Free Machining Steels: Tin Data Sheet

 
MECHANICAL PROPERTIES
GRADE 12T14 1215 12L14 12L14(Te/Se)
Tensile Strength 70/90,000 psi. 70/90,000 psi. 70/90,000 psi. 70/90,000 psi.
Yield Strength 60/80,000 psi. 60/80,000 psi. 60/80,000 psi. 60/80,000 psi.
Elongation (in 2") 10 to 18% 10 to 18% 10 to 18% 10 to 18%
Reduction Of Area 35 to 55% 35 to 55% 35 to 55% 35 to 55%
Hardness Rb 75 to 90 75 to 90 75 to 90 75 to 90
Brinell Hardness 137 to 183 137 to 183 137 to 183 137 to 183
         
SURFACE RATING (TYPICAL) 50 RMS 50 RMS 50 RMS 50 RMS
(profilometer reading)        
         
MACHINABILITY RATING*        
         
% Rating** 297 136 195 250
Surface feet/minute** 500 228 325 420
         
COEF. OF THERMAL EXPANSION        
(@212 - 1112 ° F) 16.0 x 10-6 16.1 x 10 -6 15.6 x 10 -6 N/A

* Machinability ratings are based on Grade 1212 = 100% and 168 SFM

** Approximate values only - not to be used for specifications
HEAT CHEMICAL RANGES & LIMITS (%)
GRADE 12T14 1215 12L14 12L14(Te/Se)
Carbon 0.15 max 0.09 max 0.15 max 0.15 max
Manganese 0.85/1.15 0.75/1.05 0.85/1.15 0.85/1.15
Phosphorus 0.04/0.09 0.04/0.09 0.04/0.09 0.04/0.09
Sulfur 0.26/0.35 0.26/0.35 0.26/0.35 0.26/0.35
Lead     0.15/0.35 0.15/0.35
Tellurium       0.04 typical
Selenium       0.05 typical
Tin 0.04/0.08      

Note: The Composition and Technology of 12T14 is Patented.

Note: 12T14 is SAE Certified as a Potential Standard Grade (PS-68) Listed in SAE Standard J1081.