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Coefficient of thermal expansion
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0.48 - 0.55 %
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14 - 15 %
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0.05 - 0.15 %
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0.1 - 0.15 %
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Parts (pins, shafts, nozzles…) already made with 4112/4125 or 440B/C…High hardness re-quirements with a rather good corrosion resistance.
The corrosion behavior of UGI® 4116N is similar to that of grade 1.4021 (AISI 420), far better than that
of 1.4112 / 1.4125 (AISI 440B and 440C).
Pitting corrosion: UGI® 4116N performs better than high-carbon martensitic grades such as 1.4109, 1.4112 and 1.4125.
The pitting corrosion resistance is better in the Tempered than in the Annealed condition, a feature that is similar for all high-carbon martensitic grades
Machinability: UGI® 4116N can be machined in the annealed condition. The machinability of UGI® 4116N is comparable to that of grade 1.4034 and significantly better than the machinability of grades 1.4112 and 1.4125 (AISI 440B / 440C).
Solution annealing: For minimum hardness, grade 4116N should be treated at about 840°C a few hours followed by very slow cooling. The hardness thus obtained lies around 210 HV1kg.
Solution Treatment and Quenching: Oil quench or air cooling should be carried out from a recommended solution temperature of 1050°C.
Tempering: See below the curve that was obtained after a 10 minutes solution annealing treatment at 1050°C fol-lowed by air cooling. Tempering at 200°C achieves a good hardness / toughness balance.
Forming: UGI® 4116N can be readily forged in the 950°C – 1200°C temperature range. Heating between 1180°C and 1200°C prior to forging is recommended, and forging temperatures should not decrease below 950°C. After forging, a slow cooling to room temperature is necessary, followed by annealing treatment, if a minimum hardness is required.
Other options: contact the supplier
Welding of grade UGI 4116N is only possible with special precautions, and should be avoided whenever possible.