NM400 (GB/T 24186) equivalent material & chemical composition.
NM400 is the Chinese national standard (GB/T 24186) wear plate with 370–430 HBW surface hardness. It is made by the large Chinese mills, including Baowu/Baosteel, Ansteel, HBIS Wuyang and Valin Xiangtan.
Equivalents, chemical composition, mechanical properties and typical uses below. Confirm the governing standard, product form and condition for your order.
NM400 (GB/T 24186) equivalent grades
- China (GB)
- NM400 (GB/T 24186-2022)
- India (IS)
- IS 18809 ISAR 400 (nearest) · AM/NS Rockstar 400 · JSPL Rockhard 400
- Europe (EN)
- Hardox 400 (SSAB, nearest)
- USA (ASTM / AISI / SAE)
- AR400 (nearest)
Key data
- Family
- Abrasion-resistant steel plate
- Density
- 7.85 g/cm³
- Typical mechanical
- Surface 370–430 HBW · TS ≥1200 MPa · El ≥10% (transverse, by agreement)
- Typical uses
- Mostly used for tipper bodies, buckets, liners and chutes
- Weight
- Calculate NM400 (GB/T 24186) weight
- Datasheet
- NM400 (GB/T 24186) chemical composition PDF
NM400 (GB/T 24186) questions before buying
What is the equivalent of NM400?
Hardox 400, AM/NS Rockstar 400, Jindal Rockhard 400, IS 18809 ISAR 400 and AR400. Chinese mills may add their own brand name; check the mill data sheet and certificate.
Can NM400 be cut, bent and welded?
Yes, with care. Wear plate is quenched and tempered, so use the maker's preheat and heat-input limits, low-hydrogen consumables and generous bend radii. Flame or plasma cutting heats the edge; keep cuts cool to avoid softening or cracking.
How do I order NM400 plate?
Give the grade and maker (or "equivalent 400 BHN acceptable"), thickness × width × length, quantity, whether cut-to-size profiles are needed, and the certificate you need (EN 10204 3.1 with hardness results). Brand names are not interchangeable on a drawing unless the buyer approves the alternative.
Technical reading: GB/T 24186-2022 grade table (Caishuku). Producer references explain material behaviour; they do not confirm the origin or availability of our offered material.
NM400 (GB/T 24186) chemical composition (weight %)
GB/T 24186-2022 NM400 (max unless a range)
| C | Si | Mn | P | S | Cr | Ni | Mo | Ti | B | Al |
|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.30 | ≤0.70 | ≤1.60 | ≤0.025 | ≤0.010 | ≤1.20 | ≤0.70 | ≤0.50 | ≤0.050 | 0.0005–0.006 | ≥0.010 |
NM400 (GB/T 24186) mechanical properties
| Condition / product | Yield MPa | Tensile MPa | Elongation % | Hardness |
|---|---|---|---|---|
| NM400 plate t ≤80 mm (surface; core 330–430) | – | ≥1200 | ≥10 | 370–430 HBW |
| NM400 plate 80–120 mm (surface) | – | ≥1200 | ≥10 | 360–440 HBW |
Compare NM400 (GB/T 24186)
Grades similar to NM400 (GB/T 24186)
More carbon and structural grades
200–250 BHN hard plate (SAILHARD / JSPL Hard / Evonith Hard) · ABREX 400 · ABREX 450 · ABREX 500 · API 5L Gr. B · API 5L X42 · API 5L X52 · API 5L X60 · API 5L X65 · API 5L X70 · API 5L X80 · ASTM A36 · ASTM A53 Gr. B · ASTM A105 · ASTM A106 Gr. B · ASTM A128 Gr. D (Mn13Ni3 manganese steel) · ASTM A128 Gr. E-1 (Mn13Mo1 manganese steel) · ASTM A128 Gr. F (Mn7Mo1 manganese steel) · ASTM A234 WPB · ASTM A333 Gr. 6 · ASTM A515 Gr. 60 · ASTM A515 Gr. 70 · ASTM A516 Gr. 60 · ASTM A516 Gr. 70 · ASTM A517 Gr. F / A514 Gr. F (T-1) · ASTM A537 Class 1 / Class 2 · ASTM A572 Gr. 50 · ASTM A588 Grade A weathering plate · Corten A weathering steel (IRSM 41 type) · CRCA CR1 / DC01 / SPCC · CRCA CR2 / DC03 / SPCD · CRCA CR3–CR4 / DC04–DC05 / SPCE · CREUSABRO 4800 · CREUSABRO 8000 · DILLIDUR 400 · DILLIDUR 450 · DILLIDUR 500 · DILLIDUR 550 · DILLIDUR 600 · GI / GP sheet (galvanized, IS 277) · GL / Galvalume sheet (Al-Zn, IS 15961) · Hardox 400 · Hardox 450 · Hardox 500 · Hardox 500 Tuf · Hardox 550 · Hardox 600 · Hardox Extreme · Hardox HiAce · Hardox HiTuf · HR sheet HR1 / DD11 / SPHC · HR sheet HR2–HR3 / DD12–DD13 / SPHD–SPHE · IS 2062 E250 · IS 2062 E275 · IS 2062 E300 · IS 2062 E350 · IS 2062 E410 · IS 2062 E450 · IS 2062 E550 · IS 2062 E600 · IS 2062 E650 · IS 15103 FR-Fe 410 (fire-resistant steel) · IS 15103 FR-Fe 490 (fire-resistant steel) · Mn13 manganese steel (Hadfield, X120Mn12) · Mn13Cr2 manganese steel (ASTM A128 Gr. C) · Mn18 manganese steel (ZG120Mn17) · Mn18Cr2 manganese steel (ZG120Mn17Cr2) · NM300 (GB/T 24186) · NM360 (GB/T 24186) · NM500 (GB/T 24186) · NM550 (GB/T 24186) · NM600 (GB/T 24186) · PPGI / PPGL (pre-painted, IS 14246) · Rockhard 400 (Jindal Steel) · Rockhard 450 (Jindal Steel) · Rockhard 500 (Jindal Steel) · Rockstar 400 (AM/NS India) · Rockstar 450 (AM/NS India) · Rockstar 500 (AM/NS India) · S355 (S355JR / J0 / J2 / K2) · S690QL · S700MC (Strenx 700MC) · S890QL · S960QL · Ship plate AH36 / DH36 / EH36 · Strenx 1100 (E/F) · Strenx 1300 (E/F) · XAR 400 · XAR 450 · XAR 500 · Zintec / electro-galvanised sheet (DC01+ZE)
See all 318 grades A–Z with UNS, W.Nr, EN and JIS names ›
Frequently asked questions
What is the equivalent of NM400 (GB/T 24186)?
NM400 (GB/T 24186) equivalents: China (GB) NM400 (GB/T 24186-2022); India (IS) IS 18809 ISAR 400 (nearest) · AM/NS Rockstar 400 · JSPL Rockhard 400; Europe (EN) Hardox 400 (SSAB, nearest); USA (ASTM / AISI / SAE) AR400 (nearest). Equivalents are close but not always identical; check the standard on your order.
What is the chemical composition of NM400 (GB/T 24186)?
NM400 (GB/T 24186) (GB/T 24186-2022 NM400 (max unless a range)): C ≤0.30, Si ≤0.70, Mn ≤1.60, P ≤0.025, S ≤0.010, Cr ≤1.20, Ni ≤0.70, Mo ≤0.50, Ti ≤0.050, B 0.0005–0.006, Al ≥0.010 (weight %).
What is the density of NM400 (GB/T 24186)?
About 7.85 g/cm³ (7,850 kg/m³), the value used for weight calculations.
What are the mechanical properties of NM400 (GB/T 24186)?
Typical values for NM400 (GB/T 24186): Surface 370–430 HBW, tensile strength ≥1200 MPa, elongation ≥10% (transverse, by agreement). Actual values depend on the standard, size and heat-treatment condition; check the mill test certificate.
Is NM400 (GB/T 24186) magnetic?
Yes. NM400 (GB/T 24186) is an iron-based steel or iron, so it is strongly magnetic.
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Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request.
Need NM400 (GB/T 24186)?
Steel Impex India, Mumbai, supplies NM400 (GB/T 24186) in pipes, plates, sheets, bars and fittings as available. Send the grade, standard, size and quantity.
Reference basis: Compiled by Steel Impex India. Check each table’s source, product form and delivery condition before use. Sources, calculation methods and corrections.