114 DEPARTMENT BULLETIN 1216, U. S. DEPT. OF AGRICULTURE 
7. The tension test specimen shown in Figure 51 is recommended for general 
use in testing metals. 3 * The gauge length for measuring elongation after 
fracture is 2 inches. 
Radius 
not less 
than±" 
t^ 
i" 
8 
Parallel Sect/on 
— H\ 
—K 
■0.0/ 
-t 
K — 
iiaoi 
m j k.... Gage Length 2" Gage Length 2"- -^ 
K-S^k"i "M* Parallel Section 
k -. 4%"overall 
5 "over all ■ 
- 1? 
f 
Thread 
Fig. 52. 
(a) (6) 
(a) Specimen with shouldered ends; (6) specimen with threaded ends 
i- 4 Steel Bait 
i ° 
\— Hardened 
Steel Plug 
•-■■■Machined at 
the Same 
Setting 
Fig. 50. — The gripping device is shown as used with threaded end specimens. A 
similar device fitted with split sockets would be used with shouldered specimens 
8. When it is necessary to cut specimens from material (other than plate, 
shape, and flat material) which is of such size that the specimen shown in 
Figure 51 can not be used, it is recommended that a specimen with dimensions 
5s Attention is called to section 10. 
