K403 is a nickel-base casting superalloy strengthened by a high titanium and aluminium content forming gamma-prime, with cobalt and molybdenum for solid-solution strengthening. The high titanium level gives strong creep resistance up to about 900 degrees Celsius while keeping the alloy comparatively free of the TCP phases that can embrittle related grades. It is supplied as as-cast master alloy bar and ingot.
Chinese designation: K403 镍基铸造高温合金母合金
| Element | Min % | Max % |
|---|---|---|
| Cr | 10 | 12 |
| Co | 4.5 | 6 |
| Ti | 5.3 | 5.9 |
| Mo | 4.8 | 5.5 |
| Al | 3.8 | 4.5 |
| Fe | — | 0.5 |
| Si | — | 0.2 |
| Mn | — | 0.2 |
| C | 0.11 | 0.18 |
| Zr | 0.03 | 0.08 |
| B | 0.012 | 0.022 |
| P | — | 0.02 |
| S | — | 0.01 |
| Ni | balance | — |
Chemical composition per the grade specification. Values are nominal; the mill test report is issued with every order, traceable to the heat number.
| Supply form | Standard / specification |
|---|---|
| Master alloy bar, as-cast, vacuum induction melted | GJB 5512.1 |
| Master alloy ingot and button | GJB 5512.1 |
| Horizontally vacuum cast bar | Customer specification |
| Remelted casting rod for investment casting | Customer specification |
Master alloy is supplied in the as-cast condition. The melt route, vacuum level and remelting route for the buyer's own foundry are agreed on the order and recorded on the report.
K403 (Cast Alloy 403, Yuzhetskaya 403, GJB 5512.1) is a master alloys grade. K403 is a nickel-base casting superalloy strengthened by a high titanium and aluminium content forming gamma-prime, with cobalt and molybdenum for solid-solution strengthening. The high titanium level gives strong creep resistance up to about 900 degrees Celsius while keeping the alloy comparatively free of the TCP phases that can embrittle related grades. It is supplied as as-cast master alloy bar and ingot.
ROBAN supplies K403 as master alloy bar, as-cast, vacuum induction melted, master alloy ingot and button, horizontally vacuum cast bar, remelted casting rod for investment casting, cut to the length you need and packed for remelting.
Yes. Every order ships with a mill test report covering the actual heat analysis of the melt, together with the heat number and the melt route. 3.2 documentation is available where the contract requires it.
Master alloy is made to order rather than held in stock. The usual lead time is 20 to 40 working days depending on the grade, the melt route and the quantity. Send us your specification for a firm date.
Yes. State the diameter, the length and the condition you need. Bar is normally supplied as-cast and cut to your length, and ingot is supplied as button or cube to match your melting equipment.
Drawing, grade, dimensions, quantity and delivery date — we price from those.
Request a Quote →Heat analysis report issued with every order at no extra charge.
Quality documentation →Shearing, sawing and machining to the tolerances on your drawing.
Capabilities →Buyers often substitute within a family once service conditions, corrosion behaviour or fabrication method narrow the choice.
