1.4828 Heat resistant steel from stock

What is 1.4828 (X15CrNiSi20-12)

The material 1.4828 is a heat-resistant austenitic chromium-nickel-silicon steel. It is characterized by good heat resistance, high resistance to scaling, and good mechanical properties at elevated temperatures. Its silicon content also provides good resistance to oxidizing atmospheres.

International identifiers

AFNOR Z15CNS20.12, AISI 309, JIS SUH309, EN X15CrNiSi20-12, UNS S30900

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Properties of the material 1.4828 (X15CrNiSi20-12)

Properties

Malleability	good
Weldability	good
Machinability	good
Corrosion resistance	low

Forging: The forging process takes place at 1150°C to 800°C followed by rapid water or air cooling.

Welding: The 1.4828 can be weld with all methods without or with slight preheating. After treatment is not necessary, but it should be cooled slowly from the welding heat.

Corrosion resistance: There is little resistance to oxidising and sulphurous gases, which means that it can only be used at temperatures below 650°C. Against carburizing and nitrogen-containing gases, corrosion resistance is not that good.

Machining: Should be performed in the solution-annealed condition at low cutting speeds. Due to the low thermal conductivity, care must be taken to ensure adequate cooling.

Mechanical properties

Hardness according to Brinell: ≤ 223 HB

Tensile strength Rm: 550 - 750 N/mm²

Mechanical properties at room temperature:

Re	A	Z	KV
N/mm²	%	%	J
≥ 230	≥ 30

Physical properties

Density in kg/dm³	7,9
Electr. Resistance at 20°C in (Ω mm²)/m	0,85
Thermal conductivity at 20°C in W/(m K)	15
Specific heat capacity at 20°C in J/(kg K)	500

Special properties

This material can be used in a temperature range of between 800°C and 1000°C
The scale resistant in the air is up to 1000°C

Processing

Cold forming	is possible
Spent processing	is possible
Cold diving	is possible
Free-form and drop forging	is possible
Machine processing	is not common

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Heat treatment 1.4828

With a heat treatment optimum properties of this material are achieved.

	Temperature in °C	Cooling
Heat treatment
Solution annealing (+ AT)	1050 - 1150	water, air

Chemical composition of 1.4828

1.4828 X15CrNiSi20-12	C	Si	Mn	P	S	Cr	Mo	Ni	V
min.		1,5				19,0		11,0
max.	0,20	2,5	2,0	0,045	0,015	21,0		13,0

1.4828 X15CrNiSi20-12	Al	Cu	N	Nb	Ti	Sonstiges
min.
max.			0,10

Areas of application for 1.4828

Instructions for use

Popular heat-resistant steel for furnace construction
Suitable for high-temperature components
High resistance to scaling
High tensile strength even at elevated temperatures
Good mechanical properties at high temperatures
Mechanical properties comparable to material 1.4841

Areas of application

Chain industry
Mechanical engineering
Automotive industry
Apparatus engineering for high-temperature applications
Manufacture of screens
Manufacture of grates

Form of supply and availability of 1.4828

In stock

Available for immediate delivery from stock

Form of supply

Flat steel, solution annealed and quenched

Sawn blank

The processing with the saw is a mechanical processing of the material, which results in a significantly lower unintended deformation and increased hardness for the existing structure, such as the thermal cutting.

Thus, the machined workpiece has a homogeneous structure even at the edge, which does not change in the continuation of the material.
This circumstance allows immediate finishing of the workpiece with milling or drilling. So it is not necessary to anneal the material or make a similar operation beforehand.