ASTM A48 tensile test for castings covers gray iron castings intended for general engineering use where tensile strength is a major consideration. Castings specified under the ASTM A48 tensile test are classified on the basis of the tensile strength of the iron in separately cast test bars. The surface of the casting shall be free of adhering sand, scale, cracks, and hot tears, as determined by visual examination and the ASTM A48 standard.
Castings produced to the ASTM A48 specification are graded on the basis of minimum tensile strength obtained in special test coupons designed to standardize cooling rate. The tensile strength developed in certain casting sections may vary from test coupon values. The test bars are designated into categories according to the thickness of its controlling wall section. ASTM A48 specifies for the casting to be subjected to a tension test to determine its tensile strength. The ASTM A48 specification for castings subordinates chemical composition to tensile strength.
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Recommended Test Machine
Force range of 5 kN to 600 kN (1,125 lbf to 135,000 lbf)
Adjustable test space
The most popular choice for static tension and compression tests
These dual column testers are available in both tabletop and floor standing models
Force range of 300 kN to 2,000 kN (67,500 lbf to 450,000 lbf)
The best choice for performing static tension and/or compression applications when force capacities of 300 kN (67,000 lbf) or more are needed
Includes its own grips
Recommended Testing Accessories
Load ratings from 25 kN to 500 kN (5,625 lbf to 112,500 lbf)
Jaws move laterally in stationary position while grip body moves on adjustment
Works well with round or flat specimens
Load ratings from 100 kN to 500 kN (22,500 lbf to 112,500 lbf)
Best for higher force requirements
Measures displacement for axial tensile, compression, and cyclic testing
Gage lengths from 10 mm to 50 mm (0.5 in to 2.0 in)
Measuring ranges from 5% to 100% strain
Lightweight and self-supporting
