Alloy BT23]

Designation

Name The value
Designation GOST Cyrillic ВТ23
Designation GOST Latin BT23
Transliteration VT23
By chemical elements ВTe23

Description

Alloy BT23] is used: for the manufacture of kavitatsionnogo products.

Note

High strength alloy widely used. The developed technology of manufacture of stampings and forgings weighing up to 3.5 tons with the strength of over 1100 MPa, processes, WTO and textural hardening for production of ball-cylinders of σin>1300 MPa and pipes of variable section.

Standards

Name Code Standards
Non-ferrous metals, including rare, and their alloys В51 OST 1 90013-81, TU 1-5-353-84
Sheets and strips В53 OST 1 90024-94
Bars В55 OST 1 90266-86, OST 1 90107-73, OST 1 90006-86

Chemical composition

Standard C Cr Si Fe N Al V Ti Mo O Zr H
OST 1 90013-81 ≤0.1 0.8-1.4 ≤0.15 0.4-1 ≤0.05 4-6.3 4-5 Rest 1.5-2.5 ≤0.15 ≤0.3 ≤0.015
Ti is the basis.
According to OST 1 90013-81 the total content of other impurities is ≤ 0.30%. A partial replacement of molybdenum by tungsten in an amount not exceeding 0.30% is allowed. The total content of molybdenum and tungsten should not exceed the norms specified in the table for molybdenum. The total content of copper and nickel in an amount not exceeding 0.10% is allowed, including nickel not more than 0.080%. In flat rolled products of alloy VT23 up to 10 mm thick, the aluminum content should be 4.00-5.50%, and in the other types of semi-finished products - 5.20-6.30%.

Mechanical properties

Section, mm σU, MPa d5, % d y, % KCU, kJ/m2 HB, MPa
Sheet. Quenching + Aging
- 1450-1600 4-6 - - - -
Sheet. Annealing
- 1100-1200 10-13 - - - 255-270
Plate on OST 1 90024-94 in the delivery condition. Samples heat-treated aged (transverse)
≤60 1130-1280 - ≥6 ≥11 ≥294 -
≥100 1030-1180 - ≥6 ≥15 ≥294 -
60-100 1080-1230 - ≥6 ≥13 ≥294 -
Bars and rods, hot-rolled. Annealing
≥110 1030-1180 ≥7 - ≥24 ≥294 285-388
65-100 1030-1180 ≥8 - ≥25 ≥294 285-388

Description mechanical marks

Name Description
σU Limit short-term strength
d5 Elongation after rupture
d Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number