Summary

Alan Henry Lawrence Mount Report on the Shrivenham train crash of 15 January 1936… (1936)

These results prove the material to be wrought iron. The proportion of phosphorus present in rather high, but not higher than is found frequently in iron having good physical properties.
Physical Tests.
Test pieces cut from the hook as close as possible to the fracture and in a direction parallel to the axis of the drawbar were tested with the following results:
A machined test piece measuring l1⁄2 in. by 3⁄4 in. by 7 in. cut from the hook in a direction parallel to the axis of the drawbar broke when bent cold through an angle of 80° over a round bar 21⁄2 in. in diameter.
Source: Wikisource

Alan Henry Lawrence Mount Report on the Shrivenham train crash of 15 January 1936… (1936)

The microscopic examination of polished and etched sections showed that the metal contained a considerable amount of slag which was present in rather large masses unevenly distributed throughout the material. The shape, mass and distribution of these slag inclusions indicated that the metal had not been subjected to sufficient forging to produce the degree of homogeneity which is desirable.
Source: Wikisource

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