Alloy AT3

Designation

Name	The value
Designation GOST Cyrillic	АТ3
Designation GOST Latin	AT3
Transliteration	AT3
By chemical elements	-

Description

Alloy AT3 is used: for the manufacture of semi-finished products (sheets, strips, foils, strips, plates, bars, rods, profiles, tubes, forgings and forged blanks) by the method of deformation, and also ingots; vessels and equipment chemical industry, working under cyclic loads and temperatures up to +350 °C; pins and tool in medicine.

Note

The alloy possesses in comparison with other commercial alloys (including VT1−0) higher corrosion resistance (environment-pharmaceutical, food industry, sea water). The advantages of the alloy should be attributed to its higher (compared to VT1−0) antifriction properties.

Standards

Name	Code	Standards
Non-ferrous metals, including rare, and their alloys	В51	GOST 19807-91
Steel pipes and fittings to them	В62	GOST 21945-76
Sheets and strips	В53	GOST 23755-79
Bars	В55	GOST 26492-85, TU 1-1-38-72, TU 1-5-055-77
Processing of metals by pressure. Forgings	В03	TU 1-5-058-77

Chemical composition

Standard	C	Cr	Si	Fe	N	Al	Ti	O	H
GOST 19807-91	≤0.1	0.2-0.5	0.2-0.4	0.2-0.5	≤0.05	2-3.5	Rest	≤0.15	≤0.008
TU 1-5-058-77	≤0.1	0.2-0.5	0.2-0.35	0.2-0.5	≤0.05	2-3.5	Rest	≤0.15	≤0.015

Ti is the basis.
According to GOST 19807-91, the total content of other impurities is ≤ 0.30%. The mass fraction of hydrogen is indicated for ingots. The mass fraction of copper and nickel should not be more than 0.10% (in total), including nickel not more than 0.08%.

Mechanical properties

Section, mm	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²
Plate in the delivery condition according to GOST 23755-79. Without heat treatment (samples transverse)
11-60	≥590	≥8	≥12	≥440
Forging as supplied on the other 1-5-058-77 annealed (process sample is 15x15 mm)
	≥589	≥15	≥35	≥392
Bars hot rolled autogenie ordinary quality GOST 26492-85 (longitudinal samples)
25-60	≥590	≥15	≥35	≥392

Description mechanical marks

Name	Description
σ_U	Limit short-term strength
d₅	Elongation after rupture
y	The relative narrowing
KCU	Toughness