{"id":3611,"date":"2026-09-16T11:06:43","date_gmt":"2026-09-16T08:06:43","guid":{"rendered":"https:\/\/www.defencemetal.com\/index.php\/en\/ti-grade-1\/"},"modified":"2026-09-25T16:27:42","modified_gmt":"2026-09-25T13:27:42","slug":"ti-grade-1","status":"publish","type":"page","link":"https:\/\/www.defencemetal.com\/index.php\/en\/ti-grade-1\/","title":{"rendered":"Ti Grade 1"},"content":{"rendered":"

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Ti Grade 1 \/ UNS R50250 \/ AMS 4940<\/h1>\n
DEFENCE METAL<\/span><\/p>\n
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Ti Grade 1<\/div>\n
UNS R50250 \u00b7 W.Nr. 3.7025 \u00b7 DIN 17850 Ti 1 \u00b7 ASTM Grade 1 \u00b7 COMMERCIALLY PURE (unalloyed) titanium, alpha phase. Ceilings: O 0.18% max \u00b7 Fe 0.20% max \u00b7 N 0.03% max \u00b7 C 0.08% max \u00b7 H 0.015% max \u00b7 each other element 0.10% max \u00b7 other elements total 0.40% max \u00b7 balance Ti. It is the LOWEST-OXYGEN and most ductile grade of the family. IT DOES NOT PRECIPITATION HARDEN AND IT DOES NOT QUENCH HARDEN: it is single-phase alpha and strength cannot be added by heat treatment.<\/div>\n
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Not to be confused with<\/div>\n

Ti Grade 2<\/a><\/div>\n<\/div>\n

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For what<\/div>\n
It is bought where formability comes before strength: deep-drawn and heavily bent thin sheet parts, the cladding layer in explosion cladding, anode substrates in chlor-alkali electrolysis, sea-water and brackish-water heat exchanger tubes, expansion bellows and thin-wall chemical process equipment.<\/div>\n<\/div>\n
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Forms<\/div>\n
Round bar \u00b7 flat bar \u00b7 plate \u00b7 sheet \u00b7 thin sheet \/ foil \u00b7 tube \u00b7 forgings. All forms are supplied to order.<\/div>\n<\/div>\n
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Standards<\/div>\n
AMS (verified): 4940 – sheet, strip and plate; commercially pure, annealed, 25.0 ksi (172 MPa) yield strength. No verified AMS number was found for Grade 1 BAR or FORGINGS. ASTM: B265 \/ SB-265 (strip, sheet, plate) \u00b7 B348 (bars and billets) \u00b7 B338 (condenser and heat exchanger tubes, seamless and welded) \u00b7 B861 (seamless pipe) \u00b7 B862 (welded pipe) \u00b7 B363 (welding fittings) \u00b7 B381 Grade F-1 (forgings) \u00b7 B863 (wire) \u00b7 F67 Grade 1 (unalloyed titanium for surgical implants). EN \/ DIN: DIN 17850 Ti 1 (composition, W.Nr. 3.7025) \u00b7 DIN 17860 (sheet\/plate) \u00b7 DIN 17862 (bar) \u00b7 DIN 17864 (forgings). MIL: MIL-T-9046J CP-4 and AMS-T-9046B CP-4 (sheet, strip, plate) – the CP number runs OPPOSITE to the grade number. Welding: AWS A5.16 \/ SFA-5.16 ERTi-1.
THE MIL-T-9046 \/ AMS-T-9046 CP NUMBERS RUN OPPOSITE TO THE ASTM GRADE NUMBERS: CP-1 = Grade 4 \u00b7 CP-2 = Grade 3 \u00b7 CP-3 = Grade 2 \u00b7 CP-4 = Grade 1. If an old drawing says ‘CP-1’, that is Grade 4, not Grade 1.<\/span><\/div>\n<\/div>\n
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Advantage<\/div>\n
Formability. The ASTM B265 floor is 24% elongation and the yield CEILING is 310 MPa; having a yield ceiling in the specification guarantees that the material will not arrive too hard and keeps the springback calculation of press and draw tooling stable.<\/div>\n<\/div>\n
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Welding<\/div>\n
Filler metal: matching commercially pure rod to AWS A5.16 \/ ASME SFA-5.16 – ERTi-1 for Grade 1, ERTi-2 for Grade 2, ERTi-4 for Grade 4. Preheat is NOT required and post-weld heat treatment is not mandatory (Corrosion Materials).<\/div>\n<\/div>\n
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Limits<\/div>\n
IT DOES NOT HARDEN BY HEAT TREATMENT. There is no quenching, no solution treatment and no ageing; when a drawing calls for a hardness value, this grade is the wrong choice. FORBIDDEN BAND – ABOVE 590-620 \u00b0C IN AIR: annealing or hot forming in air above this temperature produces oxide scale and a diffused-in oxygen layer (alpha case);<\/div>\n<\/div>\n
REQUEST A QUOTE<\/a>All titanium alloys →<\/a>TECHNICAL DETAILS ↓<\/span><\/div>\n
Compiled from manufacturer data sheets \u00b7 confirm against the current specification before ordering<\/div>\n<\/div>\n<\/div>\n

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