Steel 08F
08F is a rimmed (non-killed) low-carbon sheet steel for simple stampings and cold-formed parts, available cold rolled annealed or full hard, hot rolled, normalized, cold drawn and carburized.
Reference datasheet — 08F 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-Annealed condition
08F tempers and conditions
08F is supplied in 6 conditions, soft to hard. CR-Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot rolled | Pick hot rolled stock for thicker or low-cosmetic parts at the lowest price; accept mill scale, wide dimensional tolerances and the lower 195 MPa yield strength. | 195 | 320 | 38 | 110 HB | 12 % IACS |
CR-AnnealedDefault cold rolled, annealed sheet/strip | Use this cold rolled, annealed and skin-passed sheet as the default for general stampings, bends and enclosures, where 36 % elongation and a clean surface matter more than strength. | 200 | 330 | 36 | 105 HB | 12 % IACS |
900–930 °C, air cooled | Specify normalizing at 900–930 °C with air cooling to refine grain and remove rolling banding when a uniform structure is needed, including as pre-treatment before carburizing. | 205 | 335 | 37 | 110 HB | 12 % IACS |
case hardened 0.3–0.8 mm | Use carburizing and quenching to a 0.3–0.8 mm case at 59 HRC for small wear parts; the core stays soft low-strength steel and the part can no longer be formed. | 320 | 500 | 12 | 59 HRC | 11 % IACS |
Cold drawn | Pick cold drawn bar or wire for rivets, pins and cold-headed parts that need tight tolerances, good surface and 450 MPa tensile, accepting elongation reduced to 15 %. | 370 | 450 | 15 | 140 HB | 11.5 % IACS |
cold rolled, as-rolled ( / ) | Choose cold rolled, as-rolled strip for flat blanks or as a galvanizing substrate needing 540 MPa tensile; at 4 % elongation it is hard and brittle, so no forming or tight bends. | 480 | 540 | 4 | 165 HB | 11.5 % IACS |
What is 08F?
08F is a rimmed (non-killed) low-carbon sheet steel for simple stampings and cold-formed parts, available cold rolled annealed or full hard, hot rolled, normalized, cold drawn and carburized. It is the economy option where 200 MPa yield, 330 MPa tensile, 36 % elongation and 105 HB (55 HRB) are sufficient, and it cold bends, headers and draws acceptably (formability score 88). Subsurface porosity and segregation from rimmed practice make mirror polishing and decorative plating inconsistent, and strain ageing produces Lueders bands, so aluminium-killed 08Al or DC03 is preferred for demanding drawn panels. 08F 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). 08F has a yield strength of 200 MPa (29 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 98% of steel grades. Elongation at break is 36% and the elastic modulus is 210 GPa (30.5 Msi).
What is 08F used for?
- simple stampings
- enclosures
- low-cost sheet metal parts
Advantages
- Conducts heat well — 60 W/m·K (34.7 BTU/hr·ft·°F), better than 100% of steel grades
- High electrical conductivity — 12 % IACS, better than 99% of steel grades
- Ductile — tolerates forming and impact — 36%, better than 98% of steel grades
- Forms and bends easily — 88/100, better than 98% of steel grades
- Readily welded — 95/100, better than 97% of steel grades
Limitations
- Low strength — 200 MPa (29 ksi), worse than 98% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
08F properties
Typical room-temperature values for 08F-CR-Annealed; bars are the position among steel grades.
Physical3
08F 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).
Mechanical16
08F has a yield strength of 200 MPa (29 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 98% of steel grades. Elongation at break is 36% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
08F is rated for continuous service to 400°C (752 °F). It conducts heat at 60 W/m·K (34.7 BTU/hr·ft·°F), better than 100% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
08F conducts electricity at 12 % IACS, better than 99% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of 08F takes about 25 MJ of energy and emits 2.1 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 20%.
Manufacturability7
08F's machinability is fair (45/100, worse than 65% of steel grades); weldability excellent (95/100); formability excellent (88/100).
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. 08F is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 08F
Is 08F easy to machine?
Soft low-carbon steel smears and raises burrs; use sharp high-positive-rake tools, high speed and plenty of coolant. For automatic turning of small parts switch to a free-machining steel such as Y12 or 1215.
Can 08F be welded?
Carbon equivalent is very low, so resistance spot, CO2 gas-shielded MAG, submerged arc and brazing all run without preheat or post-weld heat treatment. Rimmed steel is slightly more porosity-prone, so use a deoxidised wire such as ER70S-6.
Can 08F be formed, bent or molded?
Cold bending, deep drawing and cold heading are good, but strain ageing causes Lueders bands and stretcher strains; skin-pass before stamping and use the material promptly. For demanding deep-drawn parts switch to 08Al or DC03.
08F 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 |
|---|---|---|
| CGB/T 699 | 0.05 – 0.11 | 0.08 |
| Sirimmed steel, not silicon-deoxidized | ≤ 0.03 | 0.02 |
| Mn | 0.25 – 0.5 | 0.38 |
| Pimpurity | ≤ 0.04 | 0.02 |
| Simpurity | ≤ 0.04 | 0.02 |
| Crresidual element | ≤ 0.1 | 0.05 |
| Niresidual element | ≤ 0.3 | 0.1 |
| Curesidual element | ≤ 0.25 | 0.1 |
| Fe | balance |
What surface finishes work on 08F?
Surface protection is required: zinc or nickel electroplating, phosphating, hot-dip galvanizing, or e-coat plus paint. Subsurface porosity and segregation make mirror polishing and high-decorative plating unreliable.
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 08F cost?
08F 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.
08F — frequently asked
What is 08F used for?
08F is typically used for simple stampings, enclosures and low-cost sheet metal parts. In short: lowest-cost stamping steel; largely superseded by killed steels; very low carbon equivalent.
What is the yield strength of 08F?
08F has a typical yield strength of 200 MPa (29 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 98% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is 08F easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 65% of steel grades). Soft low-carbon steel smears and raises burrs; use sharp high-positive-rake tools, high speed and plenty of coolant. For automatic turning of small parts switch to a free-machining steel such as Y12 or 1215.
Can 08F be welded?
Yes — weldability is rated excellent (95/100). Carbon equivalent is very low, so resistance spot, CO2 gas-shielded MAG, submerged arc and brazing all run without preheat or post-weld heat treatment. Rimmed steel is slightly more porosity-prone, so use a deoxidised wire such as ER70S-6.
What surface finishes work on 08F?
Surface protection is required: zinc or nickel electroplating, phosphating, hot-dip galvanizing, or e-coat plus paint. Subsurface porosity and segregation make mirror polishing and high-decorative plating unreliable.
Can 08F be formed, bent or molded?
Cold bending, deep drawing and cold heading are good, but strain ageing causes Lueders bands and stretcher strains; skin-pass before stamping and use the material promptly. For demanding deep-drawn parts switch to 08Al or DC03.
What is the maximum service temperature of 08F?
08F is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 08F CR-Annealed and 08F-CD?
CR-Annealed is the default condition — use this cold rolled, annealed and skin-passed sheet as the default for general stampings, bends and enclosures, where 36 % elongation and a clean surface matter more than strength. CD: pick cold drawn bar or wire for rivets, pins and cold-headed parts that need tight tolerances, good surface and 450 MPa tensile, accepting elongation reduced to 15 %. Yield strength is 200 MPa in CR-Annealed versus 370 MPa in CD.
How much does 08F cost?
08F 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
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels — ASM International (1990)
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.