Hardened & Tempered Steel

Tensile	Vickers	Brinell	HRC	HRA	15N	30N
1000 lbs/sq in
170	360	342	36.6	68.7	78.6	56.4
175	370	352	37.7	69.2	79.2	57.4
180	380	361	38.8	69.8	79.8	58.4
185	390	371	39.8	70.3	80.3	59.3
190	400	380	40.8	70.8	80.8	60.2
195	410	390	41.8	71.4	81.4	61.1
200	420	399	42.7	71.8	81.8	61.9
204	430	409	43.6	72.3	82.3	62.7
210	440	418	44.5	72.8	82.8	63.5
214	450	428	45.3	73.3	83.2	64.3
220	460	437	46.1	73.8	83.6	64.9
224	470	447	46.9	74.1	83.9	65.7
230	480	(456)	47.7	74.5	84.3	66.4
234	490	(466)	48.4	74.9	84.7	67.1
240	500	(475)	49.1	75.3	85.0	67.7
244	510	(485)	49.8	75.7	85.4	68.3
250	520	(494)	50.5	76.1	85.7	69.0
254	530	(504)	51.1	76.4	86.0	69.5
260	540	(513)	51.7	76.7	86.3	70.0
264	550	(523)	52.3	77.0	86.6	70.5
269	560	(532)	53.0	77.4	86.9	71.2
274	570	(542)	53.6	77.8	87.2	71.7
279	580	(551)	54.1	78.0	87.5	72.1
284	590	(561)	54.7	78.4	87.8	72.7
289	600	(570)	55.2	78.6	88.0	73.2
294	610	(580)	55.7	78.9	88.2	73.7
299	620	(589)	56.3	79.2	88.5	74.2
304	630	(599)	56.8	79.5	88.8	74.6
309	640	(608)	57.3	79.8	89.0	75.1
314	650	(618)	57.8	80.0	89.2	75.5
319	660	-	58.3	80.3	89.5	75.9
324	670	-	58.8	80.6	89.7	76.4
329	680	-	59.2	80.8	89.8	76.8
-	690	-	59.7	81.1	90.1	77.2
-	700	-	60.1	81.3	90.3	77.6
-	720	-	61.0	81.8	90.7	78.4
-	740	-	61.8	82.2	91.0	79.1
-	760	-	62.5	82.6	91.2	79.7
-	780	-	63.3	83.0	91.5	80.4
-	800	-	64.0	83.4	91.8	81.1