STAINLESS SUPER DUPLEX STEEL X2CRNIMOCUN25-6-3, 1.4507, UNS S32550, A182 GRADE F61 WITH TWO-PHASE STRUCTURE FOR CHEMICAL INDUSTRY ACCORDING TO EN 10088-1.

STAINLESS SUPER DUPLEX STEEL X2CRNIMOCUN25-6-3, 1.4507, UNS S32550, A182 GRADE F61 WITH TWO-PHASE STRUCTURE FOR CHEMICAL INDUSTRY ACCORDING TO EN 10088-1.

 

Standard Steel Grade
Chemical Composition %
C: Mn: Si: P: S: Cr: Mo: Ni: Cu: N:
EN 1.4507 – X2CrNiMoCuN25-6-3
<0.03 <2.0 <0.7 <0.035 <0.015 24.0 – 26.0 3.0 – 4.0 6.0 – 8.0 1.0 – 2.5 0.20 – 0.30
ASTM UNS S32550 – A182 grade F61 – Type 255
<0.04 <1.5 <1.0 <0.040 <0.030 24.0 – 27.0 2.9 – 3.9 4.5 – 6.5 1.5 – 2.5 0.10 – 0.25
ASTM UNS S32520 – A182 grade F59
<0.03 <1.5 <0.8 <0.035 <0.020 24.0 – 26.0 3.0 – 5.0 5.5 – 8.0 0.5 – 3.0 0.20 – 0.35
JIS SUS329J4L – SUS 329J4L
<0.03 <1.5 <1.0 <0.040 <0.030 24.0 – 26.0 2.5 – 3.5 5.5 – 7.5 - 0.08 – 0.30

 

1.4507, X2CrNiMoCuN25-6-3, UNS S32550, Grade F61 – specification and application

Special grade from the group of super-strong acid-resistant stainless steels similar to 1.4410 / X2CrNiMoN25-7-4 / UNS S32750. The steel exhibits high strength properties with relatively high resistance to various types of corrosion, including intergranular corrosion. 1.4507 and UNS S32550 materials are used in the paper, chemical, nitrogen, and aviation industries as well as in power engineering for screws, shafts, sleeves, fittings, installations and pipelines, pump parts, tanks for chemicals, heat exchangers, radiator parts and aircraft constructions .

1.4507, X2CrNiMoCuN25-6-3, UNS S32550 – mechanical properties

  • Tensile strength, Rm: 700 – 900 MPa
  • The yield point, Rp0,2: >500 MPa
  • Elongation, A:> 25%
  • Modulus of elasticity, E: 200 GPa
  • Hardness, HB: <270
  • Thermal capacity, cp: 500 J * kg-1 * K-1
  • Thermal conductivity, λ: 15 W * m-1 * K-1
  • Linear expansion coefficient, α: 13.0 * 10-6 K-1
  • Specific resistance, Ω: 0.8 mkOhm * m

 

Mechanical properties at elevated temperature – 1.4507, X2CrNiMoCuN25-6-3, UNS S32550

Temperature (℃) 100 150 200 250 300
Linear expansion coefficient, α (* 10-6 K-1) 13.0 - 13.5 - 14.0
Modulus of elasticity, E (GPa) 194 - 186 - 180
The yield point, Rp0,2 (MPa) >450 >420 >400 >380 -

 

Heat and plastic treatment 1.4507, UNS S32550

  • Supersaturation at 1020 – 1100 ℃
  • Rolling and forging at a temperature of 1200 – 900 ℃