PHX Supra Round Bars - Corrosion Resistant Steel
PH X SUPRA is a corrosion-resistant tool steel for plastic moulds and mould inserts which have to meet highest demands on corrosion resistance and hardness. Its chemical composition is based on the American steels according to AISI 15-5PH and AISI 17-4PH Steels with a carbon content below 0.07% that originally were used in applications where high strength, toughness and moderate corrosion resistance were required. These steels especially were used for building components for the aerospace, nuclear and naval industry. Accordingly PH X SUPRA offers some advantages compared to standard quenched and tempered steels such as 1.2316: a higher hardness, an improved polishability, better weldability and corrosion resistance as well as an excellent toughness.
Properly heat treated, that means solution annealed at 1020°C and aged at around 500°C, PHX Supra consists of a lath martensite matrix into which copper- rich epsilon-phase and fine Nb-containing carbides are embedded. The aging results in a marked hardness and strength increase above that observed in the solution annealed condition. Values of 40 HRC equivalent to 1260 N/mm2 are reached. This strength increase is not accompanied by any significant decrease in the tensile ductility. Moreover, another big advantage of PH X SUPRA compared to the standard tool steel 1.2316 is its improved toughness at higher hardness levels. Typical values that were determined in impact bending tests applying unnotched specimens are distinctly higher than 250J.
PHX SUPRA is a Corrosion Resistant & Precipitation Hardened steel with high strength and good toughness. It shows excellent polishability due to the applied remelting process. PHX SUPRA is a martensitic precipitation hardened stainless, PHX SUPRA is supplied in pre-hardened condition with a hardness of 38-42 HRC. PHX Supra Round Bars have Excellent resistance to corrosion, Excellent polishability, Excellent dimensional stability, Good strength, Good toughness. It is ecommended for tools / molds for the processing of corrosion plastics.
PHX SUPRA comes with improved corrosion resistance and toughness is favoured for building plastic mould inserts which are under corrosive attack by the plastics to be processed. It is also known as Precipitation Hardening Steels.
Especially the corrosion resistance of PH X SUPRA is distinctly improved compared to steel 1.2316. In dependence on the acid applied, the mass loss rate of PHX SUPRA is one or more powers of ten lower than the rate of steel 1.2316. Two of the reasons for PHX SUPRA’s improved corrosion resistance are its higher chromium plus
nickel content and the lack of coarse carbide particles. Also, a passivation effect of copper has been reported in literature for 15-5 and 17-4 PH steels, as copper dissolves as Cu+ and Cu++-ions, forming stable corrosion products like Cu2O on the steel surface. Thus the pitting corrosion resistance is improved by inhibiting the anodic reaction.
PH X Supra is also known as PH X Superclean.
PHX Supra Chemical Composition :
| C | 0.15 |
| Cr | 15.00 |
| Ni | 4.50 |
| Cu | 3.50 |
| Nb | + |
PHX Supra Physical Property :
38-42 HRC
Polishing :
Tool should be polished using the guidelines for polishing stainless steel. When properly polished, an A-1 surface finish is achievable.
Application of PHX Supra Round Bars :
For plastic piping & plumbing injection moulds. moulds with strong corrupt resisting used for camera lens, dies for pressing chemically aggressive compounds. high polished tools and moulds for processing of high corrosive plastics, tools for plastic extrusion. Aircraft component.