Steel Ductibor 500 PH-LWTB
Grade
PH-LWTB = 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.
Values for the PH-LWTB condition
Other Ductibor 500 tempers and conditions
Ductibor 500 is listed in 2 conditions; see the grade overview at Ductibor 500.
- PH
- PH-LWTB
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 | — |
PH-LWTBThis page 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 |
What is Ductibor 500 PH-LWTB?
Ductibor 500 PH-LWTB is Ductibor 500 in the PH-LWTB grade — choose when the part needs a hard anti-intrusion zone (Usibor) plus a ductile crush zone (Ductibor 500) in one stamping. Ductibor 500 PH-LWTB 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 16% and the elastic modulus is 210 GPa (30.5 Msi). Ductibor 500 PH-LWTB 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). PH is the default condition FabDigit quotes; PH-LWTB is available on request or by drawing note.
Advantages
- Good corrosion resistance — 26/100, better than 93% of steel grades
- Readily welded — 78/100, better than 78% 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 PH-LWTB properties
Typical room-temperature values for Ductibor 500 PH-LWTB; 22 are specific to this condition. Other listed values are Ductibor 500 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
Ductibor 500 PH-LWTB 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 PH-LWTB 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 16% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
Ductibor 500 PH-LWTB 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 PH-LWTB conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (26/100), better than 93% of steel grades.
Sustainability4
Producing a kilogram of Ductibor 500 PH-LWTB 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 PH-LWTB's machinability is fair (52/100, better than 52% of steel grades); weldability very good (78/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Ductibor 500 PH-LWTB
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.
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).
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 | — |
Ductibor 500 PH-LWTB — frequently asked
What is Ductibor 500 PH-LWTB used for?
Ductibor 500 PH-LWTB 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 PH-LWTB?
Ductibor 500 PH-LWTB 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 PH-LWTB easy to machine?
Reasonably — machinability is rated fair (52/100, better than 52% 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 PH-LWTB be welded?
Yes — weldability is rated very good (78/100). 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 PH-LWTB?
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 PH-LWTB 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 PH-LWTB?
Ductibor 500 PH-LWTB 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.