Hardness Vs Wear Resistence

Yes but first you tell me that if you know what the hell En19 and En353 is then yes you know the answer.Try using them together in a test rig and you will have your answer.

As far as I know, EN19 is the BS709M40 steel similar to SAE 4140. It is a 1% typical Cr/Mo steel that can be induction hardened and often used for gears and high strength shats etc. Also suitable for higher strength application when resistance to shock is required.

The EN353 steel is the BS815M27, similar to SAE 8620 (1.5%Ni, Cr, Mo) a low carbon steel suitable for case hardening.

Normally, the selection of a steel is a function of a set of mechanical properties required by the designed part and costs involved. If your only concern is the wear resistance, you will not find significant differences between them.

hi,

There is a significant difference in wear resistence between the two.

Practically i have seen that En353 will have more wear resistence than En19

I don't know why?

regards

jk

The case hardened steels are the better option for wear resistance due to higher carbon content in the surface, which means higher hardness and more carbides. For these applications it is common to keep hardness above 55HRC (say 58/60HRC which means a longer life).

Pls, jk, confirm you have seen applications of both EN19 and EN353 at same 55HRC hardness and still have significant difference in wear resistance.

The only reason I figure that a steel like 4140 with the same hardness as an 8620 tempered by induction is not direct wear, but some related phenomena like environmental assisted corrosion, surface cracking and propagation, stress corrosion, etc.

With this line of thinking, the 8620 is much more tough and handles more deffects than a highly hardened 4XXX series steel.

ABout the wear itself... should be the same in both.

hardnees is not the exact symbol for wear resistence. we can offer you 20HRC composite coated mild steel ,more wear resistent than case hardened or induction hardened carbon steels

i want to know... what are the other factors apart from Hardness that influence wear resistance... it is a known fact that steels of same hardness show significantly different wear properties. A Martensite structure shows diff behaviour than an Austenitic one ... but talking about material properties on a macroscopic scale what are the properties apart from hardness that influence wear resistance. Also, if i have 2 steels of same hardness but different wear behaviour in dry sliding wear, what is the effect on the other sliding part in contact?? is the wear getting transferred?

Chamical reaction may be the answer.

Dear all,

i have a requirement of the wear resistance. which material i should use?

I have a rollers whose outside dia is 350mm. contacting area is at 380mm diax120mm width. it has worn. now i want to fix a sleeve of wear resistance material which can have 50-55 HRC.

the sleeve i will fix will be of size 350mm ID x 380mm OD x 30mm width. with the gear type teeths of size: 5mm pitch x 2.5mm thick x 3 mm deep. the working temperature is 160 c.

should i go to EN19 / EN353, with induction hardened or case hardened? please suggest.

thanking you for reply