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ASTM51200 Bearing Steel

ASTM51200 Bearing Steel

ASTM51200 Bearing Steel
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ASTM51200 Bearing Steel



Material Name


Material Name: 51200 Bearing Steel
Execution standard: ASTM A295-98

Characteristics and scope of application


The comprehensive performance is good, after hardening and tempering, the hardness is high and uniform, the wear resistance performance is good and contact fatigue strength is high, the machinability of steel is good, and there is good machinability after the annealing, suitable for the production of wall thickness is less than or equal to 12 mm, all bearing ring outer diameter is equal to or less than 250mm, ball diameter is less than or equal to 50mm, cone, and all size of spherical roller diameter is less than or equal to 22mm needle, can also used in the manufacture of measuring, tooling, wood-working tools.


Chemical Composition 


C Si Mn S P Cr Ni Cu Mo Al
0.93～1.05 0.15～0.35 0.25～0.45 Below 0.015 Below 0.025
 1.35~1.60  Below 0.25 Below 0.30  Below 0.10
  Below 0.050

 Mechanical Property


Tensile strength
σb (MPa) 		ballistic work
Akv (J) 		Hardness specimen size 
1617
Above 28
 61-64HRC
 A sample


specification of heat treatment and metallurgical structure

 
Specification of heat treatment : 850~860 ℃ hardening, oil cooling; 160 ℃ tempering 2h
Metallurgical Structure: tempered martensite 

Delivery State


Delivery in eight state: Hot rolled (forging) annealing, unannealed, annealing skinned steel, cold drawing (rolling) round steel, polished round steel, hot-rolled steel pipe, annealing skinned steel tube, cold drawn steel pipe (rolling)