Ost1 90015-77. The welding wire from titanium alloys.
1.1. Wire sizes and maximum deviations should meet the following requirements/
|Wire diameter, mm||Maximum deviations by diameter, mm|
- Titanium welding wire from alloys ВТ2 St., SPT-2 b VT6 SV is made with a diameter not less than 1.6 mm. alloy Wire BT20−1 St and VT20−2 SV is made with a diameter not less than 2.0 mm.
- Other wire sizes not covered by the table may be made by agreement of the parties.
1.3.Example of designation of the welding wire with a diameter of 4.0 mm titanium grade VT1−00:
4 wire VT1−00 OST 90015−77
1.4. Grade of alloy and wire diameter is specified in outfit order.
2. Technical requirements
2.1. Wire is delivered in degassed and etched condition with clean, bright metal surface without oxide tint and reproterol.
By agreement of the parties, the bars are supplied in annealed condition.
2.2. Chemical composition of alloys VT1−00, OT4−1 and OT4 must meet the requirements of CT1 90013−71, wherein the oxygen content of the alloy BT1−00 must not exceed 0.12 percent and a hydrogen content in the alloys OT4−1 and OT4 — 0,006%.
The chemical composition of the alloys ВТ2 St., VT6 St., SPT-2, BT20−1 St and VT20−2 SV should satisfy cktle. obv requirements/
|ВТ2 St.||Basis||2.0 to 3.0||-||-||-||0,15||0,10||0,05||0,04||0,12||0,003||0,3|
|VT20−1 St.||-//-||2.0 to 3.0||0,5−1,5||0,5−1,5||1,0−2,0||0,15||0,10||0,15||0,04||0,12||0,003||0,3|
|Grade||Wire diameter, mm||Tensile strength, kgf/mm2, not more||Elongation, %, not less|
|VT1−00||from 1.0 to 7.0||48,0||15,0|
|OT4−1||from 1.0 to 1.4||80,0||7,5|
|OT4−1||St. of 1.4 to 3.0||80,0||9,0|
|OT4−1||St. is 3.0 to 7.0||80,0||12,0|
|OT4||from 1.0 to 1.4||85,0||7,0|
|OT4||St. of 1.4 to 3.0||85,0||9,0|
|OT4||St. is 3.0 to 7.0||85,0||10,5|
|ВТ2 St.||from 1.6 to 7.0||not less than 47,0||13,0|
|VT6 St.||from 1.6 to 7.0||not less than 68,0||12,0|
|SPT-2||from 1.6 to 7.0||not less than 68,0||13,0|
|VT20−1 St.||from 2.0 to 7.0||80,0||12,0|
|VT20−2 SV.||from 2.0 to 7.0||85,0||10,0|
On the surface of the wire alloys ВТ2 St., VT6 St., SPT-2, BT20−1 St and VT20−2 SV allowed the color of a tint, a small press with a dark barotrauma, risks and sunsets.
2.5.Corrections of surface defects and cleaning them to degassing of the wire. After degassing the permissible sweep of only the local unit of pollution.