Exera® 5R10/2R25 medical wire Wire

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Datasheet updated

2022-05-10 07:47
(supersedes all previous editions)

Exera® 5R10 and Exera® 2R25 are austenitic chromium-nickel stainless steels. Exera® 2R25 is a low carbon version of Exera® 5R10. The grades are characterized by:

  • Good corrosion resistance
  • Excellent toughness
  • Good welding characteristics


  • ASTM: 304, 304L
  • UNS: S30400, S30403
  • EN Number: 1.4301, 1.4306
  • EN Name: X5CrNi18-10, X2CrNi19-11
  • W.Nr.: 1.4301, 1.4306
  • DIN: X5 CrNi 18 10, X2 CrNi 19 11
  • SS: 2332, 2352
  • AFNOR: Z6 CN 18 09, Z3 CN 18 10
  • BS: 304S31

Product standards

  • ASTM F899
  • ISO 16061


These grades are mainly used for surgical instruments and dental tools.

Chemical composition (nominal) %

C Si Mn Cr Ni
Exera® 5R10 ≤0.07 ≤0.75 ≤2.0 18.5 9
Exera® 2R25 ≤0.03 ≤0.7 ≤1.5 18.5 10

Forms of supply

Wire form

  • In coils with weights up to 150 kg
  • On various types of spool with wire weights up to 500 kg
  • In straightened lengths up to 4 m

Surface finishes and size range

Surface finishSize range, mm
Coated 0.20 - 8.00
Bright 0.11 - 0.80
Mechanically polished 0.40 - 6.00

Mechanical properties

Typical mechanical properties for Exera® 5R10 and Exera® 2R25 at 20°C.

Grade Tensile strength Rm Proof strength Rp0.2 Elongation Hardness
Exera® 5R10 ≥515 ≥205 ≥40 ≤92 ≤201
Exera® 2R25 ≥485 ≥170 ≥40 ≤92 ≤201

Physical properties

Typical physical properties for annealed Exera® 5R10 and Exera® 2R25 are given below :

Grade Density Elastic Moduls Mean Coefficient of Thermal Expansion Thermal Conductivity Specific Heat Resistivity
g/cm3 103 MPa mm/m/°C W/m °C J/kg °C μΩm
0-100 °C at 100 °C 0-100 °C 20 °C
Exera® 5R10/2R25 8 193 17 16 500 0.72

Corrosion resistance

Excellent corrosion resistance in a wide range of atmospheric environments and various corrosive media.

Subject to pitting and crevice corrosion in warm chloride media and to stress corrosion cracking at temperatures above 60°C.

Considered resistant to potable water with up to approximately 200mg/l chlorides, at ambient temperatures, reducing to approximately 150 mg/l, at 60°C.

Disclaimer: Alleima is not providing any products or services that are intended or may be construed to be recommending or otherwise advising on, in any manner, the design, suitability, appropriateness or effectiveness, from a medical/biological/safety perspective, of any medical material, instrument and/or medical device.