Steel Ductibor 500
Ductibor 500 is a low-carbon-equivalent press-hardening steel (PHS) developed as the ductile partner in laser-welded tailored blanks with Usibor grades.
Reference datasheet — Ductibor 500 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 PH condition
Ductibor 500 tempers and conditions
Ductibor 500 is supplied in 2 conditions, soft to hard. PH is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
PHDefault Pre-hardened | Standard in-service condition: die-quenched soft zone with ~600 MPa UTS and >15 % elongation for energy absorption. | 420 | 620 | 17 | 185 HB | — |
Press-hardened laser welded tailored blank | Choose when the part needs a hard anti-intrusion zone (Usibor) plus a ductile crush zone (Ductibor 500) in one stamping. | 420 | 620 | 16 | 185 HB | 8 % IACS |
Supply forms, finishes and certifications
Ways Ductibor 500 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
AD-AS | As-delivered Al-Si coated blank | Surface finish |
What is Ductibor 500?
Ductibor 500 is a low-carbon-equivalent press-hardening steel (PHS) developed as the ductile partner in laser-welded tailored blanks with Usibor grades. In the press-hardened condition it gives about 420 MPa yield, 620 MPa tensile and 17 % elongation at 185 HB (90 HRB), so it forms a controlled, energy-absorbing crush zone in a hot-stamped part. It is supplied AlSi-coated as as-delivered blank stock (AD-AS) and in press-hardened conditions (PH, PH-LWTB). It is not an intrusion-resistance grade; use Usibor-class steel where high strength is needed, and note the AlSi layer is a barrier coating with no galvanic protection. Ductibor 500 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,465°C (2,669 °F). Ductibor 500 has a yield strength of 420 MPa (60.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 53% of steel grades. Elongation at break is 17% and the elastic modulus is 210 GPa (30.5 Msi).
What is Ductibor 500 used for?
- tailored hot-stamped blanks
- crush zones
- rocker reinforcements
Advantages
- Good corrosion resistance — 28/100, better than 94% of steel grades
- Readily welded — 80/100, better than 79% of steel grades
Limitations
- Hard to polish — 40/100, worse than 96% of steel grades
- Limited service temperature — 250°C (482 °F), worse than 85% of steel grades
Ductibor 500 properties
Typical room-temperature values for Ductibor 500-PH; bars are the position among steel grades.
Physical3
Ductibor 500 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,465°C (2,669 °F).
Mechanical14
Ductibor 500 has a yield strength of 420 MPa (60.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 53% of steel grades. Elongation at break is 17% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
Ductibor 500 is rated for continuous service to 250°C (482 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 66% of steel grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
Ductibor 500 conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (28/100), better than 94% of steel grades.
Sustainability4
Producing a kilogram of Ductibor 500 takes about 27 MJ of energy and emits 2.3 kg of CO₂ — less than 59% of steel grades. Typical recycled content is 22%.
Manufacturability7
Ductibor 500's machinability is good (55/100, better than 62% of steel grades); weldability very good (80/100); formability good (55/100).
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. Ductibor 500 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Ductibor 500
Is Ductibor 500 easy to machine?
Sheet product — trimming, piercing and hole-making are done by laser or hard-tool trim after press hardening; carbide/PCD tooling and coating dust extraction are recommended.
Can Ductibor 500 be welded?
Low carbon equivalent gives good resistance spot welding and laser welding, including dissimilar joints to Usibor; remove or manage the AlSi layer in laser butt welds (ablation) to avoid Al enrichment and soft ferrite in the fusion zone.
Can Ductibor 500 be formed, bent or molded?
Blank cold and laser-weld in the as-delivered condition, then austenitise ~900–930 °C and hot stamp/die quench; the grade is intentionally sluggish-hardening so cooling-rate scatter has little effect on final strength.
Ductibor 500 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 |
|---|---|---|
| Clow carbon keeps post-quench structure ferritic-bainitic | 0.05 – 0.12 | 0.09 |
| Si | 0.1 – 0.5 | 0.3 |
| Mn | 1.2 – 2 | 1.6 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.01 | 0 |
| Alkilled steel | 0.02 – 0.08 | 0.04 |
| Cr | ≤ 0.5 | 0.2 |
| Timicro-alloying / B protection | ≤ 0.08 | 0.03 |
| Nb | ≤ 0.06 | 0.02 |
| B | ≤ 0.01 | 0 |
| N | ≤ 0.01 | 0.01 |
| Fe | balance |
What surface finishes work on Ductibor 500?
AlSi coating survives stamping and provides scale-free surface; parts go through standard phosphate + cataphoretic e-coat, with sealer at cut edges since AlSi is barrier-only (no galvanic protection).
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
How much does Ductibor 500 cost?
Ductibor 500 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.
Ductibor 500 — frequently asked
What is Ductibor 500 used for?
Ductibor 500 is typically used for tailored hot-stamped blanks, crush zones and rocker reinforcements. In short: ductile press-hardening grade; tailored-blank crush zone partner; insensitive to cooling-rate scatter.
What is the yield strength of Ductibor 500?
Ductibor 500 has a typical yield strength of 420 MPa (60.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 53% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is Ductibor 500 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Sheet product — trimming, piercing and hole-making are done by laser or hard-tool trim after press hardening; carbide/PCD tooling and coating dust extraction are recommended.
Can Ductibor 500 be welded?
Yes — weldability is rated very good (80/100). Low carbon equivalent gives good resistance spot welding and laser welding, including dissimilar joints to Usibor; remove or manage the AlSi layer in laser butt welds (ablation) to avoid Al enrichment and soft ferrite in the fusion zone.
What surface finishes work on Ductibor 500?
AlSi coating survives stamping and provides scale-free surface; parts go through standard phosphate + cataphoretic e-coat, with sealer at cut edges since AlSi is barrier-only (no galvanic protection).
Can Ductibor 500 be formed, bent or molded?
Blank cold and laser-weld in the as-delivered condition, then austenitise ~900–930 °C and hot stamp/die quench; the grade is intentionally sluggish-hardening so cooling-rate scatter has little effect on final strength.
What is the maximum service temperature of Ductibor 500?
Ductibor 500 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 Ductibor 500-PH and Ductibor 500 PH-LWTB?
PH is the default condition — standard in-service condition: die-quenched soft zone with ~600 MPa UTS and >15 % elongation for energy absorption. PH-LWTB: choose when the part needs a hard anti-intrusion zone (Usibor) plus a ductile crush zone (Ductibor 500) in one stamping. Yield strength is 420 MPa in PH versus 420 MPa in PH-LWTB.
How much does Ductibor 500 cost?
Ductibor 500 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
- Ductibor 500-AS / Usibor press hardenable steels — product data — ArcelorMittal (2023)
- Advanced High-Strength Steels Application Guidelines V7 (PHS section) — WorldAutoSteel (2021)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASTM A370 hardness/tensile conversion practice — ASTM (2022)
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.