Alloy 27

Designation

Name	The value
Designation GOST Cyrillic	27
Designation GOST Latin	27
Transliteration	27
By chemical elements	27

Description

Alloy 27 is applied: for rolled metal production, manufacturing of ingots and semifinished products and the manufacture of parts of special equipment, parts of aircraft and instrumentation.

Standards

Name	Code	Standards
Non-ferrous metals, including rare, and their alloys	В51	OST 1 92077-91, TU 1-5-132-78

Chemical composition

Standard	C	Si	Fe	N	Al	V	Ti	Nb	O	Zr
OST 1 92077-91	≤0.1	≤0.12	≤0.25	≤0.04	3-4.2	0.7-1.5	Rest	0.7-1.5	≤0.14	2-3

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 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	d₅, %	y, %	KCU, kJ/m²
The billet according to TU 1-5-132-78. Annealing
Образец 15х15	≥441	588-736	≥15	≥32	≥810
Образец 15х15	≥265	≥343	-	-	-

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
d₅	Elongation after rupture
y	The relative narrowing
KCU	Toughness