Steel B1500HS HS-SZ
Hardness band
HS-SZ = hot stamped with tailored soft zone
Choose for tailored B-pillars where a ductile bainite/ferrite zone must absorb energy or allow local joining.
Values for the HS-SZ condition
Other B1500HS tempers and conditions
B1500HS is listed in 4 conditions; see the grade overview at B1500HS.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
CRDefault Cold rolled | Standard mill supply condition for blanking and tool trials before austenitizing and press hardening. | 380 | 570 | 17 | 170 HB | — |
Cold rolled with Al-Si (AlSi10Fe3) hot-dip coating, as-delivered | Pick when blanks must be austenitized in air without scale — the Al-Si layer prevents oxidation and needs no post-shot-blasting. | 380 | 570 | 16 | 170 HB | 8 % IACS |
HS-SZThis page Hot stamped with tailored soft zone | Choose for tailored B-pillars where a ductile bainite/ferrite zone must absorb energy or allow local joining. | 500 | 750 | 13 | 22 HRC | 7.5 % IACS |
Hot stamped / press hardened | The in-service condition: austenitize ~900–950 °C, form and quench in the die for ~1500 MPa crash-resistant parts. | 1,150 | 1,550 | 6 | 48 HRC | 30 W/m·K |
What is B1500HS HS-SZ?
B1500HS HS-SZ is B1500HS heat treated to HS-SZ — choose for tailored B-pillars where a ductile bainite/ferrite zone must absorb energy or allow local joining. B1500HS HS-SZ has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 63% of steel grades. Elongation at break is 13% and the elastic modulus is 210 GPa (30.5 Msi). B1500HS HS-SZ has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,490°C (2,714 °F). CR is the default condition FabDigit quotes; HS-SZ is available on request or by drawing note.
Advantages
- Good corrosion resistance — 32/100, better than 96% of steel grades
Limitations
- Limited service temperature — 250°C (482 °F), worse than 85% of steel grades
- Difficult to machine — 35/100, worse than 84% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
- Poor heat conductor — 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 80% of steel grades
- Limited ductility — 13%, worse than 78% of steel grades
B1500HS HS-SZ properties
Typical room-temperature values for B1500HS HS-SZ; 23 are specific to this condition. Other listed values are B1500HS reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
B1500HS HS-SZ has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,490°C (2,714 °F).
Mechanical13
B1500HS HS-SZ has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 63% of steel grades. Elongation at break is 13% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
B1500HS HS-SZ is rated for continuous service to 250°C (482 °F). It conducts heat at 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 80% of steel grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
B1500HS HS-SZ conducts electricity at 7.5 % IACS, worse than 67% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (32/100), better than 96% of steel grades.
Sustainability4
Producing a kilogram of B1500HS HS-SZ takes about 32 MJ of energy and emits 2.3 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 20%.
Manufacturability7
B1500HS HS-SZ's machinability is fair (35/100, worse than 84% of steel grades); weldability good (60/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with B1500HS HS-SZ
Is B1500HS easy to machine?
Soft CR condition machines like ordinary C-Mn sheet; after press hardening (≈480 HV) use laser cutting or CBN/carbide with rigid setups — mechanical trimming causes rapid tool wear and edge cracking.
Can B1500HS be welded?
Resistance spot welding is the production route (Al-Si coating needs higher current/longer weld time); avoid heat inputs that temper the martensite and watch HAZ softening in laser welding.
Can B1500HS be formed, bent or molded?
Cold form only in the as-delivered state; final geometry is made by hot stamping at 900–950 °C austenitizing with die quench at >27 °C/s cooling for full martensite.
What surface finishes work on B1500HS?
Al-Si coated parts go straight to phosphate-free pretreatment and cathodic e-coat; bare hot-stamped parts must be shot-blasted to remove scale then coated, and delayed hydrogen cracking risk limits acid pickling and electroplating.
B1500HS 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 |
|---|---|---|
| C | 0.2 – 0.25 | 0.23 |
| Si | 0.15 – 0.35 | 0.25 |
| Mn | 1.1 – 1.4 | 1.25 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.01 | 0 |
| Crhardenability | 0.15 – 0.35 | 0.22 |
| Aldeoxidation | 0.02 – 0.06 | 0.04 |
| Tifixes N to protect boron | 0.02 – 0.05 | 0.04 |
| B | 0 – 0.01 | 0 |
| N | ≤ 0.01 | 0.01 |
| Fe | balance | — |
B1500HS HS-SZ — frequently asked
What is B1500HS HS-SZ used for?
B1500HS HS-SZ is typically used for A- and B-pillar reinforcements, door impact beams, bumper beams, roof rails and roof bows, tunnel and sill reinforcements and front and rear crash boxes. In short: hot-stamping boron sheet.
What is the yield strength of B1500HS HS-SZ?
B1500HS HS-SZ has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 750 MPa (109 ksi) — stronger than 63% of steel grades. Strength varies by condition: see the 4 listed tempers.
Is B1500HS HS-SZ easy to machine?
Not especially — machinability is rated fair (35/100, worse than 84% of steel grades). Soft CR condition machines like ordinary C-Mn sheet; after press hardening (≈480 HV) use laser cutting or CBN/carbide with rigid setups — mechanical trimming causes rapid tool wear and edge cracking.
Can B1500HS HS-SZ be welded?
Yes — weldability is rated good (60/100). Resistance spot welding is the production route (Al-Si coating needs higher current/longer weld time); avoid heat inputs that temper the martensite and watch HAZ softening in laser welding.
What surface finishes work on B1500HS HS-SZ?
Al-Si coated parts go straight to phosphate-free pretreatment and cathodic e-coat; bare hot-stamped parts must be shot-blasted to remove scale then coated, and delayed hydrogen cracking risk limits acid pickling and electroplating.
Can B1500HS HS-SZ be formed, bent or molded?
Cold form only in the as-delivered state; final geometry is made by hot stamping at 900–950 °C austenitizing with die quench at >27 °C/s cooling for full martensite.
What is the maximum service temperature of B1500HS HS-SZ?
B1500HS HS-SZ 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 B1500HS-CR and B1500HS-HS?
CR is the default condition — standard mill supply condition for blanking and tool trials before austenitizing and press hardening. HS: the in-service condition: austenitize ~900–950 °C, form and quench in the die for ~1500 MPa crash-resistant parts. Yield strength is 380 MPa in CR versus 1,150 MPa in HS.
Can FabDigit make parts in B1500HS HS-SZ?
Yes — B1500HS HS-SZ is available for sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Hot Stamping of Ultra High Strength Steels (press hardening 22MnB5 data) — Springer (2021)
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.