The industry provides documentation to reassure its customers that they will receive only some quality products. The QAP, heat treatment chart, package list, guarantee letter, lab test report, third-party test report, and material traceability report are similar documents. Testing is also done in the business to ensure that products are manufactured to a high standard without compromising their quality. The tests performed include those for positive material identification, mechanical testing, chemical testing, testing for pitting resistance, testing for hardness, testing for intergranular corrosion, etc. Therefore, no product of low quality is sent to the customer.