| BS 970 |
SAE (AISI) |
WERKSTOFF NO. |
| 070 M 55 |
1055 |
1.1209 |
CHEMICAL COMPOSITION
| CARBON |
: 0,50 - 0,60 |
| SILICON |
: 0,05 - 0,35 |
| MANGANESE |
: 0,60 - 0,80 |
| SULPHUR |
: 0,06 MAX |
| PHOSPHORUS |
: 0,06 MAX |
MECHANICAL
PROPERTIES |
CONDITION |
| N |
Q |
R |
T |
| Limited Ruling Sections; mm |
254 |
102 |
64 |
19 |
| Tensile Strength; MPa minimum |
600 / 700 |
690 / 850 |
770 / 930 |
850 / 1000 |
| Yield Stress; MPa minimum |
310 |
415 |
480 |
570 |
| Elongation, percent Min. |
13 |
14 |
14 |
12 |
| Izod Impact Value, Joule |
- |
- |
- |
- |
| Brinell Hardness Number |
201 / 255 |
201 / 255 |
223 / 277 |
248 / 302 |
STANDARD STOCK SIZES IN THE AS ROLLED OR NORMALIZED CONDITION
| SIZE |
Kg/m |
SIZE |
Kg/m |
SIZE |
Kg/m |
SIZE |
Kg/m |
| 20 |
2,466 |
70 |
30,210 |
130 |
104,195 |
230 |
326,148 |
| 25 |
3,853 |
75 |
34,680 |
140 |
120,841 |
240 |
355,125 |
| 30 |
5,549 |
80 |
39,458 |
150 |
138,721 |
250 |
385,336 |
| 35 |
7,553 |
85 |
44,545 |
160 |
157,833 |
280 |
493,40 |
| 40 |
9,865 |
90 |
49,393 |
170 |
178,179 |
305 |
586,34 |
| 45 |
12,485 |
95 |
55,642 |
180 |
199,757 |
330 |
685,20 |
| 50 |
15,413 |
100 |
61,654 |
190 |
222,570 |
350 |
769,84 |
| 55 |
18,650 |
108 |
71,846 |
200 |
246,641 |
|
|
| 60 |
22,195 |
115 |
81,537 |
210 |
271,893 |
|
|
| 65 |
26,049 |
120 |
88,781 |
220 |
298,403 |
|
|
TYPICAL USES
Sprockets and springs, cylinders, cams, cranshafts, keys, small arms parts such as rifle barrels, small gears, machine tools, balls for ball mills, ballraces, machined parts requiring moderate wear resistance.
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