Stressproof® Specifications

Stressproof®

ASTM A311

Stressproof®

Mechanical

Property Tests

1 tension test every 50,000 lbs. or less of the same lot for:

Tensile, Yield, Elongation/2″, R/A

1 tension test every 10,000 lbs. or less of the same lot for:

Tensile, Yield, Elongation/2″, RA

If Restraightened, then same tests are required again.

Seam Depth

Specification

No Specifications

Maximum seam depth of 0.010 to 5/8″ diameter. Thereafter, 0.001 per each 1/16″ diameter

(1″ dia. -0.016″ max. depth)

Seams deeper are rejectable. This specification is 33% less than standard for AISI 1144 grade.

Magnetic

Testing

No Specifications

Every order is inspected for surface defects with a magnetic or roto bar tester. Seems deeper than stated above are rejected.

Warpage

Testing

No Specifications

One warpage test is taken from the first bar produced by a new or reground specialty designed drawing die.

If this test indicates stresses are out of specification, the die is not used.

Drawing Die

Testing

No Specifications

An optical comparator test is made from a mold of each new or reground die, measuring the internal geometry of the die.

Routine warpage tests are also conducted throughout the life of the die.