Specifications

1.4140 steel
1.4140/1.7225/4340/1.6582
2.hot rolled,annealing or pre-hardened
3.steel sheet or round bar
4.black surface

 

1.4140 steel

• 4140/1.7225 Alloy Steel is a chromium/molybdenum medium-carbon steel.
• 4140/1.7225 Alloy Steeloffers medium to high hardenability and good fatigue properties.
• 4140/1.7225 Alloy Steel has a machinability rating of 50% to 55% of a 1212 carbon steel.
• 4140/1.7225 Alloy Steelis sold in the annealed condition. Typical annealed hardness is BHN 217/229 Rc 17/18. Or in the pre-hardened condition BHN 262/321 Rc 26.6/34.3 with a higher surface hardness and lower center hardness.
• 4140/1.7225 Alloy Steelis capable of meeting ASTM-A322.
• Typical Applications:

Base Plates      

Tool Holders    

Molds        

Support Plates                  

Fixtures                     

Punch Holders      

• Chemical Composition:

Carbon: 0.38~0.45%

Silicon: 0.17~0.37%

Manganese: 0.50~0.80%

Chromium: 0.90~1.20%

Molybdenum: 0.15~0.25%