Revenues from Contracts with Customers (Tables)

6 Months Ended

Mar. 31, 2019

Revenues from Contracts with Customers

Schedule of disaggregation of revenue

	Three Months Ended				Six Months Ended
	March 31,				March 31,
	2018		2019		2018		2019
Net revenues (dollars in thousands)
Aerospace	$	59,033	$	68,858	$	105,872	$	123,465
Chemical processing		21,148		21,761		34,504		40,681
Industrial gas turbine		11,755		13,685		25,176		27,768
Other markets		12,724		16,958		21,962		31,243
Total product revenue		104,660		121,262		187,514		223,157
Other revenue		5,546		6,212		12,385		11,386
Net revenues	$	110,206	$	127,474	$	199,899	$	234,543