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9840R

Steel availability

Round        L. Hot       1 "to 12"

Average Chemical Analysis

               C          Yes        Mn       P      S       Cr   Neither   Mo  W   V   Others  BHN / HRC

9840R     0.40-0.50     ≤ 0.25   0.80-0.90   -   ≤ 0.050   0.85  -      -   -      -      -      193-295

Heat treatment

               Temper temperature (° C)         Cooling Medium (° C)            Tempering (° C)

9840R           7800-840                        Oil                        200-650

Features and Applications

9840R

Cr-Ni-Mo steel, easy to temper for manufacturing for mechanical applications (arrows, gears, crowns, etc.); its hardenability is superior to 4140 steel and with better resistance to mechanical fatigue.

Like  medium carbon steels, precautions must be taken if it will be subjected to a welding process.

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