Steel Dillidur 400V
GB NM400
Dillidur 400V (NM400 class) is Dillinger's quenched-and-tempered abrasion-resistant plate at about 360–440 HB (nominal 400 HB, 43 HRC), with 1100 MPa yield, 1250 MPa tensile and 10 % elongation, also available stress-relieved.
Reference datasheet — Dillidur 400V is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the QT-400HB condition
Dillidur 400V tempers and conditions
Dillidur 400V is supplied in 3 conditions, soft to hard. QT-400HB is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Q&T 400 HB, heavy plate | Pick for thick liners and heavy structures; surface hardness is maintained but core hardenability, toughness and CEV-driven weldability are less favourable. | 1,000 | 1,200 | 11 | 41 HRC | 7.8 % IACS |
Stress relieved | Use after heavy flame cutting or welding of large fabrications; low-temperature stress relief only — anything above ~250 °C tempers away the wear hardness. | 1,080 | 1,220 | 11 | 42 HRC | 7.8 % IACS |
QT-400HBDefault quenched and tempered, as-delivered wear plate (t ≤ 50 mm) | Standard stocked condition: water-quenched and tempered plate at 360–440 HB for general abrasion service. | 1,100 | 1,250 | 10 | 43 HRC | — |
What is Dillidur 400V?
Dillidur 400V (NM400 class) is Dillinger's quenched-and-tempered abrasion-resistant plate at about 360–440 HB (nominal 400 HB, 43 HRC), with 1100 MPa yield, 1250 MPa tensile and 10 % elongation, also available stress-relieved. It is a regional equivalent of the Hardox 400 class and is used for earthmoving wear liners and agricultural machinery panels where parts are cut, bent and welded in the shop. Cold bending needs radii of about 3–4× thickness, welding needs controlled preheat and interpass limits, and service is capped at 250 °C. XAR 400 or Hardox 400 are direct substitutes on availability. Dillidur 400V has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). Dillidur 400V has a yield strength of 1,100 MPa (160 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 93% of steel grades. Elongation at break is 10% and the elastic modulus is 210 GPa (30.5 Msi).
What is Dillidur 400V used for?
- earthmoving equipment
- wear liners
- agricultural machinery
Advantages
- High strength — 1,100 MPa (160 ksi), better than 93% of steel grades
Limitations
- Limited ductility — 10%, worse than 91% of steel grades
- Difficult to machine — 28/100, worse than 91% of steel grades
- Limited service temperature — 250°C (482 °F), worse than 85% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
Dillidur 400V properties
Typical room-temperature values for Dillidur 400V-QT-400HB; bars are the position among steel grades.
Physical3
Dillidur 400V has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
Dillidur 400V has a yield strength of 1,100 MPa (160 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 93% of steel grades. Elongation at break is 10% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
Dillidur 400V is rated for continuous service to 250°C (482 °F). It conducts heat at 38 W/m·K (22 BTU/hr·ft·°F), worse than 69% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
Dillidur 400V conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of Dillidur 400V takes about 26 MJ of energy and emits 2.2 kg of CO₂ — less than 64% of steel grades. Typical recycled content is 25%.
Manufacturability5
Dillidur 400V's machinability is poor (28/100, worse than 91% of steel grades); weldability good (55/100); formability poor (30/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. Dillidur 400V is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Dillidur 400V
Is Dillidur 400V easy to machine?
Machine at 400 HB with rigid setups, negative-rake coated carbide or CBN, low speeds and heavy feeds; drilling needs high thrust and coolant, and plasma/laser-cut edges should be dressed before machining.
Can Dillidur 400V be welded?
Weldable with low-hydrogen consumables (softer than base metal is acceptable); control preheat (typically 100–175 °C by thickness/CEV), keep interpass below ~225 °C and limit heat input to protect the HAZ hardness.
Can Dillidur 400V be formed, bent or molded?
Cold bendable with generous radii (about 3–4× thickness, bend axis transverse to rolling direction) on high-tonnage presses; no hot forming above ~250 °C without full re-hardening.
Dillidur 400V chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Cladle analysis max, thickness dependent | ≤ 0.2 | 0.16 |
| Si | ≤ 0.8 | 0.35 |
| Mn | ≤ 1.7 | 1.3 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.01 | 0 |
| Cr | ≤ 1 | 0.5 |
| Nihigher in heavy gauges for hardenability | ≤ 1 | 0.3 |
| Mo | ≤ 0.5 | 0.2 |
| Bboron treated for hardenability | ≤ 0.01 | 0 |
| Fe | balance |
What surface finishes work on Dillidur 400V?
Shot-blast and paint or use a corrosion-resistant liner coating for outdoor/wet duty; hard chrome or thermal spray is unnecessary and hot-dip galvanizing risks tempering and hydrogen issues.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel Dillidur 400V in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- GB (China)
- NM400
How much does Dillidur 400V cost?
Dillidur 400V is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Dillidur 400V — frequently asked
What is Dillidur 400V used for?
Dillidur 400V is typically used for earthmoving equipment, wear liners and agricultural machinery. In short: 400 HB weldable wear plate; hardox 400 class alternative; stress-relieved option available.
What is the yield strength of Dillidur 400V?
Dillidur 400V has a typical yield strength of 1,100 MPa (160 ksi) and a tensile strength of 1,250 MPa (181 ksi) — stronger than 93% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is Dillidur 400V easy to machine?
Not especially — machinability is rated poor (28/100, worse than 91% of steel grades). Machine at 400 HB with rigid setups, negative-rake coated carbide or CBN, low speeds and heavy feeds; drilling needs high thrust and coolant, and plasma/laser-cut edges should be dressed before machining.
Can Dillidur 400V be welded?
Yes — weldability is rated good (55/100). Weldable with low-hydrogen consumables (softer than base metal is acceptable); control preheat (typically 100–175 °C by thickness/CEV), keep interpass below ~225 °C and limit heat input to protect the HAZ hardness.
What surface finishes work on Dillidur 400V?
Shot-blast and paint or use a corrosion-resistant liner coating for outdoor/wet duty; hard chrome or thermal spray is unnecessary and hot-dip galvanizing risks tempering and hydrogen issues.
Can Dillidur 400V be formed, bent or molded?
Cold bendable with generous radii (about 3–4× thickness, bend axis transverse to rolling direction) on high-tonnage presses; no hot forming above ~250 °C without full re-hardening.
What is the maximum service temperature of Dillidur 400V?
Dillidur 400V is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Dillidur 400V QT-400HB and Dillidur 400V-SR?
QT-400HB is the default condition — standard stocked condition: water-quenched and tempered plate at 360–440 HB for general abrasion service. SR: use after heavy flame cutting or welding of large fabrications; low-temperature stress relief only — anything above ~250 °C tempers away the wear hardness. Yield strength is 1,100 MPa in QT-400HB versus 1,080 MPa in SR.
How much does Dillidur 400V cost?
Dillidur 400V is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- Dillidur 400V abrasion-resistant plate data sheet — AG der Dillinger Hüttenwerke (2020)
- GB/T 24186 High-strength wear-resistant steel plate (NM400) — SAC (2022)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.19 — Fatigue and Fracture — ASM International (1996)
- Hardox 400 data sheet (class benchmark for cross-check) — SSAB (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.