Trinity Operating Procedures - TOPs

TOP-HARDT: Hardness Testing

Rev: 02/18/2022

Scope: This procedure covers the Hardness Daily Validation checking of product hardness (Brinell or Rockwell) both by heat treaters and in our own plant.

Procedure:

Preparing for the Day

Procedure:

Preparing for heat Treat Validation, Production Testing or Random Testing

STEP	WHO	WHEN	INFO TO USE	WHAT TO DO
1	Post Forge Leadman; QC Inspector	Random testing is performed or requested by QA Manager	Router	Random testing per QA Instructions.
1a	Post Forge Leadman; QC Inspector	Validate all prior steps for job complete on Router; Post Forge Supervisor's instructions to do a random hardness test	Router; QC Print	Use QC Print to determine where to take test; if test is not on QC Print, contact the Forging Engineer.
2	Heat Treat supplier	Receipt of parts and Heat Treat Purchase Order	Heat Treat Purchase Order	After parts are Heat Treated perform validation hardness testing according to instructions on Heat Treat Purchase Order; record results.
2a	Heat Treat supplier	If parts cannot be brought within specification	Heat Treat Purchase Order; own testing	Contact QA Manager for waiver; if achieve waiver, return parts with certifications notes as to waiver.
2b	QA Manager or Post Forge Supervisor	Upon receiving call from Heat Treater seeking waiver	Heat Treater conversation; Router with customer specifications; possibly conversation with customer	Evaluate Heat Treater's request for waiver; if waiver is within customer requirements (or if customer provides waiver), give Heat Treater written waiver (letter or email), place copy of waiver in Customer PO File and document waiver in Job Order information.
3a	Shipping Leadman; Shipping Clerk	Return of parts and paperwork	Heat Treater's certifications	Review Heat Treater's certification and verify hardness information.
3b	Shipping Leadman; Shipping Clerk	A hardness problem	Heat Treat Purchase Order; Heat Treater's certifications; Traveler	Inform QA Manager of hardness problem.
3c	Shipping Leadman; Shipping Clerk	After Heat Treat results received	Heat Treater's certifications	Send Heat Treater;s certification to QA Assistant.
4	QA Assistant	Heat Treater's certifications	Heat Treater's certifications	Enter heat treat results in M2M; scan into Parts Certs Directory

NOTE: Trinity Forge has three different types of hardness testers:

1. Brinell tester w/10mm tungsten ball: Indention is made into prepared surface of sample and measured with one of two Brinell scopes available per ASTM E10.
2. Rockwell tester: Capable of testing on B & C scale with 1/64" ball and 130 degree diamond cone penetrators respectively per ASTM E18.
3. Portable impact tester: Capable of conversion to Rc, Rb, and Brinell scales per ASTM E110.

Revision history: