Part Number WS 1.7139

Technical Data Sheet

Chemical Composition Limits
Weight % C Cr Mn Si P S Fe
EC-80 0.14-0.19 0.80-1.15 1.00-1.30 0.15-0.40 0.035 0.020-0.035 Rem
Other Chemically similar Specifications
Weight % C Cr Mn Si P S Fe
WS 1.7139 0.14-0.19 0.80-1.10 1.00-1.30 0.40 max 0.035 max 0.020-0.040 Rem
16MnCrS5 0.14-0.19 0.80-1.10 1.00-1.30 0.40 max 0.035 max 0.020-0.040 Rem
AISI 5115 0.14-0.19 0.80-1.15 1.00-1.30 0.15-0.40 max 0.035 max 0.020-0.035 Rem
16MC4 0.14-0.19 0.80-1.15 1.00-1.30 0.15- 0.40 max 0.035 max 0.020-0.035 Rem

Our EC-80 is Manufactured in Rod, Bar and coil (WS 1.7139 / AISI 5115 Case Hardening Steel). For all stock and size availability contact Sales.

Standard Stock size
From 1 to 20mm, in steps sometimes 0.1 to 0.5

Ø < 2.99 mm : high precision cold drawn and polished
Ø > 3.00mm: cold drawn, ground and polished, roughness N5-N6

Delivery form
In bars for automatic lathes of 3m (2m) lengths or in coils for ESCOMATIC machines

Standard ISO) h8, other close tolerance sizes available on request.

Tensile strength (Rm)
Standard 490-680 N/mm2

Heat Treatment
Case hardening, superficial hardening and heart hardening possible.
Hardening Temperature (heart): 850-880 ºC
Hardening Temperature (superficial): 810-840 ºC
Tempering Temperature: 170-210 ºC

Obtainable Hardeness
Approx 45 HRC depending on method used.

Cutting Rate
30 to 50 m/min (approx value, depending on the lubrication oil, the cutting tools, the shape of parts etc)

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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