Material 1.6657

Case hardening steel

1.6657 is a nickel-chromium-molybdenum alloyed case-hardening steel developed for the aerospace industry.
Due to its excellent properties, it is now also used in
used in other industries.
The density of 14NiCrMo13-4 is 7.85.

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1.6657

Standards

HDIN / EN US-Standard AFNOR UNI JIS request
14NiCrMo13-4 AISI 9310 UNS G931000 UNS G93106 SAE 9310 15NiCrMo13 16NiCrMo12 request

Material Category: Case hardening steel

Applications

1.6657 is often used for turbines and engine parts.

Heat Treatment

Soft annealing at 620 - 650 C°, slow controlled furnace cooling at 10 to 20 C° per hour
until approx. 600 C° are reached, after which further cooling takes place in the air.

Hardening and tempering at 150 - 200 C°, cooling in air.

Chemical Composition

C % Si % Mn % P % S % Cr % Mo % Ni %
0,11 - 0,17 max 0,40 0,30 - 0,60 max 0,025 max 0,035 0,80 - 1,10 0,20 - 0,30 3,00 - 3,50

 

Product Specifications

AISI 9310
AMS 6260
AMS 6265
AMS 6267

Mechanical Properties

Stabstahl
behandelt auf Härtespanne Härte [HB 30]
<= 150 mm 187 - 241 HB 30
behandelt auf Ferrit-Perlit Gefüge und Härtespanne   Härte [HB 30]
<= 60 mm 166 - 217 HB 30
weichgeglüht Härte [HB 30] <= 241 HB 30
nach Einsatzhärtung, im Kern Zugfestigkeit (Rm) Bruchdehnung (A5, 65)
<= 11 mm 1.130 - 1.430 N/mm² >= 9 %
<= 30 mm 1.030 - 1.330 N/mm² >= 10 %
<= 63 mm 880 - 1.180 N/mm² >= 11 %

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