ASTM B36 Specification - Boltport Fasteners LLP

ASTM B36 Specification

• Home
• Specifications
• ASTM
• ASTM B36

• Scope
• Chemical Composition
• Mechanical Properties, (inch-pound units)
• Mechanical Properties, (SI units)
• Grain Size
• Rockwell Hardness
• (inch-pound units) Rockwell Hardness
• (SI units) Rockwell Hardness

This specification establishes the requirements for brass plate, sheet, strip, and rolled bar of the following alloys.Units—The values stated in either SI units or inchpound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.

Chemical Composition

Copper Alloy UNS No.	Copper, %	Lead, max, %	Iron, max, %	Zinc
C21000	94.0 to 96.0	0.05	0.05	remainder
C22000	89.0 to 91.0	0.05	0.05	remainder
C22600	86.0 to 89.0	0.05	0.05	remainder
C23000	84.0 to 86.0	0.05	0.05	remainder
C24000	78.5 to 81.5	0.05	0.05	remainder
C26000	68.5 to 71.5	0.07	0.05	remainder
C2680oA	64.0 to 68.5	0.09	0.05	remainder
C272008	62.0 to 65.0	0.07	0.07	remainder
C28000c	59.0 to 63.0	0.09	0.07	remainder

Note:

A. Material shall be free from beta constituent when examined at a magnification of 75 diameters. B. Small amounts of beta constituent, if present, may interfere in some instances with severe forming or drawing; therefore, suitability for forming or drawing should be established between manufacturer and purchaser. C. It is anticipated that this material will contain the beta constituent that may interfere with severe forming or drawing operations.

Mechanical Properties (inch-pound units) Requirements and Approximate Rockwell Hardness Values for Rolled Temper (H) Product

Rolled Temper		Tensile Strength, ksi		Approximate Rockwell HardnessA
Temper Designation		Min	Max	B Scale				Superficial 30-T
Standard	Former			0.020 to 0.036 in. incl		Over 0.036 in.		0.012 to 0.028 in. incl		Over 0.028 in.
				Min	Max	Min	Max	Min	Max	Min	Max
Copper Alloy UNS No. C21000
M20	Ashot-roll ed	32	42	...	...	...	...	...	...	...	...
H01	Quarter hard	37	47	20	48	24	52	34	51	37	54
H02	Half-hard	42	52	40	56	44	60	46	57	48	59
H03	Three-quarter-hard	46	56	50	61	53	64	52	60	54	62
H04	Hard	50	59	57	64	60	67	57	62	59	64
H06	Extra hard	56	64	64	70	66	72	62	66	63	67
H08	Spring	60	68	68	73	70	75	64	68	65	69
H10	Extra spring	61	69	69	74	71	76	65	69	66	70
Copper Alloy UNS No. C22000
M20	Ashot-roll ed	33	43	...	...	...	...	...	...	...	...
H01	Quarter-hard	40	50	27	52	31	56	34	51	37	54
H02	Half-hard	47	57	50	63	53	66	50	59	52	61
H03	Three-quarter-hard	52	62	59	6B	62	71	55	62	5B	64
H04	Hard	57	66	65	72	6B	75	60	65	62	67
H06	Extra hard	64	72	72	77	74	79	64	6B	66	69
H08	Spring	69	77	76	79	78	81	67	69	68	70
H10	Extra spring	72	8O	78	81	80	83	68	70	69	71
Copper Alloy UNS No. C22600
H01	Quarter-hard	42	52	29	58	29	58	39	58	39	58
H02	Half-hard	48	58	52	68	52	68	54	64	54	64
H03	Three-quarter-hard	53	63	61	73	61	73	59	68	59	68
H04	Hard	58	67	67	77	67	77	64	70	64	70
H06	Extra hard	65	73	74	81	74	81	68	73	68	73
H08	Spring	70	78	78	83	78	83	71	74	71	74
H10	Extra spring	74	82	81	86	81	86	73	76	73	76
Copper Alloy UNS No. C23000
M20	shot-roll ed	37	47	...	...	...	...	...	...	...	...
H01	Quarter-hard	44	54	33	58	37	62	42	57	45	60
H02	Half-hard	51	61	56	68	59	71	56	64	58	66
H03	Three-quarter-hard	57	67	66	73	69	76	63	68	65	70
H04	Hard	63	72	72	78	74	80	67	71	68	72
H06	Extra hard	72	80	78	83	80	85	70	74	71	75
H08	Spring	78	86	82	85	84	87	74	76	75	77
H10	Extra spring	82	90	84	87	86	89	75	77	76	78
Copper Alloy UNS No. C24000
M20	shot-roll ed	41	51	...	...	...	...	...	...	...	...
H01	Quarter-hard	48	58	38	61	42	65	42	57	45	60
H02	Half-hard	55	65	59	70	62	73	56	64	58	66
H03	Three-quarter-hard	61	71	69	76	72	79	63	68	65	70
H04	Hard	68	77	76	82	78	84	68	72	69	73
H06	Extra hard	78	87	83	87	85	89	72	75	73	76
H08	Spring	85	93	87	90	89	92	75	77	76	78
H10	Extra spring	89	97	88	91	90	93	76	78	77	79
Copper Alloy UNS No. C26000
M20	As hot-rolled	41	51	...	...	...	...	...	...	...	...
H01	Quarter-hard	49	59	40	61	44	65	43	57	46	60
H02	Half-hard	57	67	60	74	63	77	56	66	58	68
H03	Three-quarter-hard	64	74	72	79	75	82	65	70	67	72
H04	Hard	71	81	79	84	81	86	70	73	71	74
H06	Extra hard	83	92	85	89	87	91	74	76	75	77
H08	Spring	91	100	89	92	90	93	76	78	76	78
H10	Extra spring	95	104	91	94	92	95	77	79	77	79
Copper Alloy UNS No. C26800
M20	As hot-rolled	40	50	...	...	...	...	...	...	...
H01	Quarter-hard	49	59	40	61	44	65	43	57	46	60
H02	Half-hard	55	65	57	71	60	74	54	64	56	66
H03	Three-quarter-hard	62	72	70	77	73	80	65	69	67	71
H04	Hard	6S	78	76	82	78	84	68	72	69	73
H06	Extra-hard	79	89	83	87	85	89	73	75	74	76
H08	Spring	86	95	87	90	89	92	75	77	76	78
H10	Extra spring	90	99	88	91	90	93	76	78	77	79
Copper Alloy UNS No. C27200
M20	As hot-rolled	41	51	...	...	...	...	...	...	...	...
H01	Quarter-hard	49	59	40	61	44	65	43	57	46	60
H02	Half-hard	56	66	57	74	60	76	54	67	56	68
H03	Three-quarter-hard	63	73	71	78	74	81	64	70	66	71
H04	Hard	70	80	76	82	78	84	67	72	68	73
H06	Extra hard	81	91	82	87	85	89	71	75	72	76
Copper Alloy UNS No. C28000
M20	As hot-rolled	40	55	...	...	...	...	...	...	...	...
H01	Quarter-hard	50	62	40	65	45	70	45	65	45	70
H02	Half-hard	58	70	50	75	52	80	50	70	50	75
H03	Three-quarter-hard	60	75	55	80	55	82	52	78	55	80
H04	Hard	70	85	60	85	60	87	55	80	55	82
H06	Extra hard	82	95	65	92	65	90	60	85	60	85

Note:

A. Rockwell hardness values apply as follows: the B scale values apply to metal 0.020 in. and over in thickness, and the 30-T scale values apply to metal 0.012 in. and over in thickness.

Mechanical Properties (SI units) Requirements and Approximate Rockwell Hardness Values for Rolled Temper (H) Product

Rolled Temper		Tensile Strength, , MPaA		Approximate Rockwell HardnessB
Temper Designation		Min	Max	B Scale				Superficial 30-T
Standard	Former			0.50 to 0.90 mm incl		Over 0.90 mm		0.30 to 0.70 mm incl		Over 0.70 mm
				Min	Max	Min	Max	Min	Max	Min	Max
Copper Alloy UNS No. C21000
M20	A.s hot-rolled	220	290	...	...	...	...	...	...	...	...
H01	Quarter hard	255	325	20	48	24	52	34	51	37	54
H02	Half-hard	290	355	40	56	44	60	46	57	48	59
H03	Three-quarter-hard	315	385	50	61	53	64	52	60	54	62
H04	Hard	345	405	57	64	60	67	57	62	59	64
H06	Extra hard	385	440	64	70	66	72	62	66	63	67
H08	Spring	415	470	68	73	70	75	64	68	65	69
H10	Extra sorina	420	475	69	74	71	76	65	69	66	70
Coooer Allov UNS N0.C22000
M20	A.s hot-rolled	230	295	...	...	...	...	...	...	...	...
H01	Quarter-hard	275	345	27	52	31	56	34	51	37	54
H02	Half-hard	325	395	50	63	53	66	50	59	52	61
H03	Three-quarter-hard	355	425	59	68	62	71	55	62	58	64
H04	Hard	395	455	65	72	68	75	60	65	62	67
H08	Extra hard	440	405	72	77	74	70	64	88	66	60
H08	Spring	475	530	76	79	78	81	67	69	68	70
H10	Extra spring	495	550	78	81	80	83	68	70	69	71
Copper Alloy UNS No. C22600
H01	Quarter-hard	290	355	29	58	29	58	39	58	39	58
H02	Half-hard	330	400	52	68	52	68	54	64	54	64
H03	Three-quarter-hard	365	435	61	73	61	73	59	68	59	68
H04	Hard	400	460	67	77	67	77	64	70	64	70
H06	Extra hard	450	505	74	81	74	81	68	73	68	73
H08	Spring	485	540	78	83	78	83	71	74	71	74
H10	Extra sprina	510	565	81	86	81	86	73	76	73	76
Copper Allov UNS N0.C23000
M20	Ashot-rolled	255	325	...	...	...	...	...	...	...	...
H01	Quarter-hard	305	370	33	58	37	62	42	57	45	60
H02	Half-hard	350	420	56	68	59	71	56	64	58	66
H03	Three-quarter-hard	395	460	66	73	69	76	63	68	65	70
H04	Hard	435	495	72	78	74	80	67	71	68	72
H06	Extra hard	495	550	78	83	80	85	70	74	71	75
H08	Spring	540	595	82	85	84	87	74	76	75	77
H10	Extra sorina	565	620	84	87	86	89	75	77	76	78
Coooer Allov UNS No.C24000
M20	Ashot-rolled	285	350	...	...	...	...	...	...	...	...
H01	Quarter-hard	330	400	38	61	42	65	42	57	45	60
H02	Half-hard	38O	450	59	70	62	73	56	64	58	66
H03	Three-quarter-hard	420	490	69	76	72	79	63	68	65	70
H04	Hard	470	530	76	82	78	84	68	72	69	73
H06	Extra hard	540	600	83	87	85	89	72	75	73	76
H08	Spring	585	640	87	90	89	92	75	77	76	78
H10	Extra spring	615	670	88	91	90	93	76	78	77	79
Copper Alloy UNS No. C26000
M20	As hot-rolled	285	350	...	...	...	...	...	...	...	...
H01	Quarter-hard	340	405	40	61	44	65	43	57	46	60
H02	Half-hard	395	460	60	74	63	77	56	66	58	68
H03	Three-quarter-hard	440	510	72	79	75	82	65	70	67	72
H04	Hard	490	560	79	84	81	86	70	73	71	74
H06	Extra hard	570	635	85	89	87	91	74	76	75	77
H08	Spring	625	690	89	92	90	93	76	78	76	78
H10	Extra spring	655	715	91	94	92	95	77	79	77	79
Copper Alloy UNS N0.C26800
M20	As hot-rolled	275	345	...	...	...	...	...	...	...
H01	Quarter-hard	340	405	40	61	44	65	43	57	46	60
H02	Half-hard	380	450	57	71	60	74	54	64	56	66
H03	Three-quarter-hard	425	495	70	77	73	80	65	69	67	71
H04	Hard	470	540	76	82	78	84	68	72	69	73
H06	Extra-hard	545	615	83	87	85	89	73	75	74	76
H08	Spring	595	655	87	90	89	92	75	77	76	78
H10	Extra spring	620	685	88	91	90	93	76	78	77	79
Coooer Alloy UNS No.C27200
M20	As hot-rolled	285	350	...	...	...	...	...	...	...	...
H01	Quarter-hard	340	405	40	61	44	65	43	57	46	60
H02	Half-hard	385	455	57	74	60	76	54	67	56	68
H03	Three-quarter-hard	435	505	71	78	74	81	64	70	66	71
H04	Hard	485	550	76	82	78	84	67	72	68	73
H06	Extra hard	560	625	82	87	85	89	71	75	72	76
Coooer Alloy UNS No.C28000
M20	As hot-rolled	275	380	...	...	...	...	...	...	...	...
H01	Quarter-hard	345	425	40	65	45	70	45	65	45	70
H02	Half-hard	400	485	50	75	52	80	50	70	50	75
H03	Three-quarter-hard	415	515	55	80	55	82	52	78	55	80
H04	Hard	485	585	60	85	60	87	55	80	55	82
H06	Extra hard	565	655	65	92	65	90	60	85	60	85

Note:

A. MPa (Mega Pascals) B. Rockwell hardness values apply as follows: the B scale values apply to metal 0.50 mm and over in thickness, and the 30-T scale values apply to metal 0.30 mm and over in thickness.

Grain Size Requirements for Annealed (OS) Product

                                                               

Copper Alloy UNS No.	Standard Temper Designation (Classification B601)	Grain Size, mm
		Nominal	Min	Max
C21000	OS050	0.050	0.035	0.090
OS035	0.035	0.025	0.050
OS025	0.025	0.015	0.035
OS015	0.015	A	0.025
C22000	OS050	0.050	0.035	0.090
OS035	0.035	0.025	0.050
OS025	0.025	0.015	0.035
OS015	0.015	A	0.025
C22600	OS050	0.050	0.035	0.090
OS035	0.035	0.025	0.050
OS025	0.025	0.015	0.035
OS015	0.015	A	0.025
C23000	OS070	0.070	0.050	0.100
OS050	0.050	0.035	0.070
OS035	0.035	0.025	0.050
OS025	0.025	0.015	0.035
OS015	0.015	A	0.025
C24000	OS070	0.070	0.050	0.120
OS050	0.050	0.035	0.070
OS035	0.035	0.025	0.050
OS025	0.025	0.015	0.035
OS015	0.015	A	0.025
C26000	OS120	0. 120	0.070
and	OS070	0.070	0.050	0.120
C26800	OS050	0.050	0.035	0.070
OS035	0.035	0.025	0.050
OS025	0.025	0.015	0.035
OS015	0.015	A	0.025
C27200	OS035	0.035	0.025	0.050
OS025	0.025	0.015	0.035
OS015	0.015	A	0.025
C28000	OS035	0.035	0.025	0.050
OS025	0.025	0.015	0.035
OS015	0.015	A	0.025

Note: A. Although no minimum grain size is required, this material must be fully recrystallized.

Approximate Rockwell Hardness of Annealed (OS) Product

Anneal Temper, Nominal Grain Size	Standard Temper Designation (Classification B601)	Approximate Rockwell HardnessA
		F Scale		Superficial 30-T
		Min	Max	Min	Max
UNS No. C21000
0.050-mm	OS050	40B	52B	...	4
0.035-mm	OS035	47B	54B	...	7
0.025-mm	OS025	50B	61B	1	17
0.015-mm	OS015	54B	65B	7	23
UNS No. C22000
0.050-mm	OS050	50	60	1	16
0.035-mm	OS035	54	64	7	21
0.025-mm	OS025	58	70	13	31
0.015-mm	OS015	62	75	19	39
UN8 No.C22600
0.050-mm	OS050	48	58	6	18
0.035-mm	OS035	52	62	10	23
0.025-mm	OS025	55	67	14	29
0.015-mm	OS015	58	76	18	40
UNS No. C23000
0.070-mm	OS070	53	60	6	...
0.050-mm	OS050	56	63	10	...
0.035-mm	OS035	58	76	13	24
0.025-mm	OS025	60	72	16	34
0.015-mm	OS015	62	79	19	48
UNS No. 24000
0.070-mm	OS070	53	64	2	21
0.050-mm	OS050	57	67	8	27
0.035-mm	OS035	61	72	16	35
0.025-mm	OS025	63	77	20	42
0.015-mm	OS015	66	83	25	50
UNS Nos C26000 and C26800
0.120-mm	OS120	50	62	...	21
0.070-mm	OS070	52	67	3	27
0.050-mm	OS050	61	73	20	35
0.035-mm	OS035	65	76	25	38
0.025-mm	OS025	67	79	27	42
0.015-mm	OS015	72	85	33	50
UNS No.C27200
0.035-mm	OS035	65	76	25	38
0.025-mm	OS025	67	79	27	42
0.015-mm	OS015	72	85	33	50
UNS No. C28000
0.035-mm	OS035	65	80	26	44
0.025-mm	OS025	68	83	28	48
0.015-mm	OS015	72	90	30	55

Note:

A. Rockwell hardness values apply as follows: The F scale applies to metal 0.020 in. or 0.50 mm in thickness and over; the 30-T scale applies to metal 0.015 in. or 0.38 mm in thickness and over. B. This alloy in these several annealed tempers is too soft for Rockwell F hardness tests below 0.030 in. or 0.75 mm in thickness.

Mechanical Properties (inch-pound units) Requirements and Approximate Rockwell Hardness Values for Annealed-to-Temper (O) Product

Annealed-to-Temper		Tensile Strength, ksi		Approximate Rockwell HardnessA
Temper Designation		Min	Max	B Scale		Superficial 30-T
Standard	Former			Min	Max	Min	Max
Copper Alloy UNS No. C22000
O81	Quarter-hard	40	50	...	45	28	52
Copper Alloy UNS No. C22600
O81	Quarter-hard	42	52	20	50	30	54
Copper Alloy UNS No. C23000
O81	Quarter-hard	44	54	30	53	35	54
Copper Alloy UNS No. C24000
O81	Quarter-hard	48	58	33	53	38	54
Copper Alloy UNS No. C26000
O81	Quarter-hard	49	59	32	55	36	53
O82	Half-hard	57	67	52	72	50	66
Copper Alloy UNS No. C26800
O81	Quarter-hard	49	59	33	55	37	55
O82	Half-hard	55	65	52	72	51	67

Note:

A. Rockwell hardness values apply as follows: The B scale applies to metal 0.020 in. in thickness and over; the 30T applies to metal 0.015 in. in thickness and over.

Mechanical Properties (SI units) Requirements and Approximate Rockwell Hardness Values for Annealed-to-Temper (O) Product

Annealed-to-Temper		Tensile Strength, MPaA		Approximate Rockwell HardnessA
Temper Designation		Min	Max	B Scale		Superficial 30-T
Standard	Former			Min	Max	Min	Max
Copper Alloy UNS No. C22000
O81	Quarter-hard	275	345	...	45	28	52
Copper Alloy UNS No. C22600
O81	Quarter-hard	290	355	20	50	30	54
Copper Alloy UNS No. C23000
O81	Quarter-hard	305	370	30	53	35	54
Copper Alloy UNS No. C24000
O81	Quarter-hard	330	400	33	53	38	54
Copper Alloy UNS No. C26000
O81	Quarter-hard	340	405	32	55	36	53
O81	Quarter-hard	395	460	32	55	36	53
Copper Alloy UNS No. C26800
O81	Quarter-hard	340	405	33	55	37	55
O82	Half-hard	380	450	52	72	51	67

Note:

A. MPa (Mega Pascals) B. Rockwell hardness values apply as follows: The B scale applies to metal 0.50 mm in thickness and over; the 30T applies to metal 0.38 mm in thickness and over