Mechanical Property | Alloy Steel
Average Physical Properties of Alloy Steel
| AISI | Condition of Bar Steel | Tensile Strength psi |
Yield Strength psi |
Elongation in 2 in., % |
Reduction in Area, % |
Brinell Hardness |
Rockwell Hardness |
Machinability % of B1112 CD |
|---|---|---|---|---|---|---|---|---|
| 4142* | Hot Rolled Annealed Cold Drawn Annealed Heat Treated C.D. 1″ Round Oil Quenched 1550° F., Tempered 1000° F 2″ Round Oil Quenched 1550° F., Tempered 1000° F 3″ Round Oil Quenched 1550° F., Tempered 1000° F |
90/100,000 110/120,000 140/155,000 150/160,000 145/155,000 130/145,000 |
60/70,000 85/95,000 125/140,000 130/140,000 125/135,000 115/125,000 |
20/30 15/25 12/20 15/20 15/20 15/20 |
50/60 45/55 45/55 50/60 50/60 55/65 |
185/210 230/250 270/300 320/350 320/345 280/310 |
91/95B 20/25C 26/30C 34/37C 33/36C 28/32C |
55 65 45 — — — |
| 4147-50* | Hot Rolled Annealed 1″ Round Oil Quenched 1525° F., Tempered 1000° F 3″ Round Oil Quenched 1525° F., Tempered 1000° F 4″ Round Oil Quenched 1525° F., Tempered 1000° F 5″ Round Oil Quenched 1525° F., Tempered 1000° F |
90/105,000 170/180,000 150/160,000 140/150,000 135/150,000 |
65/75,000 145/155,000 130/140,000 120/130,000 115/125,000 |
20/30 15/20 15/20 15/20 15/22 |
50/60 50/60 50/60 50/60 52/62 |
185/215 350/375 325/350 300/330 295/320 |
92/96B 37/39C 34/37C 31/35C 30/34C |
52 — — — — |
| E.T.D.® | Elevated Temperature Drawing | 150,000 Min. | 130,000 Min. | 10/20 | 30/45 | 302 Min. | 32C Min. | |
| E.T.D.® | Elevated Temperature Drawing | 180,000 Min. | 165,000 Min. | 5/10 | 20/40 | 363 Min. | 38C Min. | |
| 4340 | Hot Rolled Annealed 2″ Round Oil Quenched 1550° F., Tempered 1000° F 3″ Round Oil Quenched 1550° F., Tempered 1000° F 4″ Round Oil Quenched 1550° F., Tempered 1000° F 5″ Round Oil Quenched 1550° F., Tempered 1000° F 6″ Round Oil Quenched 1550° F., Tempered 1000° F |
100/120,000 175/190,000 170/180,000 160/170,000 145/160,000 140/150,000 |
70/90,000 155/170,000 140/155,000 135/145,000 125/135,000 120/130.000 |
15/25 12/18 12/20 12/20 10/15 10/15 |
40/50 48/55 45/50 40/50 40/50 40/50 |
220/250 370/400 350/375 330/360 300/330 240/320 |
20/25C 38/42C 36/39C 35/31C 31/36C 30/35C |
45 — — — — — |
| 4615 | Natural Hot Rolled as Rolled Cold Drawn 1″ Round Carburized 1700° F.: Cool in box: Reheat 1525° F., Oil Quenched-Core Properties |
75/85,000 90/100,000 110/125,000 |
53/63,000 75/85,000 80/100,000 |
25/35 15/22 18/23 |
58/68 50/60 50/60 |
145/180 190/215 220/250 |
80/87B 91/96B 20/24C |
50 55 — |
| 4620 | Natural Hot Rolled as Rolled 1″ Round Corburized 1700° F.: Cool in box: Reheat 1525° F., Oil Quenched-Core Properties |
80/110,000 115/130,000 |
60/75,000 80/100,000 |
20/30 15/25 |
50/60 45/55 |
180/220 240/270 |
–24/30C | 50 — |
| 4815 | Natural Hot Rolled as Rolled 1″ Round Carburized 1700° F.: Cool in box: Reheat 1525° F., Oil Quenched-Core Properties |
100/110,000 140/160.000 |
65/75,000 120/140,000 |
20/30 14/18 |
50/60 45/55 |
210/230 300/340 |
95/99B 33/38C |
50 — |
| E52100 | Hot Rolled Annealed 1″ Round Oil Quenched 1500° F., Tempered 1000° F |
100/110,000 180/195,000 |
75/85,000 65/180,000 |
20/25 10/15 |
50/60 35/45 |
210/235 375/415 |
— 40/43C |
45 — |
| 6150 | Hot Rolled Annealed 1″ Round Oil Quenched 1575° F., Tempered 1000° F |
95/110,000 170/185,000 |
75/85,000 150/160,000 |
20/30 12/17 |
50/60 45/55 |
200/230 360/390 |
14/21C 38/41C |
50 — |
| 8620* | Natural Hot Rolled Cold Drawn 1″ Round Carburized 1700° F.: Cool in box: Reheat 1550° F., Oil Quenched—Core Properties |
80/95,000 90/105,000 120/135,000 |
55/65,000 65/80,000 90/110.000 |
18/25 15/25 15/20 |
45/60 40/50 40/50 |
160/200 185/215 285/350 |
85/95B 90/96B 28/40C |
55 60/70 — |
| 8642 | Natural Hot Rolled Hot Rolled Heat Treated Cold Drawn Annealed 1′ Round Oil Quenched 1550° F,, Tempered 1000° F 2′ Round Oil Quenched 1550° F., Tempered 1000° F |
90/120,000 125,000 Min. 100/110,000 150/160,000 130/145,000 |
50/70,000 105,000 Min. 90/100,000 130/140,000 105/115,000 |
15/25 16 Min. 13/20 15/20 15/20 |
35/50 50 Min. 40/50 50/55 50/60 |
210/260 260/320 195/220 325/345 285/310 |
17/27C 26/33 93/98B 34/37C 29/32C |
50/55 45/50 65 — — |
| 8645 | Natural Hot Rolled Annealed Hot Rolled 2″ Round Oil Quenched 1550° F., Tempered 1000° F 3″ Round Oil Quenched 1550° F., Tempered 1000° F |
105/125.000 100/110,000 140/150,000 130/140,000 |
55/75,000 50/60,000 110/125,000 105/115,000 |
15/25 20/25 15/20 15/20 |
35/50 40/55 45/55 50/60 |
220/270 210/230 300/320 285/310 |
20/28C 17/21C 30/34C 29/32C |
48/55 54 — — |
| 8742 | Natural Hot Rolled Cold Drawn Annealed 1″ Round Oil Quenched 1550° F., Tempered 1000° F 2″ Round Oil Quenched 1550° F., Tempered 1000° F |
110/125,000 105/120,000 155/165,000 135/145,000 |
50/70,000 95/105,000 135/145,000 110/120,000 |
15/25 10/18 15/20 15/20 |
35/50 35/45 45/52 50/60 |
230/270 210/235 330/355 290/320 |
22/28C 95/99B 35/38C 30/33C |
45/55 60 — — |
*With the addition of .15/.35 per cent Lead to these alloys, mechanical properties are not appreciably affected.
Machinability, however, is improved approximately 25 per cent.