Steel SPFC980-Y (SPFC980Y)
Hardness band · default condition
Standard bare cold-rolled DP980 coil/blank for interior crash-critical reinforcements that are e-coated after assembly.
Values for the Y condition
Other SPFC980 tempers and conditions
SPFC980 is listed in 2 conditions; see the grade overview at SPFC980.
- Y
- BH
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
YDefaultThis page SPFC980Y | Standard bare cold-rolled DP980 coil/blank for interior crash-critical reinforcements that are e-coated after assembly. | 690 | 1,040 | 10 | 31 HRC | — |
After forming + paint bake | Reference condition for in-service part strength: yield rises from bake hardening and work hardening, ductility drops. | 780 | 1,060 | 8 | 32 HRC | 8.6 % IACS |
What is SPFC980-Y?
SPFC980-Y is SPFC980 heat treated to Y — standard bare cold-rolled DP980 coil/blank for interior crash-critical reinforcements that are e-coated after assembly. SPFC980-Y has a yield strength of 690 MPa (100 ksi) and a tensile strength of 1,040 MPa (151 ksi) — stronger than 80% of steel grades. Elongation at break is 10% and the elastic modulus is 207 GPa (30 Msi). SPFC980-Y has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,480°C (2,696 °F).
Advantages
- High strength — 690 MPa (100 ksi), better than 80% of steel grades
Limitations
- Limited service temperature — 200°C (392 °F), worse than 93% of steel grades
- Limited ductility — 10%, worse than 91% of steel grades
- Difficult to machine — 28/100, worse than 91% of steel grades
SPFC980-Y properties
Typical room-temperature values for SPFC980-Y; 10 are specific to this condition. Other listed values are SPFC980 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
SPFC980-Y has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,480°C (2,696 °F).
Mechanical12
SPFC980-Y has a yield strength of 690 MPa (100 ksi) and a tensile strength of 1,040 MPa (151 ksi) — stronger than 80% of steel grades. Elongation at break is 10% and the elastic modulus is 207 GPa (30 Msi).
Thermal6
SPFC980-Y is rated for continuous service to 200°C (392 °F). It conducts heat at 44 W/m·K (25.4 BTU/hr·ft·°F), better than 57% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
SPFC980-Y conducts electricity at 8.6 % IACS, better than 66% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of SPFC980-Y takes about 32 MJ of energy and emits 2.4 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 25%.
Manufacturability7
SPFC980-Y's machinability is poor (28/100, worse than 91% of steel grades); weldability good (60/100); formability poor (28/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with SPFC980-Y
Is SPFC980 easy to machine?
Trim, pierce and drill with carbide or coated HSS at reduced speed and generous clearance; hardened microstructure wears tooling fast and edges must be kept smooth to avoid edge cracking.
Can SPFC980 be welded?
Resistance spot welding is standard but needs pulsed/short-hold schedules, higher electrode force and tight LME control on Zn-coated versions; laser welding works with tempering passes, arc welding softens the HAZ so joint strength should not be assumed at base-metal level.
Can SPFC980 be formed, bent or molded?
Cold stamp with high-tonnage presses, springback compensation in the die, 8–12 % usable strain, generous bend radii (≥3–4 t) and de-burred/laser-trimmed edges to avoid delayed and edge cracking; roll forming is a good alternative for long sections.
What surface finishes work on SPFC980?
Zinc-phosphate + cathodic e-coat for bare material, or specify GA/GI/EG coated coil; avoid acid pickling and standard electroplating without post-bake because of hydrogen embrittlement risk.
SPFC980 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 |
|---|---|---|
| CJIS G 3135 limits C/P/S; balance chemistry is producer-typical DP design | 0.07 – 0.18 | 0.12 |
| Si | 0.1 – 1 | 0.4 |
| Mn | 1.6 – 2.8 | 2.2 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.01 | 0 |
| Aldeoxidation | 0.02 – 0.08 | 0.04 |
| CrCr+Mo added for hardenability | ≤ 0.6 | 0.25 |
| Mo | ≤ 0.35 | 0.15 |
| Nbmicroalloy, grain refinement | ≤ 0.1 | 0.03 |
| Ti | ≤ 0.1 | 0.02 |
| Boptional | ≤ 0.01 | 0 |
| Fe | balance | — |
SPFC980-Y — frequently asked
What is SPFC980-Y used for?
SPFC980-Y is typically used for B-pillar reinforcements, sills and bumper beams. In short: crash-critical 1040 MPa class; cold-formed alternative to PHS; only 10 % elongation.
What is the yield strength of SPFC980-Y?
SPFC980-Y has a typical yield strength of 690 MPa (100 ksi) and a tensile strength of 1,040 MPa (151 ksi) — stronger than 80% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is SPFC980-Y easy to machine?
Not especially — machinability is rated poor (28/100, worse than 91% of steel grades). Trim, pierce and drill with carbide or coated HSS at reduced speed and generous clearance; hardened microstructure wears tooling fast and edges must be kept smooth to avoid edge cracking.
Can SPFC980-Y be welded?
Yes — weldability is rated good (60/100). Resistance spot welding is standard but needs pulsed/short-hold schedules, higher electrode force and tight LME control on Zn-coated versions; laser welding works with tempering passes, arc welding softens the HAZ so joint strength should not be assumed at base-metal level.
What surface finishes work on SPFC980-Y?
Zinc-phosphate + cathodic e-coat for bare material, or specify GA/GI/EG coated coil; avoid acid pickling and standard electroplating without post-bake because of hydrogen embrittlement risk.
Can SPFC980-Y be formed, bent or molded?
Cold stamp with high-tonnage presses, springback compensation in the die, 8–12 % usable strain, generous bend radii (≥3–4 t) and de-burred/laser-trimmed edges to avoid delayed and edge cracking; roll forming is a good alternative for long sections.
What is the maximum service temperature of SPFC980-Y?
SPFC980-Y is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between SPFC980-Y and SPFC980-BH?
Y is the default condition — standard bare cold-rolled DP980 coil/blank for interior crash-critical reinforcements that are e-coated after assembly. BH: reference condition for in-service part strength: yield rises from bake hardening and work hardening, ductility drops. Yield strength is 690 MPa in Y versus 780 MPa in BH.
Sources
- JIS G 3135 — Cold-reduced steel sheet and strip with low carbon and high strength for automobile structural uses — JSA (2018)
- JIS G 3113 / EN 10338 / VDA 239-100 (CR980Y690T-DP designation) — JSA / CEN / VDA (2021)
- High-strength cold-rolled and coated steel sheets for automobiles (980 MPa DP class) — Nippon Steel / JFE Steel (2022)
- Advanced High-Strength Steels Application Guidelines V7 — WorldAutoSteel (2021)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Life Cycle Inventory data for steel products — worldsteel association (2023)
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.