Alloy 3M

Designation

Name	The value
Designation GOST Cyrillic	3М
Designation GOST Latin	3M
Transliteration	3M
By chemical elements	3Cu

Description

Alloy 3M applies: for the production of long products, the manufacture of ingots and semifinished products and the manufacture of parts of special equipment; rods for use in the shipbuilding industry.

Standards

Name	Code	Standards
Bars	В55	OST 1 92062-90, OST В 5.9325-79
Non-ferrous metals, including rare, and their alloys	В51	OST 1 92077-91, TU 1-5-453-78
Processing of metals by pressure. Forgings	В03	ST ЦКБА 010-2004

Chemical composition

Standard	C	Si	Fe	N	Al	Ti	O	Zr
OST 1 92077-91	≤0.1	≤0.12	≤0.25	≤0.04	3.5-5	Rest	≤0.15	0.3

Ti is the basis.
According to OST 1 92077-91 the total allowable content of Cu + Ni ≤ 0.10%, including Ni ≤ 0.08%. The amount of other impurities (not listed in the table, including copper and nickel) ≤ 0.30%. The total content of vanadium and tin is no more than 0.15%. The content of hydrogen in ingots should be ≤ 0.006%. Addition of modifying additives in an amount of ≤ 0.003% is allowed. The alloy modified with boron has an additional index "B".

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d	y, %	KCU, kJ/m²
Bars hot rolled for OST 1 92062-9. In the column ssotoyanii delivery is specified as the material of bars in the manufacture of - state material of bars when testing
10-22	≥490	540-785	≥12	≥30	≥700
10-22	≥235	≥285	-	-	-
25-150	≥490	540-755	≥12	≥30	≥700
25-150	≥235	≥285	-	-	-

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d	Elongation after rupture
y	The relative narrowing
KCU	Toughness