Stainless spring acid resistant steel X10CrNi18-8, 1.4310, AISI 301, AISI 302 with austenitic structure for springs and spring washers according to EN 10088-1, EN 10151, EN 10088-3.

 

Standards Steel Grades
Chemical Composition %
C: Mn: Si: P: S: Cr: Mo: Ni: V: Ti: Cu: W: N:
PN 1H18N9
<0.12 <2.0 <0.8 <0.045 <0.030 17.0 - 19.0 - 8.0 - 10.0 - - - - -
DIN
EN
X10CrNi18-8 - 1.4310 - 4310 - X 10 CrNi 18-8
0.05 - 0.15 <2.0 <2.0 <0.045 <0.015 16.0 - 19.0 <0.8 6.0 - 9.5 - - - - <0.11
DIN
EN
X8CrNiS18-9 - 1.4305 - 4305
<0.1 <2.0 <1.0 <0.045 0.15 - 0.35 17.0 - 19.0 - 8.0 - 10.0 - - <1.0 - <0.11
DIN
EN
X9CrNi18-8 - 1.4325
0.03 - 0.15 <2.0 <1.0 <0.045 <0.030 17.0 - 19.0 - 8.0 - 10.0 - - - - -
UNS 
AISI 
ASTM
UNS S30100 - AISI 301 - A 176 Type 301
<0.15 <2.0 <1.0 <0.045 <0.030 16.0 - 18.0 - 6.0 - 8.0 - - - - <0.10
UNS 
AISI
ASTM
UNS S30200 - AISI 302 - A 176 Type 302
<0.15 <2.0 <1.0 <0.045 <0.030 17.0 - 19.0 - 8.0 - 10.0 - - - - <0.10
JIS SUS 301 - SUS301
<0.15 <2.0 <1.0 <0.045 <0.030 16.0 - 18.0 - 6.0 - 8.0 - - - - -
JIS SUS 302 - SUS302
<0.15 <2.0 <1.0 <0.045 <0.030 17.0 - 19.0 - 8.0 - 10.0 - - - - -
GOST 12Ch18N9 - 12Kh18N9 - 12Х18Н9
<0.12 <2.0 <0.8 <0.035 <0.020 17.0 - 19.0 <0.5 8.0 - 10.0 <0.2 <0.5 <0.4 <0.2 -
BS 301 S 21 - 301S21
<0.15 <2.0 <1.0 <0.045 <0.030 16.0 - 18.0 - 6.0 - 8.0 - - - - -
UNE X10CrNi18-9 - X 10 CrNi 18-9 - F-3507
<0.12 <2.0 <1.0 <0.045 <0.030 17.0 - 19.0 - 8.0 - 10.0 - - - - <0.10

 

1.4310, X10CrNi18-8, AISI 301 - description and application

Stainless, non-magnetic spring steel with high carbon content with good ductility delivered in the form of cold rolled tapes, sheets, drawn wires and drawn bars.

Designed for springs, spring washers, ropes, flexible connectors, fasteners, aerial parts and other components used in the chemical and food industries such as pump parts, acid tanks, or high temperature springs.

1.4310 grade exhibits resistance to amorphous corrosion, but in delivered condition and in the sensitized state it is not resistant to intergranular corrosion. The steel is delivered in a soft and strengthened by cold work condition, exhibiting the following mechanical properties according to user requirements as described. Supersaturation of X10CrNi18-10 grade products is carried out at 1000-1100 ℃. Forging and rolling processes require a temperature of 1200 - 900 ℃.

For Austenitic steel 1H18N9, it is similar to X10CrNi18-10 with a slightly narrower carbon range - max 0.12%, thus showing slightly better mechanical properties than 0H18N9 steel according to PN. It is characterized by good durability, compactness, relatively low plasticity, tendency to cold-work hardening, and adequate polishing ability while maintaining resistance to compounds and substances of 0H18N9 steel.

Steel is resistant to intercrystalline corrosion if no welding, hot bending, or strengthening by cold work was performed on the product. It also exhibits resistance to compounds contained in fertilizers, nitric acid, aggressive preservatives and various salts. It is not resistant to non-oxidant environments, pitting and contact corrosion (halides), stress corrosion in contact with chlorides and hydroxides.

It is used in the food, fruit and vegetable and chemical industries in nitrogen plants for valves, parts of fittings and pumps, the coal industry and the petrochemical industry. Other applications include distillation boilers, agitators, acid tanks, heat exchangers, absorption towers, and pipelines. It shows very good weldability, where no early heating of the product is required. However, after the joining of the components, it is advisable to carry out the supersaturation process to protect the product against intercrystalline corrosion.


Mechanical and physical properties of 1.4310 according to EN 10088-1

  • Tensile strength, Rm = 500 - 700 MPa
  • Yield point, Renbsp;= > 195 MPa
  • Elongation, A > 40%
  • Modulus of elasticity,E = 200 GPa
  • Heat capacity cp = 500 J ⋅ kg-1 ⋅ K-1
  • Heat conductivity, λ = 15 W ⋅ m-1 ⋅ K-1
  • Hardness < 230 HB

 


Mechanical properties of cold rolled tapes and springs X10CrNi18-10 according to EN 10151 under certain curing conditions:

  • + C850
    • Tensile strength, Rm = 850 - 1000 MPa
    • Elongation, A >25%
  • + C1000
    • Tensile strength, Rm = 1000 - 1150 MPa
    • Elongation, A > 20%
  • + C1150
    • Tensile strength, Rm = 1150 - 1300 MPa
    • Elongation, A > 15%
  • + C1300
    • Tensile strength, Rm = 1300 - 1500 MPa
    • Elongation, A >10%
  • + C1500
    • Tensile strength, Rm = 1500 - 1700 MPa
    • Elongation, A >5%
  • + C1700
    • Tensile strength, Rm = 1700 - 1900 MPa
    • Elongation, A >2%
  • + C1900
    • Tensile strength, Rm = 1900 - 2200 MPa
    • Elongation, A >1%

 


Mechanical properties at individual working temperatures:

  • Coefficient of linear expansion α (10-6 ⋅ K-1)
    • at the temperature 100℃ = 16
    • at the temperature 200℃ = 17
    • at the temperature 300℃ = 17
    • at the temperature 400℃ = 18
    • at the temperature 500℃ = 18
  • Modulus of elasticityE (GPa)
    • at the temperature 100℃ = 194
    • at the temperature 200℃ = 186
    • at the temperature 300℃ = 179
    • at the temperature 400℃ = 172
    • at the temperature 500℃ = 165

 


Virgamet in the above grades provides:

 


Other indications and equivalents of 1H18N9 steel:

1.4310, 4310, X10CrNi18-8, X 10 CrNi 18-8, X8CrNiS18-9, 1.4305, 4305, X 8 CrNiS 18-9, UNS S30100, AISI 301, A176 Grade 301, A176 Grade 302, SUS 301, SUS 302, SUS301, SUS302, 12Ch18N9, 12Kh18N9, 12Х18Н9, X10CrNi18-9, X 10 CrNi 18-9, F-3507, X9CrNi18-8, X 9 CrNi 18-8, 1.4325, V-301, 12Cr17Ni7, 12Cr18Ni9, 1Cr18Ni9, ČSN 17241, ČSN 17 241, 301S21, 301 S 21, 301S22, 301 S 22, 302S26, 302 S 26, 302S31, 302 S 31, KO 32, J-301, SUS 302 FB, STS 301, STS 302, UNS S30200, AISI 302.


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