Steel SPFC590
SPFC590 is a cold-rolled JIS automotive dual-phase sheet steel comparable to international DP590, supplied at 380 MPa yield, 630 MPa tensile, 27 % elongation and 90 HRB.
Reference datasheet — SPFC590 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 CR condition
SPFC590 tempers and conditions
SPFC590 is supplied in 2 conditions, soft to hard. CR 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 |
|---|---|---|---|---|---|---|
Low yield-ratio dual-phase type | Choose when maximum stretch/deep-draw formability and high bake-hardening are needed at the same 590 MPa tensile class. | 355 | 620 | 29 | 180 HB | 9.5 % IACS |
CRDefault Cold rolled | Standard uncoated SPFC590/DP590 cold-rolled coil or sheet for painted or e-coated structural stampings. | 380 | 630 | 27 | 10 HRC | 9.5 % IACS |
Supply forms, finishes and certifications
Ways SPFC590 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
EG | Electrogalvanized | Coating |
GA | Hot-dip galvannealed | Coating |
GI | Hot-dip galvanized | Coating |
What is SPFC590?
SPFC590 is a cold-rolled JIS automotive dual-phase sheet steel comparable to international DP590, supplied at 380 MPa yield, 630 MPa tensile, 27 % elongation and 90 HRB. It is the most formable of the common DP grades and is stocked as CR, high-yield Y, and GA, GI or EG coated coil, which suits stamped panels, reinforcements and brackets that still need deep draws. Bare sheet has no corrosion resistance (score 12) and weld heat softens the martensite, so coated coil and controlled heat input are normal practice. Move to SPFC780 when strength governs. SPFC590 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). SPFC590 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 630 MPa (91.4 ksi) — weaker than 68% of steel grades. Elongation at break is 27% and the elastic modulus is 207 GPa (30 Msi).
What is SPFC590 used for?
- body panels
- reinforcements
- brackets
Advantages
- Ductile — tolerates forming and impact — 27%, better than 86% of steel grades
- Readily welded — 78/100, better than 78% of steel grades
- High electrical conductivity — 9.5 % IACS, better than 75% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
- Limited service temperature — 300°C (572 °F), worse than 78% of steel grades
SPFC590 properties
Typical room-temperature values for SPFC590-CR; bars are the position among steel grades.
Physical3
SPFC590 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).
Mechanical17
SPFC590 has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 630 MPa (91.4 ksi) — weaker than 68% of steel grades. Elongation at break is 27% and the elastic modulus is 207 GPa (30 Msi).
Thermal6
SPFC590 is rated for continuous service to 300°C (572 °F). It conducts heat at 46 W/m·K (26.6 BTU/hr·ft·°F), better than 71% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
SPFC590 conducts electricity at 9.5 % IACS, better than 75% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of SPFC590 takes about 31 MJ of energy and emits 2.4 kg of CO₂ — more than 64% of steel grades. Typical recycled content is 25%.
Manufacturability6
SPFC590's machinability is fair (45/100, worse than 65% of steel grades); weldability very good (78/100); formability good (58/100).
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. SPFC590 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with SPFC590
Is SPFC590 easy to machine?
Rarely machined; drilling/trimming needs sharp carbide and rigid clamping — work hardens quickly and burrs on sheared edges.
Can SPFC590 be welded?
Excellent RSW with adapted schedules (CE ≈ 0.30–0.38); avoid excessive heat input in laser/MAG welds to limit HAZ softening of the martensite.
Can SPFC590 be formed, bent or molded?
Press form with 15–25 % higher tonnage than mild steel, generous die radii and springback compensation; smooth, burr-free trim edges are essential to avoid edge cracking.
SPFC590 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 |
|---|---|---|
| CDP mill practice; JIS G 3135 sets an upper limit only | ≤ 0.15 | 0.09 |
| Si | ≤ 1.2 | 0.35 |
| Mn | ≤ 2.2 | 1.6 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.02 | 0.01 |
| Alacid-soluble Al, killed steel | 0.02 – 0.1 | 0.04 |
| Cr+Mohardenability additions, mill option | ≤ 1 | 0.25 |
| Nb+Timicroalloying, mill option | ≤ 0.15 | 0.03 |
| Boptional | ≤ 0.01 | |
| Fe | balance |
What surface finishes work on SPFC590?
Phosphate + cathodic e-coat for bare sheet; GA/GI/EG coatings take paint well — no anodizing, and zinc coatings must be considered in weld and adhesive bonding schedules.
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 SPFC590 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Similar grades
- DP590
How much does SPFC590 cost?
SPFC590 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.
SPFC590 — frequently asked
What is SPFC590 used for?
SPFC590 is typically used for body panels, reinforcements and brackets. In short: most formable DP grade; 27 % elongation dual-phase; best-welding AHSS entry.
What is the yield strength of SPFC590?
SPFC590 has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 630 MPa (91.4 ksi) — weaker than 68% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is SPFC590 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Rarely machined; drilling/trimming needs sharp carbide and rigid clamping — work hardens quickly and burrs on sheared edges.
Can SPFC590 be welded?
Yes — weldability is rated very good (78/100). Excellent RSW with adapted schedules (CE ≈ 0.30–0.38); avoid excessive heat input in laser/MAG welds to limit HAZ softening of the martensite.
What surface finishes work on SPFC590?
Phosphate + cathodic e-coat for bare sheet; GA/GI/EG coatings take paint well — no anodizing, and zinc coatings must be considered in weld and adhesive bonding schedules.
Can SPFC590 be formed, bent or molded?
Press form with 15–25 % higher tonnage than mild steel, generous die radii and springback compensation; smooth, burr-free trim edges are essential to avoid edge cracking.
What is the maximum service temperature of SPFC590?
SPFC590 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between SPFC590-CR and SPFC590-Y?
CR is the default condition — standard uncoated SPFC590/DP590 cold-rolled coil or sheet for painted or e-coated structural stampings. Y: choose when maximum stretch/deep-draw formability and high bake-hardening are needed at the same 590 MPa tensile class. Yield strength is 380 MPa in CR versus 355 MPa in Y.
How much does SPFC590 cost?
SPFC590 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
- JIS G 3135 — Cold-reduced high strength steel sheet and strip for automobile structural uses — JSA (2018)
- GB/T 20564.2 — Cold rolled dual phase steel sheet (DP590) — SAC (2017)
- Advanced High-Strength Steels Application Guidelines v7 — WorldAutoSteel (2021)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Cold-rolled dual phase steel DP590 / JAC590 datasheet — Baosteel / Nippon Steel (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.