ASTM A354 TECHNICAL DATA

This specification covers the chemical and mechanical requirements of quenched and tempered alloy steel bolts, studs, and other externally threaded fasteners for application at normal atmospheric temperatures, where high strength is required and for limited application at elevated temperature.

Technical Data: ASTM A354 Chemical Requirements ASTM A354 Hardness Requirements for Full-Sized Fasteners ASTM A354 Tensile Requirements for Full-Size Fasteners ASTM A354 Mechanical Requirements for Machined Specimens

Alloy Steel
Element	Heat Analysis, %	Product Analysis, %

Carbon:
For sizes through 1 1/2 in.	0.30 to 0.53	0.28 to 0.55

For sizes larger than 1 1/2 in.	0.35 to 0.53	0.33 to 0.55

Manganese, min	0.60	0.57
Phosphorus, max	0.035	0.040
Sulfur, max	0.040	0.045
Alloying Elements	A	A
Alloy Steel with Boron Addition
Element	Heat Analysis, %	Product Analysis, %

Carbon:
For sizes through 1 1/2 in.	0.30-0.48	0.28-0.50

For sizes larger than 1 1/2 in.	0.35-0.53	0.35-0.55

Manganese, min	0.60	0.57
Phosphorus, max	0.040	0.045
Sulfur, max	0.040	0.045
Boron	0.0005-0.003	0.0005-0.003
Alloying Elements	^A	^A

^ASteel, as defined by the American Iron and Steel Institute, shall be considered to be alloy when the maximum of the range given for the content of alloying elements exceeds one or more of the following limits: Manganese, 1.65 %; silicon, 0.60 %; copper, 0.60 % or in which a definite range or a definite minimum quantity of any of the following elements is specified or required within the limits of the recognized field of constructional alloy steels: aluminum, chromium up to 3.99 %, cobalt, columbium, molybdenum, nickel, titanium, tungsten, vanadium, zirconium, or any other alloying elements added to obtain a desired alloying effect.

Hardness
Size, in.	Grade	Brinell		Rockwell C
Size, in.	Grade	Minimum	Maximum	Minimum	Maximum
1/4 to 2 1/2	BC	255	331	26	36
Over 2 1/2	BC	235	311	22	33
1/4 to 2 1/2	BD	311	363	33	39
Over 2 1/2	BD	293	363	31	39

Bolt Size, in.	Threads per inch	Stress Area, ^A in.²	Grade BC			Grade BD
			Tensile Strength min, lbf^B	Proof Load, min, lbf^C	Yield Strength (0.2% offset), min, lbf^D	Tensile Strength min, lbf^E	Proof Load, min, lbf^F	Yield Strength (0.2% offset), min, lbf^G



1	2	3	4	5	6	7	8	9
1/4	20	0.0318	4000	3350	3450	4750	3800	4100
1/4	28	0.0364	4550	3820	3950	5450	4350	4700
5/16	18	0.0524	6550	5500	5700	7850	6300	6800
5/16	24	0.0580	7250	6090	6300	8700	6950	7500
3/8	16	0.0775	9700	8150	8450	11650	9300	10075
3/8	24	0.0878	11000	9220	9550	13200	10500	11400
7/16	14	0.1063	13300	11150	11600	15950	12750	13850
7/16	20	0.1187	14840	12470	12900	17800	14200	15400
1/2	13	0.1419	17750	14900	15450	21300	17050	18500
1/2	20	0.1599	19990	16790	17400	24000	19200	20750
9/16	12	0.182	22750	19100	19850	27300	21850	23600
9/16	18	0.203	25400	21400	22100	30400	24400	26350
5/8	11	0.226	28250	23750	24650	33900	27100	29400
5/8	18	0.256	32000	26800	27900	38400	30700	33250
3/4	10	0.334	41750	35050	36400	50100	40100	43400
3/4	16	0.373	46600	39100	40650	56000	44800	48450
7/8	9	0.462	57750	48500	50350	69300	55450	60100
7/8	14	0.509	63600	53400	55450	76400	61100	66150
1	8	0.606	75750	63650	66050	90900	72700	78800
1	12	0.663	82900	69700	72250	99400	79600	86150
1	14 UNS	0.679	84900	71300	74400	101900	81500	88250
1 1/8	7	0.763	95400	80100	83150	114450	91550	99200
1 1/8	8	0.790	98750	82950	86200	118500	94800	102700
1 1/8	12	0.856	107000	89800	93300	128400	102700	111250
1 1/4	7	0.969	121150	101750	105600	145350	116300	126000
1 1/4	8	1.000	125000	105000	109000	150000	120000	130000
1 1/4	12	1.073	134100	112600	116950	161000	128800	139450
1 3/8	6	1.155	144400	121300	125900	173250	138600	150200
1 3/8	8	1.233	154150	129450	134400	185000	148000	160300
1 3/8	12	1.315	164400	138100	143300	197200	157800	170950
1 1/2	6	1.405	175650	147550	153150	210750	168600	182500
1 1/2	8	1.492	186500	156650	162250	233800	175050	194000
1 1/2	12	1.581	197600	166000	172300	237200	189700	205500
1 3/4	5	1.90	237500	199500	207100	285000	228000	247000
1 3/4	8	2.08	260000	218400	226700	312000	249600	270000
2	4 1/2	2.50	312500	262500	272500	375000	300000	325000
2	8	2.77	346250	290850	301950	415000	332400	360000
2 1/4	4 1/2	3.25	406250	341250	354250	487000	390000	422500
2 1/4	8	3.56	445000	373800	388050	534000	422200	462800
2 1/2	4	4.00	500000	420000	436000	600000	480000	520000
2 1/2	8	4.44	550000	466200	483950	666000	532800	577200
2 3/4	4	4.93	566950	468350	488050	690200	517650	566950
2 3/4	8	5.43	624450	515850	537550	750200	570150	624450
3	4	5.97	686550	567150	591050	835800	626850	686550
3	8	6.51	748650	618450	644500	911400	683550	748650
3 1/4	4	7.10	816500	674500	702900	994000	745500	816500
3 1/4	8	7.69	884350	730550	761300	1076600	807650	884350
3 1/2	4	8.33	957950	791350	824650	1166200	874650	957950
3 1/2	8	8.96	1030400	851200	887050	1254400	940800	1030400
3 3/4	4	9.66	1110900	917700	956350	1352400	1014300	1110900
3 3/4	8	10.34	1199100	983300	1023650	1447600	1085700	1189100
4	4	11.08	1274200	1052600	1096900	1551200	1163400	1274200
4	8	11.81	1358200	1122000	1169200	1653400	1240050	1358150

^AStress Area, in.2 = 0.7854 [D − 0.9743/ n] 2 where D = nominal diameter, in., and n = threads/in.
^B Based on 125 000 psi for sizes 1⁄4 to 21⁄2 in., inclusive, and on 115 000 psi for sizes over 21⁄2 to 4 in., inclusive.
^C Based on 105 000 psi for sizes 1⁄4 to 21⁄2 in., inclusive, and on 95 000 psi for sizes over 21⁄2 to 4 in., inclusive.
^D Based on 109 000 psi for sizes 1⁄4 to 21⁄2 in., inclusive, and on 99 000 psi for sizes over 21⁄2 to 4 in., inclusive.
^E Based on 150 000 psi for sizes 1⁄4 to 21⁄2 in., inclusive, and on 140 000 psi for sizes over 21⁄2 to 4 in., inclusive.
^FBased on 120 000 psi for sizes 1⁄4 to 21⁄2 in., inclusive, and on 105 000 psi for sizes over 21⁄2 to 4 in., inclusive.
^G Based on 130 000 psi for sizes 1⁄4 to 21⁄2 in., inclusive, and on 115 000 psi for sizes over 21⁄2 to 4 in., inclusive.

Grade	Size, in.	Tensile Strength min, psi	Yield Strength (0.2% offset), min, psi	Elongation in 2 in. min, %	Reduction of Area, min, %




BC	1/4 to 2 1/2, incl.	125000	109000	16	50
BC	Over 2 1/2	115000	99000	16	45
BD	1/4 to 2 1/2, incl.	150000	130000	14	40
BD	Over 2 1/2	140000	115000	14	40

ASTM A354 TECHNICAL DATA

Chemical Requirements

Hardness Requirements for Full-Size Fasteners

Tensile Requirements for All Full-Size Fasteners - Inch-Pound Units

Mechanical Requirements for Machined Specimens