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135 MODIFIED VAC-ARC steel is a low alloy nitriding grade with moderate hardenability. It has been designed to provide a high case hardness and to maintain its core strength during the nitriding cycle. VAC-ARC remelting is employed to provide preferred ingot solidification and superior micro-cleanliness. Nitralloy 135 Modified Vac-Arc steel is also produced by vacuum induction melting followed by vacuum arc remelting (VIM-VAR).
| Weight % | C | Mn | Si | Cr | Al | Mo | Fe |
|---|---|---|---|---|---|---|---|
| Typical
Analysis |
0.40 | 0.60 | 0.30 | 1.60 | 1.20 | 0.20 | reminder |
| Tensile | Hardness | ||||||
|---|---|---|---|---|---|---|---|
| Size of Section | Ultimate | Yield | Elongation | Reduction
in Area |
Brinell | ||
| KSI | MPa | KSI | MPa | % | % | ||
| Up to 1½”
(3.8 cm) |
135 | 930 | 100 | 690 | 16 | 50 | 280-340 |
| 1½” to 3”
(3.8 to 7.6 cm) |
125 | 860 | 90 | 620 | 15 | 40 | 280-340 on surface
269-321 on Test speciman |
| 3” to 5”
(7.6 to 12.7 cm) |
110 | 760 | 85 | 580 | 15 | 40 | 269-321 on Surface
240-300 on Test speciman |
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