UGIPURE® 4472 – Premium Solution‑Annealed Nitrogen‑Alloyed Stainless Steel for Surgical Implants

UGIPURE® 4472 is a nitrogen alloyed austenitic stainless steel with high corrosion resistance. Remelted by ESR process, this grade is perfectly biocompatible with human tissus and is non magnetic. Due to it’s chemical analysis, UGIPURE® 4472 shows a very high ability to cold drawing and so, it can achieve higher mechanical properties than 1.4441 (UNS S31673). This grade is usually used for high performance surgical implants, like thin bones screws, high mobility hip prosthesis, etc.

Microcleanliness:

Inclusion type	Sulphides A	Alumina B	Silicates C	Globular oxides D
Fine	≤1.5	≤2	≤2	≤2.5
Thick	≤1.5	≤1.5	≤1.5	≤1.5

Properties

General

Property	Value
Density	7.9 g/cm³

Mechanical

Property	Value	Comment
Elastic modulus	195 GPa
Elongation	35 %	min.
Tensile strength	740 MPa	min.

Thermal

Property	Value	Comment
Coefficient of thermal expansion	0.0000166 1/K	20 to 200°C
Thermal conductivity	14 W/(m·K)

Magnetic

Property	Value	Comment
Relative magnetic permeability	1.01 [-]	max.

Chemical properties

Property	Value	Comment
Carbon	0.08	max.
Chromium	19.5 - 22.0 %
Copper	0.25	max.
Manganese	2.0 - 4.25 %
Molybdenum	2.0 - 3.0 %
Nickel	9.0 - 11.0 %
Niobium	0.25 - 0.8 %
Nitrogen	0.25 - 0.5 %
Phosphorus	0.025	max.
Silicon	0.75	max.
Sulfur	0.01	max.

Technological properties

Property
Application areas	This grade is usually used for high performance surgical implants, like thin bones screws, high mobility hip prosthesis.
Cold Forming	This grade has a high ability for cold drawing which means that it is possible to obtain with a wire hard drawn ( dia 8 mm max), a tensile running from 1000 MPa up to 1800 MPa depending on the requirements of the customer.

Property

Application areas

This grade is usually used for high performance surgical implants, like thin bones screws, high mobility hip prosthesis.

Cold Forming

This grade has a high ability for cold drawing which means that it is possible to obtain with a wire hard drawn ( dia 8 mm max), a tensile running from 1000 MPa up to 1800 MPa depending on the requirements of the customer.

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Metal