309.1 - Impact Standards: Charpy V-Notch Specimens

These SRMs are test specimens intended primarily for the verification of Charpy testing machines. The dimensions of these SRMs comply with the current ASTM Standard E23 and the current ISO 148-1 Standard.

SRMs 2092, 2096, and 2098 are NIST-Verification Charpy V-notch specimens that have a post-test evaluation service and proficiency test data available with them. SRMs 2092 and 2096 are to be tested at -40 °C; SRM 2098 is to be tested at room temperature (21 °C).  These SRMs should be impact tested (broken) consectively in the same time frame (i.e., not on separate days).  A completed questionnaire and digital pictures of the broken samples should be then emailed to NIST Boulder for evaluation.  An acceptable machine will produce an average value within 1.4 J or 5 % of the certified energy value, whichever is greater.

SRMs 2093, 2097, and 2099 are Self-Verification Charpy V-notch specimens that do not have any post-test services available with them. These SRMs provide a lower cost option for the Self-Service user. SRMs 2093 and 2097 are to be tested at -40 °C. These SRMs are not returned to NIST Boulder for evaluation.

SRMs 2112 and 2113 are NIST-Verification Charpy V-notch specimens that are certified for absorbed energy at -40 °C and room temperature and for maximum force at room temperature. These SRMs provide a means to verify the performance of both the energy and force scales of an instrumented

Charpy impact machine at room temperature (21 °C). They can also be used to verify just the energy scale of a machine at -40° C, interchangeably with SRMs 2092 and 2096. An acceptable machine will produce an average value within 1.4 J or 5 % of the certified energy value, whichever is greater. Currently, specific requirements are not available to verify the performance of the force scale for a Charpy test machine.

SRMs 2216, 2218, and 2219 are intended for the verification of maximum force and absorbed energy values measured at room temperature using a small-scale Charpy impact machine, in accordance with the current standards ASTM E2248 or ISO 14556. Each SRM unit consists of a set of three KLST-type specimens needed to perform a single verification.

SRMs 2237, 2238, and 2239 are intended for the verification of absorbed energy values measured at room temperature using a small-scale Charpy impact machine, in accordance with the current standards ASTM E2248 or ISO 14556. Each SRM unit consists of a set of five Reduced Half-Size (RHS)-type specimens needed to perform a single verification.

PLEASE NOTE: The tables are presented to facilitate comparisons among a family of materials to help customers select the best SRM for their needs. For specific values and uncertainties, the certificate is the only official source.

- Certified values are normal font
- Non-certified or reference values are italicized
- Non-certified values in parentheses are for information only

- Detail    - Certificate    - Report of Investigation    - MSDS    - Data Files    - Questionnaire

					Typical Absorbed Energy Range
	SRM	Description	Unit of Issue		(J)
	2092 Now Selling	Low-Energy Charpy V-Notch Specimens (NIST-Verification, 8 mm Striker)	set		13 to 20
	2093 Now Selling	Low-Energy Charpy V-Notch Specimens (Self-Verification,  8-mm Striker)	set		13 to 20
	2096 Now Selling	High-Energy Charpy V-Notch Specimens (NIST-Verification, 8 mm-Striker)	set		90 to 140
	2097 Now Selling	High-Energy Charpy V-Notch Specimens (Self-Verification,  8-mm Striker)	set		90 to 140
	2098 Now Selling	Super-High-Energy Charpy V-Notch Specimens (NIST-Verification, 8-mm Striker)	set		175 to 240
	2099 Now Selling	Super-High-Energy Charpy V-Notch Specimens (Self-Verification, 8 mm Striker)	set		175 to 240
	2112 Now Selling	Dynamic Impact Force Verification Specimens (Self-Verification, 8 mm Striker; 24 kN nominal)	set		97.5
	2113 Now Selling	Dynamic Impact Force Verification Specimens (Self-Verification, 8 mm Striker; 33 kN nominal)	set		15.3
	2197 Now Selling	Low-Energy Charpy V-Notch Specimens (Self-Verification, 2-mm Striker)	set		15 to 25
	2198 Now Selling	High-Energy Charpy V-Notch Specimens (Self-Verification, 2-mm Striker)	set		95 to 150
	2199 Now Selling	Super-High-Energy Charpy V-Notch Specimens (Self-Verification, 2 mm Striker)	set		180 to 250
	2216 Now Selling	Miniaturized Low-Energy Charpy V-Notch KLST Specimens (Self-Verification)	set		1.4 to 1.8
	2218 Now Selling	Miniaturized High-Energy Charpy V-Notch KLST Specimens (Self-Verification)	set		5.5 to 6
	2219 Now Selling	Miniaturized Super-High Energy Charpy V-Notch KLST Specimens (Self-Verification)	set		9 to 11
	2237 Now Selling	Miniaturized Low-Energy Charpy V-Notch RHS Specimens (Self-Verification)	set		3.5 to 4
	2238 Now Selling	Miniaturized High-Energy Charpy V-Notch RHS Specimens (Self-Verification)	set		13 to 15
	2239 Now Selling	Miniaturized Super-High-Energy Charpy V-Notch RHS Specimens (Self-Verification)	set		33 to 36