Characteristics
This precision alloy 42H belongs to the alloys with specified temperature coefficient of linear expansion (TKHR in the temperature range of -70 +340ºC is not higher than 4.5-5.5 [1/ºC]), which is used in the electrovacuum equipment. It has unique physical and technical properties (thermal, elastic, magnetic, electrical) due to balanced chemical composition, careful manufacturing and processing, absence of unnecessary impurities. It belongs to the group of high alloys based on iron, copper, nickel, niobium and cobalt.
Percentage composition
| Si |
C |
Fe |
Mn |
P |
S |
Ni |
Cu |
|---|
| up to 0.3 |
up to 0.03 |
56.14 - 58.5 |
up to 0.4 |
up to 0.015 |
up to 0.015 |
41.5 - 43 |
up to 0.1 |
Physical properties of the alloy 42H.
| Grad |
W/(m-grad) |
1/Grad |
MPa |
kg/m3 |
Oh-m-m |
J/(kg-grad) |
|---|
| T |
l |
a 10 6 |
E 10- 5 |
r |
R 10 9 |
C |
| 20 |
|
|
1.42 |
8200 |
580 |
|
Mechanical properties of alloy 42H at 20 °C.
| Range |
Size |
sT |
sT in |
e.g. |
KCU |
y |
d5 |
Thermal treatment. |
|---|
|
mm |
MPa |
MPa |
- |
kJ/m2 |
% |
% |
- |
| Tightened belt according to GOST 14 080-78 |
|
|
930 |
|
|
|
|
|
Physical properties of the alloy:
| Description |
Designation |
|---|
| - Alloy data acquisition temperature [Grad] |
- T |
| - Modulus of elasticity of the 1st kind, [MPa] |
- E |
| - Coefficient of thermal linear expansion (at 20°C), [1/Grad] |
-a |
| - Specific electrical resistance [Ohm-m] -R |
-R |
| - Specific gravity [g/cm3] -r |
-r |
| - Heat transfer coefficient [W/(m-grad)] -l |
-l |
| - Specific heat capacity (at 20°C), [J/(kg-grad) |
-C |
Mechanical properties:
| Description |
Designation |
|---|
| - Ultimate yield strength (yield strength for permanent deformation) [MPa] |
sT |
| - Tensile strength [MPa] |
sT |
| - Ratio constriction [ % ] |
y |
| - Tensile elongation [ % ] |
d5 |
| - Brinell hardness, in [MPa] |
HB |
| - Impact toughness [ kJ/m2 ] |
KCU |
Magnetic properties :
| Description |
Designation |
|---|
| - Coercive force (within) [ A/m] |
Hc |
| - Magnetic permeability (not more than) [ MHN/m] |
Umax |
| - Losses (not more than) at frequency 50 Hz and 1.0 Tl [ W/kg ] |
P1.0/50 |
| - Magnetic induction Tl (not less) at magnetic field strength 100, in magnetic fields [ A/m] |
B100 |
| - Coercive force (not less), [ A/m] |
Hc |
| - Magnetic permeability (not more than), [ MHN/m] |
Umax |
| - Losses (not more than) at frequency 50 Hz and 1.0 Tl [ W/kg ] |
P1.0/50 |
weldability:
| Designation |
Description |
|---|
| Limited weldable |
- Must be preheated to 100-120°C with subsequent heat treatment |
| no restrictions |
- No need for preheating and final heat treatment |
| Difficult to weld |
- Preheating to 200-300°C with final heat treatment necessary |
Delivery
All 42H products are certified. The technical documentation includes data on the chemical composition, the limiting percentage of impurities, and the mechanical properties of products. With us you can buy in bulk a variety of semi-finished products for large-scale production. We also offer good conditions for retail buyers. You will be satisfied with the level of service and responsiveness of service.
Buy at the best price
Evek GmbH has a wide range of precision alloys in stock. We sell nichrome wire at the best price. It is formed taking into account the European rates for nonferrous metals without including additional costs. The certificate of quality includes data on chemical composition, maximum percentage of impurities and mechanical properties. Cooperation with us provides a number of advantages. Our specialists will be happy to advise you on the purchase of nichrome wire, the right choice of which will determine the performance and durability of the equipment. We will help you not only to determine the optimum parameters of the product, but also offer the best price.
