1.4418

HuaNickel 1.4418 is a high-strength low-carbon martensitic austenitic stainless steel. It combines high strength with good weldability and is maintained after welding. The HuaNickel 1.4418 is designed for applications in micro-corrosive environments where the above properties are required.

1.4418Chemical composition：

C	Cr	Ni	Mo
0.03	16	5	1

1.4418Physical properties：

Density	7.7 /g·cm³
Thermal conductivity	15W/m K
Elastic modulus	215kN/mm
Specific heat capacity	430J/kg K
Resistivity	0.8Ω mm2 /m

1.4418Mechanical properties：

Tensile strength Rm	N/mm2	950 – 1100
Proof strength Rp02	N/mm2	Min750
Reduced area	%	Min40
Elongation A5	%	Min16
hardness	HB	280 – 340

1.4418Stainless steel characteristics：

The general corrosion resistance of HuaNickel 1.4418 is better than that of ordinary 13% and 17% chromium stainless steel. It is similar to the austenitic stainless steel of Type 304. Steel appears to have the best advantage in slightly to moderately corroded environments.

1.4418Uses of stainless steel：

Propeller bolting

Propeller shafting

Mixers and mixers are produced

Processing vessels and equipment for the thermomechanical pulp industry.

Hydro turbine components

Equipment for hydroelectric power plants

1.4418Process performance：

Weldability: The weldability of EN 1.4418 is better than that of ordinary martensitic stainless steels. This is due to the nature of the reconstituted structure containing low-carbon martensite and finely dispersed austenite. Welding is best done with Avesta Sheffield HuaNickel 248 SV welding consumables. If the tensile strength of the weld is allowed to be low, an austenitic material of type T316L can be used. Except for heavy structures and special cases, preheating is usually not required. Heat treatment is usually not required after welding. After welding with welding consumables similar to the base metal, tempering at 580 – 5900°C is recommended.

Hot forming: Hot forming should be carried out at temperature intervals: 850 – 11500 C. EN 1.4418 has similar properties to HuaNickel 1.4301. It is recommended to carry out full heat treatment, i.e. quenching and tempering, after thermoforming. Tempering can only be carried out if the surface temperature of the thermoforming and the subsequent cooling rate are carefully controlled. In most cases, a high finishing temperature and a fast cooling rate are required.

Cold forming: The high strength and significant work hardening of steel require special attention when cold forming. Tools and presses must be very rigid and able to withstand high powers. In contrast to austenitic stainless steels, EN 1.4418 may require intermediate annealing operations in extremely cold forming work. It is recommended to temper after the cold working operation exceeds the material stretch by more than 5%. After extensive cold forming, tempering or full quenching and tempering operations should be carried out.