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HEAT RESISTING, HIGH ALLOY STEELS BS3100:1991
| Compositional
Analysis % |
| Grade |
SYMBOL |
ASTM A297 |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
Supply Condition |
| 302C35 |
8/18 |
HF |
0.4 |
2.0 |
2.0 |
0.05 |
0.05 |
17 - 22 |
1.5 |
6 - 10 |
As Cast |
| 309C30 |
12/25 |
HH |
0.5 |
2.5 |
2.0 |
0.05 |
0.05 |
22 - 27 |
1.5 |
10 - 14 |
| 310C45 |
20/25 |
HK |
0.5 |
3.0 |
2.0 |
0.05 |
0.05 |
22 - 27 |
1.5 |
17 - 22 |
| 311C11 |
25/20 |
HN |
0.5 |
3.0 |
2.0 |
0.05 |
0.05 |
17 - 23 |
1.5 |
23 - 28 |
| 330C12 |
37/18 |
HT |
0.75 |
3.0 |
2.0 |
0.05 |
0.05 |
13 - 20 |
1.5 |
30 - 40 |
|
331C60 |
40/20 |
HU |
0.75 |
3.0 |
2.0 |
0.05 |
0.05 |
15 - 25 |
1.5 |
36 - 46 |
|
334C11 |
55/18 |
HW |
0.75 |
3.0 |
2.0 |
0.05 |
0.05 |
10 - 20 |
1.5 |
55 - 65 |
Composition % is maximum unless shown otherwise
Specialist Alloys not shown above:
ASTM B753 Alloy T36:
 Click
for pdf file 
(A
36% nickel-iron alloy possessing a rate of thermal expansion
approximately one-tenth that of carbon steel at temperatures up
to 205șC)
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