Multicomponent high alloyed alloy 40KHNM

Chemical composition in% of material 40KHNM

Fe C Si Mn Ni S P Cr Mo Co
10.74 — 18.73 0.07 — 0.12 up to 0.5 1.8 — 2.2 15 — 17 until 0.02 until 0.02 19 — 21 6.4 — 7.4 39 — 41
Note: Also chem. composition (different from the above) is specified in GOST 51397 — 99

for clockwork springs, coil coil springs operating at temperatures up to 400 degrees. C, for cores of electrical measuring instruments, for parts in surgery. Technical requirements — according to GOST 10994−74 Precision alloys. Stamps. GOST 14117−85 Tape from precision alloys for elastic elements. Technical conditions GOST 14118−85 Precision alloy wire for elastic elements. Technical conditions GOST R 51397−99 Tape and wire from special alloys for connecting and implantable elements of products for cardiovascular surgery. General specifications.

Classification

Country Section Category
CIS, Russia, Ukraine Precision alloys With preset elastic properties

Chemical composition

Standard Fe, % Si, % Mn, % Co, % Cr, % Ni, % P, % C, % S, % Mo, %
GOST 10994-74 10.74–18.73 < 0.5 1.8–2.2 39–41 19–21 15–17 < 0.02 0.07–0.12 < 0.02 6.4–7.4

Information on suppliers

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers $$\sigma _{U}$$, $$MPa$$ $$\sigma_{P}$$, $$MPa$$ $$\epsilon_L$$, % Treatment
Wire heat-treated 950 450 65
Wire cold-work, half-load 1450 1300 8
Tape cold-work 1370–1770

Standards

Standard Description
GOST 10994-74

Description of chemical elements

Element Units of measurement Description
Fe % Iron
Si % Silicon
Mn % Manganese
Co % Cobalt
Cr % Chrome
Ni % Nickel
P % Phosphorus
C % Carbon
S % Sulfur
Mo % Molybdenum

Description of mechanical properties

Parameter Units of measurement Description
$$\sigma _{U}$$ $$MPa$$ Ultimate tensile strength
$$\sigma_{P}$$ $$MPa$$ Proportionality limit
$$\epsilon_L$$ % Elongation at break (longitudinal)