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PromiSpecialยฎ๏ธโs high-performance NM400TUF, NM500TUF, NM500TUF steels are the latest advancements in high toughness crack-resistant and wear-resistant steel, designed specifically to meet the demands of modern construction machinery. These materials deliver an ideal balance of strength and toughness, enabling superior performance in high-impact environments. By enhancing impact toughness without compromising hardness or overall strength, these steel grades effectively prevent cracking and inhibit crack propagation.
Eg. Impact Toughness: At -20ยฐC, NM450TUF achieves over 100 J of impact energy, approximately 60-80% higher than conventional wear plateย and up to four times the national standard.
| Steel Grades | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (A50%) | Brinell Hardness (HBW) | Impact Energy
(KV2, J) |
Available Specification (mm) |
| NM400Tuf |
โฅ1000 (1180) |
โฅ1200 (1390) | โฅ10 (18.3) | 370-430 (405) | โฅ48 (113) | 3.0-25.0*1000-2050 |
| NM450Tuf | โฅ1100 (1290) | โฅ1300 (1540) | โฅ7 (16.5) | 420-480 (453) | โฅ48 (106) | 3.0-25.0*1000-2050 |
| NM500Tuf | โฅ1200 (1390) | โฅ1500 (1680) | โฅ7 (14.5) | โฅ470 (506) | โฅ38 (70) | 3.0-25.0*1000-2050 |
Construction and Mining Equipment: Ideal for wear-prone parts like excavator buckets, loader dump beds, and crusher liners, where reliability and long life are essential.
Automotive Manufacturing: Commonly used for dump truck bodies, offering reduced weight and energy savings compared to conventional steel grades.
Heavy-Duty Structural Applications: Suitable for framework and support structures requiring superior load-bearing capacity and resistance to harsh environmental conditions.
PromiSpecial wear-resistant steel grades, such as NM400TUF and NM500TUF, deliver a hardness range between 370 HBW and 500 HBW (Brinell Hardness). These values significantly enhance surface hardness and durability, extending product lifespan up to 4 times longer than traditional structural steel in high-wear environments, reducing the frequency and cost of replacements.
Our high-toughness steels demonstrate excellent impact resistance, with Charpy V-Notch impact values exceeding 40 J/cmยฒ at temperatures as low as -40ยฐC. This level of impact toughness helps resist cracking and chipping under heavy loads, providing reliable performance even in sub-zero conditions.
PromiSpecial steel offers a yield strength of 700โ1300 MPa, depending on the grade, while maintaining a reduced material thickness. This allows for up to a 50% weight reduction in parts compared to traditional steel with 345 MPa yield strength, enabling manufacturers to design lighter structures without compromising strength.
Available in thicknesses ranging from 3 mm to 25 mm to accommodate a wide range of industrial applications, from thin panels for vehicle bodies to thick plates for heavy machinery wear parts.
| Element | NM 400 Tuf (%) | NM 450Tuf (%) | NM 500 Tuf (%) |
| Carbon (C) | 0.18-0.26 | 0.20-0.28 | 0.25-0.30 |
| Manganese (Mn) | 1.2-1.5 | 1.3-1.6 | 1.4-1.7 |
| Chromium (Cr) | 0.5-1.0 | 0.6-1.1 | 0.7-1.2 |
