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Mechanical Properties of Steel
Condition, Strength, Hardness, Machinability

Alloy Steels
SAE No.	Machinability Rating	Condition	Range of Typical Hardness (Brinell)
4037	70	Annealed and Cold Drawn	174-217
8620	65	Hot Rolled and Cold Drawn	179-235
8630	70	Annealed and Cold Drawn	179-229
4130	70	Annealed and Cold Drawn	187-229
4140	65	Annealed and Cold Drawn	187-229

Carbon Steels - Rephosphorized & Resulphurized
Grade	Type of Processing	Estimated Minimum Values		Brinell Hardness	Average Machinability Rating (Cold Drawn 1112-100%)
Grade	Type of Processing	Tensile Strength psi	Yield Strength psi	Brinell Hardness	Average Machinability Rating (Cold Drawn 1112-100%)
1006	Hot rolled	43,000	24,000	86
	Cold drawn	48,000	41,000	95	50
1008	Hot rolled	44,000	24,500	86
	Cold drawn	49,000	41,500	95	55
1010	Hot rolled	47,000	26,000	95
	Cold drawn	53,000	44,000	105	55
1018	Hot rolled	58,000	32,000	116
	Cold drawn	64,000	54,000	126	70
1022	Hot rolled	62,000	34,000	121
1038	Cold drawn	69,000	58,000	137	70
1045	Hot rolled	82,000	45,000	163
	Cold drawn	91,000	77,000	179	55
	ACD	85,000	73,000	170	65
1212	Hot rolled	56,000	33,500	121
	Cold drawn	78,000	60,000	167	100
12L14	Hot rolled	57,000	34,000	121
	Cold drawn	78,000	60,000	163	160
1215	Hot rolled	57,000	34,000	121
	Cold drawn	75,000	65,000	163	160
1117	Hot rolled	62,000	34,000	121
	Cold drawn	69,000	58,000	137	90
1141	Hot rolled	94,000	51,500	187
	Cold drawn	105,100	88,000	212	70
1144	Hot rolled	97,000	53,000	197
	Cold drawn	108,000	90,000	217	80
ACD - annealed, cold drawn. All SAE 1100 series steels are rated on the basis of 0,10 max. silicon or coarse grain melting practice. The mechanical properties shown are expected minimums for the sizes ranging from 3/4" to 1 1/4". REF: SAE J414, Handbook Supplement HS30.

Hardness Relationship to Tensile Strength
Tensile Strength (Approx.) ksi	Rockwell Hardness No.		Hardness No.
Tensile Strength (Approx.) ksi	B Scale	C Scale	Hardness No.
56	65.7		111
60	69.8		121
65	74.0		131
71	78.7		143
76	82.9		156
81	86.0		167
85	87.8		174
90	90.7		187
95	92.8		197
100	94.6		207
105	96.4		217
110	97.8	20	226
114	99.0	22	237
117	100.0	23	243
120		24	247
122		25	253
125		26	258
128		27	264
132		28	271
135		29	279
138		30	286
142		31	294
145		32	301
149		33	311
153		34	319
157		35	327
162		36	336
168		37	344
171		38	353
176		39	362
181		40	371
188		41	381
194		42	390
201		43	400
208		44	409
215		45	421
222		46	432