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Heat resistant steel grate 1.4845
EU countries usually follow strict industrial standards and environmental protection requirements in the selection of heat resistant steel grate. Material selection not only pays attention to high temperature performance, but also takes into account corrosion resistance, economy and compliance. The following are the eu common material types and their application characteristics:
1. Main materials and European standards
(1) Austenitic Stainless steel (Austenitic Stainless Steels)
Typical card number:
1.4845 (X15CrNiSi2521, corresponding to US 310S):
The antioxidant temperature can reach 1100℃, which is widely used in high temperature corrosion environment.
1.4833 (X12CrNi2313, corresponding to US 309S):
The antioxidant temperature is about 1000℃, and the cost is slightly lower, which is suitable for medium and high temperature boilers and heat treatment furnaces.
characteristic:
High chromium and nickel content (Cr 2025%, Ni 1220%) provides excellent oxidation resistance and chloride / sulfide corrosion resistance, good welding performance, is the mainstream choice in the European Union.
(2) Ferric body stainless steel (Ferritic Stainless Steels)
Typical card number:
1.4762 (X10CrAlSi25, corresponding to US 446):
With high chromium content (25% Cr) and antioxidant temperature of about 900℃, it is suitable for oxidation environment such as coal-fired boilers.
characteristic:
The cost is low, but the high temperature strength and thermal fatigue resistance are weaker than austenitic steel, which is mostly used in low temperature or limited budget scenarios.
(3) Nickel-based alloy (NickelBased Alloys)
Typical card number:
Inconel 600(2.4816)：
Temperature resistance of 1200℃ +, permeable carburization and sulfide corrosion, used in chemical reactor or extreme high temperature incinerator.
Inconel 625(2.4856)：
Add molybdenum and niobium, resistant to chloride ion corrosion, suitable for Marine environment or wet corrosion area of waste incinerators.
characteristic:
Excellent performance but high cost, the EU is mostly used for key components or regulatory mandatory high corrosion environment.
(4) Heat-resistant cast iron (HeatResistant Cast Iron)
Typical card number:
GX40CrSi28(ENJS1029)：
High chromium cast iron (2530% Cr), excellent wear resistance, used for the ash of the grate serious wear area.
characteristic:
Low cost and wear resistance, but large brittleness, need to avoid impact load, common in the local reinforcement of biomass boilers.
2. Factors influencing the material selection
(1) Environmental protection regulations are driven
The European Union Waste Incineration Directive (WID 2000 / 76 / EC) requires the control of dioxin and acid gas emissions, the grate to withstand corrosion of HCl, SO ₂, and promote the use of high chromium nickel materials (e. g. 1.4845 or Inconel 625).
(2) Energy efficiency standards
The EU Ecological Design Directive (ErP) encourages efficient combustion technologies, grate requires optimized ventilation structures (such as hollow design), and materials with both high temperature strength and lightweight characteristics.
(3) Requirements for circular economy
The material should be recyclable (such as stainless steel recovery rate> 90%), and the proportion of refractory cast iron is gradually decreased due to the high difficulty of recovery.
3. Typical application scenarios match with materials
application scenarios
Commonly used in the European Union
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