Part Number WS 1.4427 So

Technical Data Sheet

Chemical Composition Limits
Weight % C Si Mn P S Cr Ni Mo Fe
CHRONIFER SPECIAL KL 0.03 max 1.00 max 2.00 max 0.045 max 0.10-0.139 16.50-18.50 12-14 2.10-2.50 Rem
Other Chemically similar Specifications
Weight % C Si Mn P S Cr Ni Mo Fe
WS 1.4427 So 0.03 max 1.00 max 2.00 max 0.045 max 0.10-0.139 16.50-18.50 12-14 2.10-2.50 Rem
AISI 316L 0.03 max 1.00 max 2.00 max 0.045 max 0.10-0.139 16.50-18.50 12-14 2.10-2.50 Rem

Chronifer Special KL is an austenitic stainless steel with high corrosion resistance which is manufactured in Rod, Bar and Coil. (AISI 316L Stainless Steel). For all stock and size availability contact Sales.

Material Properties
Type ~316L is an improved Corrosion resistant Chrome-Nickel steel alloy with high content of Molybdenum. It is a free machining grade with controlled sulfur content, used specially for watch making parts in middle and high quality watches, but also for other industries.

Corrosion resistance
Due to its superior Corrosion resistance, it has been used in handling many of the chemicals used by chemical process industries. It is more resistant to pitting Corrosion than typical 18-8 alloys. For optimum Corrosion resistance, surfaces must be free of scale and foreign particles. Parts should be passivated.

Bars: Cold drawn, ground and polished. Standard length of bars 3m. Surface roughness N6, in tolerance ISO h7 for bars and fg8 for coils.

Heat Treatment
For high corrosion resistance and low magnetism, there may be an annealing procedure necessary. This annealing is only useful after a strong cold working which raised the mechanical resistance

Annealing: Heat to 1010-1120 ºC (1850-2050ºF and water quench)

Hardening: Cannot be hardened by heat treatment hardens only by cold working

Stock Range
0.90-14mm in bars and 0.90-5mm in coils

Mechanical properties
Tensile strength: at delivery form 750-1000 N/mm2

Cutting Rate
30-50m/min (approx value depending on the lubrication oil, the cutting tools, the form parts)

At Aircraft Materials we specialise in the rapid turn-around of orders, with most stock items ready for shipping out the same day to anywhere in the world. For time-critical orders, such as AOGs use our AOG service desk (, the team are dedicated to processing and dispatching orders on the same day, even for cutting orders on bar and sheet products.

Our expertise in global logistics enables us to source material from anywhere in the world in a matter of days and provide fast shipping solutions to all our customers, whichever country they are in. We use a range of transport partners to ship overnight within the UK and Europe, and offer a full range of logistics solutions from priority express services to more cost-effective economy shipments all around the globe. 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.