{"id":519,"date":"2026-08-24T15:52:25","date_gmt":"2026-08-24T10:22:25","guid":{"rendered":"https:\/\/www.rextonsteel.com\/blog\/?p=519"},"modified":"2026-08-24T15:52:25","modified_gmt":"2026-08-24T10:22:25","slug":"450-bhn-plate-vs-400-bhn-plate-which-offers-better-wear-resistance","status":"publish","type":"post","link":"https:\/\/www.rextonsteel.com\/blog\/450-bhn-plate-vs-400-bhn-plate-which-offers-better-wear-resistance\/","title":{"rendered":"450 BHN Plate vs. 400 BHN Plate: Which Offers Better Wear Resistance?"},"content":{"rendered":"

Choosing the right liner wear grade reduces frequent equipment downtime caused by heavy abrasion in mining and quarrying. The <\/span>450 BHN Plate<\/b> sits at the harder end of the abrasion-resistant family, built for sliding wear that strips softer steel within months. The 400 BHN grade covers moderate-duty work. A 50-point Brinell gap changes hardness, toughness, and lifecycle cost, and this comparison weighs both grades against each other.<\/span><\/p>\n

What Are 450 BHN Plate and 400 BHN Plate?<\/b><\/h2>\n

Brinell Hardness Number measures resistance to indentation, tested by pressing a tungsten carbide ball into the plate surface under a fixed load. A 400 BHN plate falls between 360 and 440 on that scale, while a <\/span>450 BHN Plate<\/b> runs from 430 to 480 BHN. Both grades appear in <\/span>wear-resistant steel plates<\/b> used for crusher liners, but the harder plate holds its surface longer under sliding contact. Higher BHN extends service life against abrasion, though it trades away some ductility.<\/span><\/p>\n

450 BHN Plate vs 400 BHN Plate: Key Differences<\/b><\/h2>\n

While hardness is a key factor, toughness and ease of fabrication also determine the optimal steel grade.<\/span><\/p>\n\n\n\n\n\n\n\n\n\n
Parameter<\/b><\/td>\n450 BHN Plate<\/b><\/td>\n400 BHN Plate<\/b><\/td>\n<\/tr>\n
Hardness range<\/span><\/td>\n430 to 480 BHN<\/span><\/td>\n360 to 440 BHN<\/span><\/td>\n<\/tr>\n
Abrasion resistance<\/span><\/td>\nHigher, favors pure sliding wear<\/span><\/td>\nModerate, suited to mixed wear<\/span><\/td>\n<\/tr>\n
Impact toughness<\/span><\/td>\nLower, prone to cracking under shock loads<\/span><\/td>\nBetter absorption under dynamic loading<\/span><\/td>\n<\/tr>\n
Machinability<\/span><\/td>\nHarder to cut and form, slower fabrication<\/span><\/td>\nEasier to weld with standard tooling<\/span><\/td>\n<\/tr>\n
Service life<\/span><\/td>\nLonger under continuous abrasion<\/span><\/td>\nShorter under abrasion, forgiving under impact<\/span><\/td>\n<\/tr>\n
Maintenance cost<\/span><\/td>\nFewer changes, higher cost per sheet<\/span><\/td>\nMore frequent, lower unit cost<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Which Plate Offers Better Wear Resistance?<\/b><\/h2>\n

Under pure sliding abrasion, such as chutes handling dry ore or sand, the <\/span>450 BHN Plate<\/b> wears slower than the 400 BHN grade because its harder surface resists gouging. When impact loading occurs, that advantage diminishes rapidly. Crusher jaws taking repeated shock loads chip a 450 BHN surface sooner than expected, making <\/span>400 BHN steel plate<\/b> the steadier choice in mixed wear-and-impact settings.<\/span><\/p>\n

Industrial Applications of 450 BHN Plate<\/b><\/h2>\n

Operations with continuous, low-impact abrasion gain the highest value from extra hardness. Consequently, mining and cement facilities specify this grade primarily for sliding wear applications.<\/span><\/p>\n