Stainless steel 1.4057, X17CrNi16-2 1.4044, Z15CN17-03 intended for responsible parts of machines and devices according to EN 10088-1, AIR 9160/C, ASNA 3138, ASNA 3299, ASNA 3126.

 

Standard Steel Grade
Chemical Composition %
C: Mn: Si: P: S: Cr: Ni:
PN H17N2
0.11 - 0.17 <0.8 <0.8 <0.040 <0.030 16.0 - 18.0 1.5 - 2.5
PN H17N2A
0.11 - 0.17 <0.8 <0.8 <0.035 <0.020 16.0 - 18.0 1.5 - 2.5
PN 2H17N2
0.17 - 0.25 <0.8 <0.8 <0.040 <0.030 16.0 - 18.0 1.5 - 2.5
EN X17CrNi16-2 - X 17 CrNi 16-2 - 1.4057
0.12 - 0.22 <1.5 <1.0 <0.040 <0.030 15.0 - 17.0 1.5 - 2.5
LW 1.4044
0.12 - 0.20 <1.0 <1.0 <0.035 <0.025 15.0 - 18.0 2.0 - 3.0
EN X19CrNi17-2 - X 19 CrNi 17-2
0.14 - 0.23 <1.0 <1.0 <0.040 <0.015 15.5 - 17.5 1.5 - 2.5
ASTM AISI 431 - UNS S43100
<0.20 <1.0 <1.0 <0.040 <0.030 15.0 - 17.0 1.25 - 2.5
AIR 9160 Z15CN17-03 - Z 15 CN 17-03 - Z15CN17.03
0.16 - - - - 16.5 2.4
AF Z15CN16-02 - Z 15 CN 16-02
0.15 - 0.20 <1.0 <1.0 <0.040 <0.025 15.5 - 17.0 1.5 - 2.5

 

X17CrNi16-2, 1.4057, 1.4044 - specification and application

H17N2A, 2H17N2A and other equivalents are martensitic stainless steels intended for heat treatment showing high mechanical properties and, at the same time, very good corrosion resistance.

In contrast to steels containing ~13% of Chromium (0H13-4H13) - 2H17N2 retains much better corrosion resistance due to the small amount of nickel addition and the increased content of chromium in the composition.

Steel is most often supplied in the form of peeled bars, forged bars, hexagonal bars and even in the form of sheets. Depending on the type of substitute, the hardness that can be obtained on a thermally improved material can sometimes amount to 45 HRC. Some grades, e.g. X17CrNi16-2 / 1.4057, are delivered in heat treated condition +QT800 or +QT900.

The grades described above are used, among others, in the aerospace, marine, food, nitrogen, paper and food industries for particularly loaded parts of pumps, the production of screws, nuts, parts of valves of installations, shafts, sleeves or spindles. H17N2A steel is a special grade used for the manufacture of aircraft parts.

2H17N2A steel shows resistance to nitric acid, phosphoric acid, low concentrations of formic and acetic acids, sea water, and most nitrates.

In addition, the grades do not belong to the group suitable for welding - in the situation of joining materials, additional thermal improvement is recommended in order to maintain adequate resistance to intergranular corrosion.


Mechanical properties of X17CrNi16-2, 1.4057:

  • Delivery condition + A
    • +1C, +1E, +1D, +1X, +1G, +2D
      • Tensile strength, Rm <950 MPa
      • Hardness, HB: <295
    • +2H, +2B, +2G +2P smooth bars
      • Dimensions <16mm
        • Tensile strength, Rm <1050 MPa
        • Hardness, HB: <330
      • Dimensions 16-40mm
        • Tensile strength, Rm <1000 MPa
        • Hardness, HB: <310
      • Dimensions >40mm
        • Tensile strength, Rm <950 MPa
        • Hardness, HB: <295
  • Delivery condition +QT800
    • +1C, +1E, +1D, +1X, +1G, +2D
      • Tensile strength, Rm: 800 - 950 MPa
      • The yield point, Re >600 MPa
      • Elongation for dimensions <60mm, A: >14%
      • Impact resistance for dimensions <60mm, KV: >25 J
      • Elongation for for dimensions >60mm, A: >12%
      • Impact resistance for dimensions >60mm, KV: >20 J
    • +2H, +2B, +2G +2P smooth bars
      • Dimensions <10mm
        • Tensile strength, Rm: 850 - 1100 MPa
        • The yield point, Re >750 MPa
      • Dimensions 10-16mm
        • Tensile strength, Rm: 850 - 1100 MPa
        • The yield point, Re >700 MPa
        • Elongation, A:> 7%
      • Dimensions 16-40mm
        • Tensile strength, Rm: 800 - 1050 MPa
        • The yield point, Re >650 MPa
        • Elongation, A:> 9%
        • Impact resistance, KV: > 25J
      • Dimensions 40-63mm
        • Tensile strength, Rm: 800 - 1000 MPa
        • The yield point, Re >650 MPa
        • Elongation, A:> 12%
        • Impact resistance, KV: > 25J
      • Dimensions >63mm
        • Tensile strength, Rm: 800 - 950 MPa
        • The yield point, Re >650 MPa
        • Elongation, A:> 12%
        • Impact resistance, KV: > 16J
  • Delivery condition +QT900
    • +1C, +1E, +1D, +1X, +1G, +2D
      • Tensile strength, Rm: 900 - 1050 MPa
      • The yield point, Re >700 MPa
      • Elongation for dimensions <60mm, A: >12%
      • Impact resistance for dimensions <60mm, KV: >16 J
      • Elongation for for dimensions >60mm, A: >10%
      • Impact resistance for dimensions >60mm, KV: >15 J

 

Delivery condition Mechanical properties Temperature
100℃ 150℃ 200℃ 250℃ 300℃ 350℃ 400℃
+QT800 The yield point, Re (MPa) >515 >495 >475 >460 >440 >405 >355
+QT900 The yield point, Re (MPa) >565 >525 >505 >490 >470 >430 >375

 


General mechanical properties of 2H17N2 steel:

  • Tensile strength, Rm: >880 MPa
  • The yield point, Re: > 690 MPa
  • Elongation, A:> 12%
  • Hardness, HB: <248

 


General mechanical of H17N2A / H17N2 steel:

  • Tensile strength, Rm: >830 MPa
  • The yield point, Re: > 640 MPa
  • Elongation, A:> 14%
  • Hardness HB: 235 - 286

 


Heat and plastic processes of the grades:

  • Heat and plastic treatment of 1.4057, X17CrNi16-2
    • Rolling and forging at 1100 °C with slow cooling
    • Delivery condition + A
      • Annealing at 680 °C with cooling in the air
    • Delivery condition +QT800
      • Hardening at 950 - 1050 ℃ with cooling in water or oil
      • Tempering at 750 - 800℃ with repeated tempering at a temperature of 650 - 700℃
      • One-time tempering at a temperature of 620 - 720 ℃ in the case when the concentration of Nickel in the chemical composition is in the low range
    • Delivery condition +QT900
      • Hardening at 950 - 1050 ℃ with cooling in water or oil
      • Tempering at a tempering of 600 - 650℃
  • Heat and plastic treatment of H17N2A / H17N2
    • Rolling and forging at 1150 -900 °C for H17N2A, for H17N2 at a temperature of 1050 - 900℃
    • Softening annealing
      • Annealing at 620 °C with cooling in the furnace for H660N17 and H2N17A
    • Heat treatment
      • Hardening at 950 - 975℃ for H17N2A, 975 - 1040℃ for H17N2 with cooling in oil
      • Tempering at 275 - 300℃ for H17N2A, for H2N17 in 275 - 350℃ in air
  • Heat and plastic treatment of 2H17N2
    • Rolling and forging at a temperature of 1150 - 900 ℃
    • Softening annealing
      • Annealing at 620 - 660℃ with cooling in the furnace
    • Heat treatment
      • Hardening at 1070 - 1100℃ with cooling in oil
      • Tempering at 650-740 ℃ with cooling in the air

 


In the above mentioned grades the company provides:

 


Other indications of grades and substitutes:

H17N2A, H17N2, 2H17N2, 1.4057, AISI 431, UNS S43100, X17CrNi16-2, X 17 CrNi 16-2, X22CrNi17, X14CrNi172, X20CrNi17-2, 431S29, X16CrNi16, 1Ch17N2, 14Ch17N2, 14Х17Н2, 1.4044 S80, Aeralloy 431-C, X19CrNi17-2, Z15CN16-02, Z15CN17.03, Z15CN17-03, AMS 5628, SUS 431, 20Ch17N2, 20Х17Н2


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