4150 HR Annealed Steel
Chemical Composition
Carbon:                 0.48%-0.53%
Manganese:            0.75%-1.00%
Chromium:              0.80%-1.10%
Silicon:                   0.15%-0.30%
Molybdenum:           0.15%-0.25%
Sulfur:                    0.04%
Phosphorous:           0.035%
Tensile Strength:           106,000 PSI
Yield Strength:              55,100 PSI
Elongation:                   20.2% 

*These numbers are "Typical" properties and may not be required to meet this grade. Please check with your Alro Sales Representative if physical properties are required for your application.*
Typical Uses
Typical applications for 4150 include:
  • Shafts
  • Aircraft Parts
  • Drill Collars
  • Bolts
  • Couplings
  • Valves
  • Sprockets
  • Axles

4150 Hot Rolled Annealed Steel

Alro stocks 4150 Hot Rolled Annealed Steel - a part of the SAE (Society of Automotive Engineers) family of steel grades. 4150 round bar is a higher carbon variation of the chromium, manganese, molybdenum 4100 series of low alloy steels. It is considered a low alloy steel because its percentage of metals is low in proportion to its main component, iron. 4150 is noted for increased hardenabilty. It may be selected when slightly higher mechanical properties are required. Machinabilty of 4150 round bar is better in the annealed or normalized condition.  It is ideal to machine in the annealed form and then heat treat it to harden the steel; as heat treatment can make it very hard and difficult to work. On this Q&T product, tempering has been done to restore some of the ductility after heat treatment and quench.

Alro also stocks:
AISI 4150R Q&T SR Hot Rolled, a free-machining alloy steel
4150 Dybar (MOD) RS Hot Rolled