1.4512, X2CrTi12, AISI 409 - stainless steel

Stainless chromium-titanium steel with ferritic structure X2CrTi12, 1.4512, AISI 409 according to EN 10088-2.

Standards Steel Grades
Chemical Composition %
C: Mn: Si: P: S: Cr: Ni: Ti: N:
EN X2CrTi12 - 1.4512
<0.03 <1.0 <1.0 <0.040 <0.015 10.5 - 12.5 - <0.65 -
EN X5CrTi12
<0.08 <1.0 <1.0 <0.040 <0.030 10.5 - 12.5 - <1.0  
AFNOR Z3CT12
<0.03 <0.8 <0.75 <0.040 <0.015 10.5 - 12.5 - <0.6 <0.025
SEW 470 X7CrTi12 - 1.4720
<0.08 <1.0 <1.0 <0.040 <0.030 10.5 - 12.5 - <1.0 -
BS 409S19
<0.08 <1.0 <1.0 <0.040 <0.030 10.5 - 12.5 <1.0 <1.0 -
ISO X6CrTi12
<0.08 <1.0 <1.0 <0.040 <0.030 10.5 - 12.5 <0.5 <0.65 -
UNI X6CrTi12
<0.08 <1.0 <1.0 <0.040 <0.030 10.5 - 12.5 <0.5 <0.8 -
ASTM AISI 409 - UNS S40900 - TP409
<0.08 <1.0 <1.0 <0.045 <0.030 10.5 - 11.7 <0.5 <0.75 -

Specification and application

X2CrTi12 steel is a ferritic grade with an average of 11% chromium and 1% of Titanium in the chemical composition. Produced mostly in the form of sheets, strips and bars, it finds its application mainly in the automotive industry or in the machine industry.

Exhaust systems, small structures, car and other vehicles or machines mufflers are the most common components that are made from the above mentioned grade. None Nickel or its small content in the composition is associated with a ferritic structure, resulting in a relatively higher flue gas resistance.

Materials in the X2CrTi12 grade can work freely for extended periods of time at elevated temperatures of 500 - 600 ℃, which can be classified as heat resistant steel (bypassing standards). Unlike austenitic acid resistant steel, 1.4512 is not resistant to numerous salts, acids or bases.

Mechanical properties in annealed condition:

  • Tensile strength, Rm: 390 - 560 MPa
  • Yield point, Re: > 220 MPa
  • Elongation, A > 20%
  • Modulus of elasticity, E = 220 GPa
  • Heat capacity, cp20℃= 460 J * Kg-1 * K-1
  • Heat conductivity, λ = 25 W * m-1 * K-1
  • Hardness: < 180 HB

Yield point at individual work temperatures

Properties specified in the MPa Approximate properties at temperatures
100℃ 150℃ 200℃ 250℃ 300℃ 350℃
Yield point Re > 200 > 195 > 185 > 180 > 180 > 160

Other properties at elevated temperatures

Properties Temperatures
100℃ 200℃ 300℃ 400℃ 500℃
Modulus of elasticity, E (GPa) 215 210 205 195 -
Linear Expansion Factor α (10-6 * K-1) 10,5 11,0 11,5 12,0 12,0

Heat treatment process

  • Annealing at 770 - 830℃ with cooling in water or air
  • Forging and rolling at 1100 - 800℃

In the above mentioned grades the company provides:

Substitutes, equivalents and other species designations

1.4512
4512
AISI 409
UNS S40900
UNS S40910
UNS S40920
UNS S40930
SAE 51409
TP409
X2CrTi12
X6CrTi12
X 2 CrTi 12
X 6 CrTi 12
X 6 CrTi 17
X6CrTi12
X6CrTi17
X6CrTi12E
409S19
409 S 19
LW12
LW19
X7CrTi12
X 7 CrTi 12
Z3CT12
Z 3 CT 12
F12T
X5CrTi12
X 5 CrTi 12
00Cr12Ti
022Cr11Ti
06Cr11Ti
0Cr11Ti
F1-25H
F1-45
F1-60
UNS S 40900

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