Steel HC300LA
EN HC300LA
HC300LA is a European cold-rolled micro-alloyed HSLA sheet steel with a 300 MPa minimum yield, available bare (CR, pickled and oiled) or coated as +ZE, +Z, +ZF, +ZM and +AS.
Reference datasheet — HC300LA 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
HC300LA tempers and conditions
HC300LA is supplied in 5 conditions, soft to hard. CR is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
CRDefault Cold rolled | Standard bare cold-rolled coil/blank for structural stampings that are subsequently phosphated and e-coated. | 335 | 420 | 28 | 130 HB | — |
Electrolytically zinc coated | Choose for good surface appearance and moderate corrosion protection on visible or painted structural parts. | 335 | 420 | 27 | 130 HB | 10 % IACS |
Hot-dip galvanized | Highest-volume coated form for automotive body-in-white and chassis brackets needing cathodic protection. | 335 | 420 | 26 | 130 HB | 10 % IACS |
Zinc-magnesium-aluminium coated | Use where equal corrosion life is wanted at reduced coating weight, e.g. underbody and chassis parts. | 335 | 420 | 26 | 130 HB | 10 % IACS |
Galvannealed zinc-iron coating | Pick when superior paint adhesion and spot-weldability are needed; coating is more brittle in severe draws. | 340 | 425 | 25 | 132 HB | 10 % IACS |
Supply forms, finishes and certifications
Ways HC300LA is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
+AS | Aluminium-silicon hot-dip coated | Surface finish |
PICKLED-OILED | Pickled & oiled bare coil | Surface finish |
What is HC300LA?
HC300LA is a European cold-rolled micro-alloyed HSLA sheet steel with a 300 MPa minimum yield, available bare (CR, pickled and oiled) or coated as +ZE, +Z, +ZF, +ZM and +AS. Default-condition properties are 335 MPa yield, 420 MPa tensile, 28 % elongation and 130 HB, supplied as coil, strip and blanks for stamped structural parts. It trades formability for strength (formability score 68 against 70 for HC260LA), shows noticeably higher springback than mild steel, and bare sheet has almost no corrosion resistance (score 10); service is rated to 300 °C. Use HC260LA where the part draws deeper. HC300LA has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,495°C (2,723 °F). HC300LA has a yield strength of 335 MPa (48.6 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 77% of steel grades. Elongation at break is 28% and the elastic modulus is 210 GPa (30.5 Msi).
What is HC300LA used for?
- automotive structural parts
- reinforcement panels
- chassis brackets
Advantages
- Ductile — tolerates forming and impact — 28%, better than 89% of steel grades
- Readily welded — 88/100, better than 87% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
- Forms and bends easily — 68/100, better than 83% of steel grades
- Conducts heat well — 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% 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
- Low strength — 335 MPa (48.6 ksi), worse than 77% of steel grades
HC300LA properties
Typical room-temperature values for HC300LA-CR; bars are the position among steel grades.
Physical3
HC300LA has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,495°C (2,723 °F).
Mechanical12
HC300LA has a yield strength of 335 MPa (48.6 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 77% of steel grades. Elongation at break is 28% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
HC300LA is rated for continuous service to 300°C (572 °F). It conducts heat at 48 W/m·K (27.7 BTU/hr·ft·°F), better than 79% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
HC300LA conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of HC300LA takes about 25 MJ of energy and emits 2.1 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability6
HC300LA's machinability is good (55/100, better than 62% of steel grades); weldability excellent (88/100); formability good (68/100).
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. HC300LA is highlighted; hover a dot for its name, or open the interactive family chart.
Working with HC300LA
Is HC300LA easy to machine?
Rarely machined as sheet; blanking, laser and fine-piercing are preferred — allow larger punch clearance and expect higher blanking loads than DC04.
Can HC300LA be welded?
Excellent for resistance spot, MAG and laser welding thanks to low carbon and CEV; zinc-coated variants need ventilation, higher weld current and gap control.
Can HC300LA be formed, bent or molded?
Good deep-draw and stretch behaviour (n90 ≥ 0.16) but noticeably higher springback than mild steel — compensate die radii and use overbend/post-stretch.
HC300LA 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 |
|---|---|---|
| CEN 10268 max | ≤ 0.1 | 0.06 |
| Si | ≤ 0.5 | 0.1 |
| Mn | ≤ 1 | 0.6 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Altotal Al, min | ≥ 0.02 | 0.04 |
| Nbmicro-alloying | ≤ 0.09 | 0.03 |
| Timicro-alloying | ≤ 0.15 | 0.02 |
| Fe | balance |
What surface finishes work on HC300LA?
Bare sheet must be phosphated and e-coated or painted quickly; zinc coatings (+ZE/+Z/+ZF/+ZM) take standard automotive paint systems and are readily adhesive-bonded.
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 HC300LA cost?
HC300LA is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
HC300LA — frequently asked
What is HC300LA used for?
HC300LA is typically used for automotive structural parts, reinforcement panels and chassis brackets. In short: higher-strength HSLA sheet; good spot-weld response; stronger than HC260LA.
What is the yield strength of HC300LA?
HC300LA has a typical yield strength of 335 MPa (48.6 ksi) and a tensile strength of 420 MPa (60.9 ksi) — weaker than 77% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is HC300LA easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Rarely machined as sheet; blanking, laser and fine-piercing are preferred — allow larger punch clearance and expect higher blanking loads than DC04.
Can HC300LA be welded?
Yes — weldability is rated excellent (88/100). Excellent for resistance spot, MAG and laser welding thanks to low carbon and CEV; zinc-coated variants need ventilation, higher weld current and gap control.
What surface finishes work on HC300LA?
Bare sheet must be phosphated and e-coated or painted quickly; zinc coatings (+ZE/+Z/+ZF/+ZM) take standard automotive paint systems and are readily adhesive-bonded.
Can HC300LA be formed, bent or molded?
Good deep-draw and stretch behaviour (n90 ≥ 0.16) but noticeably higher springback than mild steel — compensate die radii and use overbend/post-stretch.
What is the maximum service temperature of HC300LA?
HC300LA is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does HC300LA cost?
HC300LA is a budget-cost steel ($), 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
- EN 10268 — Cold rolled steel flat products with high yield strength for cold forming — CEN (2013)
- EN 10346 — Continuously hot-dip coated steel flat products for cold forming — CEN (2015)
- EN 10152 — Electrolytically zinc coated cold rolled steel flat products — CEN (2017)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- HSLA cold-rolled and coated automotive steel product data — ArcelorMittal / thyssenkrupp Steel (2023)
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.