Qu4519 Bobbin – Stainless Steel Laser Welding Wire 1.4539 / 904L

Qu4519 is a super-austenitic stainless steel laser welding wire for highly corrosion-resistant applications. The material 1.4539 (904L) is used wherever components must withstand aggressive media such as acids, chlorides or organic solvents — ideal for chemical, pharmaceutical, food and offshore industries.Recommended base materials1.4539 — X1NiCrMoCu25-20-5 / AISI 904L (primary material)1.4500, 1.4505, 1.4506 — austenitic CrNiMoCu alloys1.4536, 1.4585 — acid-resistant special gradesTypical applicationsChemical and pharmaceutical plantsFood and beverage industryOffshore constructionsAcid-resistant vessels and pipingRepair welding on similar stainless steelsAdvantages of 1.4539 / 904LCorrosion-resistant in non-oxidising media (up to 90 % H₂SO₄ and H₃PO₄)Pitting-resistant up to 1000 °C in airPermissible operating temperature −10 °C to +350 °CSuitable for aggressive acids, chlorides and organic solventsRod form: Rod lengths 1000 mm and 333 mm, Ø 0,2 mm – 0,6 mm. Material analysisC: 0.02 | Si: 0.7 | Mn: 2.0 | P: 0.025 | S: 0.02 | Cr: 20.0 | Mo: 5.0 | Ni: 25.0 | Cu: 1.5 | Fe: balance

QuNi25 is used for joint and build-up welding of corrosion resistant steels as well as mixed connections. Application at fluid load of sulfuric acid and phosphoric acid dilution. Titanium stabilized QuNi25 is a full austenitic weld with high resistance against corrosion susceptibility by stress cracking and localized corrosion in chloric media. The weld is non-corroding in seawater.Material analysis C: <0,02 | Si: <0,5 | Mn: 0,9 | Cr: 21,5 | Ni: 42,0 | Mo: 3,0 | Cu: 2,0 | Fe: Rest | Ti: 1,0

QuNi25 is used for joint and build-up welding of corrosion resistant steels as well as mixed connections. Application at fluid load of sulfuric acid and phosphoric acid dilution. Titanium stabilized QuNi25 is a full austenitic weld with high resistance against corrosion susceptibility by stress cracking and localized corrosion in chloric media. The weld is non-corroding in seawater.Material analysis C: <0,02 | Si: <0,5 | Mn: 0,9 | Cr: 21,5 | Ni: 42,0 | Mo: 3,0 | Cu: 2,0 | Fe: Rest | Ti: 1,0

Qu4541 is a titanium-stabilized stainless steel laser welding wire for heat-resistant apparatus and plant construction. The material 1.4541 (X6CrNiTi18-10 / AISI 321) combines the corrosion resistance of the CrNi austenites with reliable protection against intergranular corrosion through titanium stabilization — even in the sensitization range after welding, without solution annealing.Recommended base materials1.4541 — X6CrNiTi18-10 / AISI 321 (primary material)1.4550, 1.4551 — X6CrNiNb18-10 / AISI 347 (Nb-stabilized, closely related)1.4301, 1.4306 — austenitic CrNi standard gradesTypical applicationsApparatus, vessel and plant construction (chemical, petrochemical)Heating, furnace and heat exchanger constructionExhaust systems and high-temperature componentsComponents under thermal cyclic loadRepair welding on similar stainless steelsAdvantages of 1.4541Titanium stabilization prevents intergranular corrosion at weld seamsContinuous service temperature up to approx. 800 °CWeldable without subsequent solution annealingHighly cold-formable, excellent work-hardening behaviorBobbin form: K125, K250, K80, MA125, SH253 — wire weight 100 g–500 g, Ø 0,3 mm – 0,5 mm. Material analysis (wt.-%)C ≤ 0.08 | Si ≤ 1.0 | Mn ≤ 2.0 | Cr 17.0–19.0 | Ni 9.0–12.0 | Ti 5×C up to 0.7 | Fe balance

Qu4550 is a niobium-stabilized stainless steel laser welding wire for heat-resistant apparatus and plant construction. The material 1.4550 / 1.4551 (X6CrNiNb18-10 / AISI 347) combines the corrosion resistance of the CrNi austenites with reliable protection against intergranular corrosion through niobium stabilization — even in the sensitization range after welding, without solution annealing.Recommended base materials1.4550 — X6CrNiNb18-10 (primary material)1.4551 — X6CrNiNb18-10 / AISI 347 (primary material)1.4541 — X6CrNiTi18-10 / AISI 321 (Ti-stabilized, closely related)1.4301, 1.4306 — austenitic CrNi standard gradesTypical applicationsApparatus, vessel and plant construction (chemical, petrochemical)Heating, furnace and heat exchanger constructionExhaust systems and high-temperature componentsComponents under thermal cyclic loadRepair welding on similar stainless steelsAdvantages of 1.4550 / 1.4551Niobium stabilization prevents intergranular corrosion at weld seamsContinuous service temperature up to approx. 800 °CWeldable without subsequent solution annealingHighly cold-formable, excellent work-hardening behaviorBobbin form: K125, K250, K80, MA125, SH253 — wire weight 100 g–500 g, Ø 0,3 mm – 0,6 mm. Material analysis (wt.-%)C ≤ 0.08 | Si ≤ 1.0 | Mn ≤ 2.0 | Cr 17.0–19.0 | Ni 9.0–12.0 | Nb 10×C up to 1.0 | Fe balance

QuMed4551 is a niobium-stabilized stainless steel laser welding wire for heat-resistant apparatus and plant construction. The material 1.4550 / 1.4551 (X6CrNiNb18-10 / AISI 347) combines the corrosion resistance of the CrNi austenites with reliable protection against intergranular corrosion through niobium stabilization — even in the sensitization range after welding, without solution annealing.Recommended base materials1.4550 — X6CrNiNb18-10 (primary material)1.4551 — X6CrNiNb18-10 / AISI 347 (primary material)1.4541 — X6CrNiTi18-10 / AISI 321 (Ti-stabilized, closely related)1.4301, 1.4306 — austenitic CrNi standard gradesTypical applicationsApparatus, vessel and plant construction (chemical, petrochemical)Heating, furnace and heat exchanger constructionExhaust systems and high-temperature componentsComponents under thermal cyclic loadRepair welding on similar stainless steelsAdvantages of 1.4550 / 1.4551Niobium stabilization prevents intergranular corrosion at weld seamsContinuous service temperature up to approx. 800 °CWeldable without subsequent solution annealingHighly cold-formable, excellent work-hardening behaviorBobbin form: K125, K250, K80, MA125, SH253 — wire weight 100 g–500 g, Ø 0,2 mm – 0,8 mm. Material analysis (wt.-%)C ≤ 0.08 | Si ≤ 1.0 | Mn ≤ 2.0 | Cr 17.0–19.0 | Ni 9.0–12.0 | Nb 10×C up to 1.0 | Fe balance