② heating temperature: 780 ~ 950 ° C, ③ heating mode: fast cooling.
Suitable for extending the life of the car and the car's lightweight, and as a recyclable and environmentally friendly materials, GM, Ford, Volkswagen, DaimlerChrysler, and other major automakers in the exhaust system * using stainless steel. Although SUH409L material tubing is a mature material, the challenges of the range of SUH409L material tubing applications are changing, and those within the industry with higher requirements for strength, corrosion resistance and cost control demand a higher level of craftsmanship and quality from SUH409L material tubing.