instrument and implant grade metal alloys

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Stainless Steel 630 / 17-4PH (1.4542) Medical Alloy

17-4PH (1.4542) is a precipitation-hardenable stainless steel. There are various heat treatment processes available to 17-4PH and, depending on the process used, a maximum hardness of 44HRC can be achieved. It combines high strength and toughness with excellent corrosion resistance and good machinability.

Material can be certified to ASTM F899 making it suitable for a wide range of surgical instruments, cutting tools, rasps, medical screwdrivers and dental instruments such as burs. It is suitable for both polishing and magetising and shows good weldability with all electric welding methods.

Heat Treatment

Solution Heat Treatment : 1900 ̊F (+/-25 ̊F) followed by water, oil or air cool (time comensurate with the size of the part)

Precipitation Treatment : Temperature 900 - 1150̊F (depending on the H temper required), holding for 4 hours, followed by air cool

Typical Chemical Composition

C Si Mn P S Cr Mo Ni Nb Cu Fe
Min 15.00 3.00 3.00
Max 0.07 0.07 1.50 0.040 0.015 17.00 0.60 5.00 0.45 (5xC) 5.00 Balance

Typical Mechanical Properties

Heat Treatment
Tensile Strength
MPA (min)
Yield Strength
MPA (min)
% in 2D (min)
of area% (min)
HRC (min)
H1150 930 725 16 50 28
H1100 965 795 14 45 31
H1075 1000 860 13 45 32
H1025 1070 1000 12 45 35
H925 1170 1070 10 44 38
H900 1310 1170 10 40 40
Sol Treated 38 (max)


EN / DIN X5CrNiCuNb 16-4
AISI 630
UNS S17400


Stainless Steel 630 / 17-4PH (1.4542) is readily available in precision ground bar and wire starting from 1.00mm diameter up to 50mm.

Disclaimer : Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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NOTE: Weights calculated are theoretical. Manufacturing tolerances should be allowed for and results adjusted accordingly.