Application of NM450 in the agricultural machinery industry
NM450 steel was originally developed for truck body equipment. This steel has increased hardness (and therefore resistance to abrasion) while maintaining high viscosity and excellent weldability. Today, NM 450 is increasingly used for other purposes. The hardness of a product made of NM 450 steel is usually from 410 to 490HB.
NM450
Key wear-resistant components in agricultural machinery refer to wear-resistant parts used in agricultural machinery such as plowshares, rotary tillers, shovels, harvester blades, and grain storage and conveying equipment.
Chemical composition of steel NM450
| Steel grade | WITH | Si | Mn | P | S | Cr | Ni | Mo | B |
| NM 450 | 0.26 max |
0.70 max |
1.60 max |
0.025 max |
0.015 max |
1.50 max |
1.00 max |
0.50 max |
0.004 max |
Mechanical properties of steel NM450
| Steel grade | Yield strength (MPa) | Tensile strength (MPa) | Elongation A5 (%) | Impact test | Hardness | |
| NM 450 | min 1250 |
min 1500 |
min 10 |
(°C) -20 |
J/cm2 (min) 30 | HBW 410-490 |
Key Applications of NM450 in Agricultural Machinery
Grain Harvesting and Conveying Equipment
Key components of grain harvesting and conveying equipment are subject to long-term sliding wear from grain and impurities. NM450 steel plates are used for chutes, screw conveyors, and liners to reduce wear and extend equipment life.
Harvester Blades and Cutting Bars
The cutter and threshing drum of a combine harvester are subjected to high impact and high wear over a long period of time. NM450
steel plates are used to manufacture these critical components, and their wear resistance and lifespan are 2-3 times longer than that of ordinary steel. This means that the harvester can complete the entire harvest season without replacing the blades.
Rakes and Soil Preparation Tools
Harrows used for post-plow tillage must withstand continuous abrasion from soil and rock. NM450 steel plates are used to manufacture harrow teeth and harrow frames, providing excellent abrasion resistance while maintaining good structural strength.
Plowshares and Tillage Tools
The NM450 is widely used in the manufacture of hydraulic reversible plows and high-speed adjustable-width reversible plows. The plowshare is the part that directly contacts and cuts the soil, often encountering hard obstacles such as rocks and tree roots. The high hardness and wear resistance of the NM450 significantly extend the service life of tillage tools and reduce downtime for replacements.
Benefits of Using NM450 in Agricultural Machinery
| Benefit | Description |
|---|---|
| Extended Service Life | 3-5 times longer than ordinary structural steel like Q345B -2 |
| Weight Reduction | Enables 17-24% weight reduction compared to traditional materials -4 |
| Reduced Downtime | Fewer replacements mean more time in the field |
| Lower Operating Costs | Less frequent parts replacement and reduced fuel consumption |
| Excellent Weldability | Easy to fabricate and repair using standard welding procedures |
NM450 wear-resistant steel plate has become an indispensable material in the manufacture of modern agricultural machinery. Its excellent hardness, toughness, and wear resistance make it an ideal material for tillage tools, harvesting equipment, and grain processing systems.
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FAQ：
What is NM450 steel?
NM450 is a type of abrasion-resistant steel plate known for its exceptional hardness and strength. With a Brinell hardness value of around 450 HBW, NM450 abrasion-resistant plates are engineered to withstand severe wear while maintaining structural integrity.
What is NM450 equivalent to?
NM450 is equivalent to international grades such as Hardox 450 (Sweden, SSAB), AR450 (ASTM standards), JFE-EH450 (Japan), and Dillidur 450V (Germany).
What is the difference between Hardox 450 and NM450?
Impact Toughness: Hardox 450 is known for its superior impact toughness, which allows it to absorb energy without fracturing under impact loads. NM450 may exhibit good impact toughness as well, but the exact values may vary depending on the manufacturer and specific heat treatment applied.