Part Number WS 1.4125

Technical Data Sheet

Chemical Composition Limits
Weight % C Cr Mo Si Mn S Fe
CHRONIFER M-17C 0.95-1.20 16-18 0.80 max 1.00 max 1.00 max 0.015 max Rem
Other Chemically similar Specifications
Weight % C Cr Mo Si Mn S Fe
WS 1.4125 0.95-1.20 16-18 0.80 max 1.00 max 1.00 max 0.015 max Rem
X 105 CrMo 17 0.95-1.20 16-18 0.80 max 1.00 max 1.00 max 0.015 max Rem
AISI 440C~ 0.95-1.20 16-18 0.80 max 1.00 max 1.00 max 0.015 max Rem

Chronifer M-17C is a hardenable stainless chromium steel which is manufactured in Rod, Bar and Coil. (AISI 440C ~ Stainless Steel). For all stock and size availability contact Sales.

Material Features
High carbon chromium steel designed to provide stainless properties with maximum hardness. After heat treatment type 440C attains the highest hardness of any stainless steel (about 60 HRC). This stainless steel principally has been used in bearing assemblies including bearing balls and races. In addition, it should be considered for cutlery, needle valves, ball check valves, etc.

Coil: Cold drawn and polished: 10-35kg/coil
Bars: Ø 0-1.99mm : Cold drawn and polished
Bars Ø 2.00-16mm: Cold drawn, ground and polished.

Bars Length
in 3m 92m) Surface roundness N5-N6

Standard Tolerances
Diameter h8 (h7)
Out of roundness/cylindricity: 1/2 of dia tolerance
Tolerance in length :+/- 30mm

Tensile Strength
Before heat treatment: depending on the diagram 750-950n/mm2

Heat Treatment
Hardening: 1030-1070ºC
Soft Annealing: 843-871ºC slow furnace cooling
Max obtainable hardness 60 HRC

Cutting Rate
15-25 m/min (approximate value, depending on the lubrication oil, the cutting tools, the shape of parts)

At Aircraft Materials all stock items can be shipped out within 24 hours, usually within the same day. Even cutting orders for bar or sheet can be processed and dispatched the same day, and for time-critical situations such as AOGs, we have a dedicated AOG service desk ready to help (

Thanks to our global logistics network we can source from anywhere in the world in just a few days. We use a range of transport partners to enable us to ship overnight within the U.K. and Europe and provide fast shipping solutions to the rest of the world. If your requirement is urgent we can offer a priority shipping service, but also if time is not so critical we can offer more cost-effective options to ensure you get the best value for money. To find out more about our services click here.

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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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