Alloy ML10

Designation

Name	The value
Designation GOST Cyrillic	МЛ10
Designation GOST Latin	ML10
Transliteration	ML10
By chemical elements	CuЛ10

Description

Alloy ML10 is used: for the manufacture by sand casting and gravity die casting castings stressed parts that require high integrity and high dimensional stability with maximum working temperature of +250 °C — long +350 °C short — term (details of different designs, engines, instruments and assemblies, requiring high integrity).

Note

High-temperature alloy system MD-REE-Zr.
For alloying of the alloy of the rare earth metals neodymium use. The alloy contains also supplements of zinc and zirconium.
Alloy combines sufficiently good mechanical properties at room temperature with high heat resistance, good casting and technological properties, allowing to obtain a dense casting with a uniform mechanical properties in the cross-sections of different thickness.

Standards

Name	Code	Standards
Non-ferrous metals, including rare, and their alloys	В51	GOST 2856-79, OST 3-4132-78
Thermal and thermochemical treatment of metals	В04	OST 1 90121-90
Test methods. Packing. Marking	В59	OST 1 90360-85
Castings, non-ferrous metals and alloys	В84	OST 3-4227-79, OST 1 90200-75, OST 1 90248-77

Chemical composition

Standard	Si	Ni	Fe	Cu	Al	Zn	Zr	Nd	Mg	Be
GOST 2856-79	≤0.03	≤0.005	≤0.01	≤0.03	≤0.02	0.1-0.7	0.4-1	2.2-2.8	Rest	≤0.001

Mg is the basis.
According to GOST 2856-79 and OST 3-4132-78, the content of other impurities is ≤ 0.12%, the sum of the impurities being determined is 0.20%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %
The castings as delivered to EAST 3-4132-78, Casting in sand, shell, investment casting and plaster mold and chill casting GOST 2856-79.
	≥140	≥240	≥3
	≥140	≥230	≥3
Casting forming OST 1 90200-75. In the delivery condition specified in the casting method, delivery condition and strength class KP
	≥132	≥216	≥3.5
	≥137	≥235	≥4
	≥128	≥186	≥2.5
	≥128	≥196	≥3
	≥118	≥177	≥2.5

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

Physical characteristics

Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C	С, J/(kg · °C)
20	412	1780	1132	84	-	10467
100	-	-	1132	-	277	-
200	-	-	1132	-	280	-
300	-	-	1132	-	283	-
400	-	-	1090	-	286	-
500	-	-	-	-	291	-

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity

Technological properties

Name	The value
Features of heat treatment	According to OST 1 90121-90 to improve the mechanical properties (σв, σ0,2) casting in the ground, shell molding, gravity die casting, investment casting and plaster mold apply heat treatment by mode T6 - Tempering by blowing air 540±5 °C (exposure 8-12 h) + Aging at 200±5 °C (delay of 12-18 h), air cooling. In this case the plastic properties decrease. A noticeable increase in the values of σв, σ0,2 is achieved in the hardening of the casting by blowing air. To maximize the mechanical properties of the alloy (σв, σ0,2) mode is applied Kzt61 - Quenching in warm water (80-90 °C) 545±5 °C (delay of 4-8 h) + Aging at 205±5 °C (exposure 8-12 hours), air cooling. To obtain sufficient strength, the stability of the structure and geometrical dimensions used mode T7 - Hardening by blowing air 540±5 °C (exposure 8-12 h) + Aging at 250±5 °C (extract 3-5 h), air cooling.
Corrosion resistance	Parts should be corrosion protection by applying an oxide coating according to GOST 9.025 and coatings for OST 3-1928. 3-1460.