ASTM A449

Scope
This specification covers quenched and tempered steel hex cap screws, bolts, and studs having a minimum tensile strength of 120 ksi for diameters 1″ and smaller, 105 ksi for diameters over 1″ to 1-1/2″ and 90 ksi for diameters 1-3/4″ to 3″ inclusive. It covers hex cap screws, bolts and studs for general engineering use.

Table 2 Chemical Requirements for Type 3 Fasteners

Element	Composition %
	A	B	C	D	E	F
Carbon Heat	0.33-0.40	0.38-0.48	0.15-0.25	0.15-0.25	0.20-0.25	0.20-0.25
Carbon Product	0.31-0.42	0.36-0.50	0.14-0.25	0.14-0.25	0.18-0.27	0.19-0.25
Manganese Heat	0.90-1.20	0.70-0.90	0.80-1.35	0.40-1.20	0.60-1.00	0.90-1.20
Manganese Product	0.86-1.24	0.67-0.93	0.76-1.39	0.36-1.24	0.56-1.04	0.86-1.24
Phosphrous Heat	0.035	0.06-0.12	0.035 max	0.035 max	0.035 max	0.035 max
Phosphrous Product	0.04	0.06-1.25	0.040 max	0.040 max	0.040 max	0.040 max
Sulfur Heat	0.040 max	0.040 max	0.040 max	0.040 max	0.040 max	0.040 max
Sulfur Product	0.045 max	0.045 max	0.045 max	0.045 max	0.045 max	0.045 max
Silicon Heat	0.15-0.35	0.30-0.50	0.15-0.35	0.25-0.50	0.15-0.35	0.15-0.35
Silicon Product	0.13-0.37	0.25-0.55	0.13-0.37	0.20-0.55	0.13-0.37	0.13-0.43
Copper Heat	0.25-0.45	0.20-0.40	0.20-0.50	0.30-0.50	0.30-0.60	0.20-0.40
Copper Product	0.22-0.48	0.17-0.43	0.17-0.53	0.27-0.53	0.27-0.53	0.17-0.43
Nickel Heat	0.25-0.45	0.50-0.80	0.25-0.50	0.50-0.80	0.30-0.60	0.20-0.40
Nickel Product	0.22-0.48	0.47-0.83	0.27-0.53	0.45-1.05	0.55-0.952	0.42-0.68
Chromium Heat	0.45-0.64	0.50-0.75	0.30-0.50	0.50-1.00	0.60-0.90	0.45-0.65
Chromium Product	0.42-0.68	0.47-0.83	0.27-0.53	0.45-1.05	0.55-0.95	0.42-0.68
Vanadium Heat	ᴮ	ᴮ	0.020 min	ᴮ	ᴮ	ᴮ
Vanadium Product	ᴮ	ᴮ	0.010 min	ᴮ	ᴮ	ᴮ
Molybdenum Heat	ᴮ	0.06 max	ᴮ	0.10 max	ᴮ	ᴮ
Molybdenum Product	ᴮ	0.07 max	ᴮ	0.11 max	ᴮ	ᴮ
Titanium Heat	ᴮ	ᴮ	ᴮ	0.05 max	ᴮ	ᴮ
Titanium Product	ᴮ	ᴮ	ᴮ	0.06 max	ᴮ	ᴮ
Source: A449-14

J.H. Botts, LLC

Table 2 Chemical Requirements for Type 3 Fasteners

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