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Stainless Steel Precision Casting CF8M
The corrosion resistance of stainless steel decreases with the increase of carbon content , so most stainless steel are of low carbon , the maximum not more than 1.2%, and some steel Wc (carbon) or even below 0.03% (as 00Cr12 ). The main alloying elements in Stainless steel is Cr (chromium), and only when the Cr content reaches a certain value,the corrosion resistance of steel functions. Therefore, stainless steel generally have Cr (chromium) content of at least 10.5%. Stainless steel also contains Ni, Ti, Mn, N, Nb, Mo, Si, Cu and other elements.
Chemical composition unit of precision castings CF8M
|
Symbol |
Chemical composition |
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|
|
C max |
Si max |
Mn max |
P max |
S max |
Cr max |
Ni max |
|
CF8M |
0.08 |
1.50 |
1.50 |
0.04 |
0.04 |
17.0~21.0 |
9.0~12.0 |
Mechanical properties of precision castings CF8M
|
Symbol |
Yield point or proof stress σb /MPa |
Tensile strength σb /MPa |
Elongation % min |
According to the contract |
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|
|
|
|
Transverse Shrinkage Z/% |
Impact Toughness KU2/J |
|
|
CF8M |
|
485205 |
30 |
|
|
|
|
Casting Dimensions(mm) |
＞ 25~40 |
＞ 40~63 |
＞ 63~100 |
＞100~160 |
＞ 160~250 |
＞ 250~400 |
＞ 400~630 |
＞ 630~1000 |
＞ 1000~1600 |
＞16~2500 |
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Sand Casting |
Major unit |
± 0.9 |
± 1.0 |
± 1.1 |
± 1.3 |
± 1.4 |
± 1.6 |
± 1.8 |
± 2.0 |
± 2.3 |
± 2.7 |
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|
Minor unit |
±1.8 |
± 2.0 |
± 2.2 |
± 2.5 |
± 2.8 |
± 3.1 |
± 3.5 |
± 4.0 |
± 4.5 |
± 5.0 |
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|
Investment Casting |
CT7 |
± 0.45 |
± 0.50 |
± 0.55 |
± 0.6 |
± 0.7 |
± 0.8 |
± 0.9 |
± 1.0 |
± 1.1 |
± 1.3 |
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