Steel A1008
ASTM A1008 · JIS SPCC
ASTM A1008 is the US specification for cold-rolled carbon steel sheet, covering commercial (CS), drawing (DS, DDS, EDDS), structural (SS 25–80), high-strength low-alloy (HSLAS, HSLAS-F), bake-hardenable (BHS 180–280) and UHSS designations; it is the American counterpart to SPCC/DC01.
Reference datasheet — A1008 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 CS-B condition
A1008 tempers and conditions
A1008 is supplied in 31 conditions, soft to hard. CS-B is the default FabDigit quotes; the values on this page are for it.
- EDDS
- DDS
- DS-B
- DS-A
- SS-25
- BHS-180
- CS-C
- BHS-210
- CS-B
- SS-30
- CS-A
- SS-33
- BHS-240
- SS-40
- BHS-280
- SS-45
- HSLAS-45
- SS-50
- HSLAS-50
- HSLAS-F-50
- HSLAS-55
- HSLAS-60
- HSLAS-F-60
- SS-60
- HSLAS-65
- HSLAS-70
- HSLAS-F-70
- SS-70
- HSLAS-F-80
- SS-80
- UHSS
Compare all 31 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Extra deep drawing steel | IF steel for the most severe automotive/appliance draws; highest r-value and no aging. | 160 | 290 | 45 | 78 HB | 12 % IACS |
Deep drawing steel | Deep cups, appliance shells and severe draws where DS still splits. | 180 | 300 | 42 | 82 HB | 11.5 % IACS |
DS Type B | Drawing quality with non-aging behaviour — use when coils are stored before stamping. | 195 | 305 | 41 | 86 HB | 11.2 % IACS |
DS Type A | For parts that fail in CS because of moderate draws or tight radii. | 200 | 310 | 40 | 88 HB | 11 % IACS |
SS Grade 25 [170] | Lightly loaded structural sheet where a guaranteed minimum yield is required. | 200 | 320 | 30 | 98 HB | 10.8 % IACS |
BHS Grade 180 [26] | Soft for stamping, then gains ~30–40 MPa yield during paint bake — outer body panels. | 200 | 310 | 34 | 88 HB | 10.8 % IACS |
CS Type C | Choose when a slightly softer, cleaner-surface commercial sheet is needed for painting or light drawing. | 230 | 320 | 39 | 92 HB | 11 % IACS |
BHS Grade 210 [30] | Dent-resistance upgrade for skin panels with the same tooling as DDS. | 230 | 335 | 32 | 95 HB | 10.6 % IACS |
CS-BDefault CS Type B | The default stocked cold-rolled commercial sheet — best balance of price, weldability and moderate drawing. | 240 | 330 | 38 | 95 HB | 10.8 % IACS |
SS Grade 30 [205] | Entry structural grade for brackets and frames with modest forming. | 240 | 340 | 28 | 102 HB | 10.8 % IACS |
CS Type A | General sheet-metal work with mild bending/forming; standard carbon-killed commercial quality. | 250 | 340 | 36 | 98 HB | 10.8 % IACS |
SS Grade 33 [230] | Common light-structural grade; Type 2 has tighter chemistry limits for welding. | 265 | 360 | 26 | 107 HB | 10.8 % IACS |
BHS Grade 240 [35] | Higher-strength bake-hardenable panel steel for thinner gauges. | 265 | 365 | 30 | 105 HB | 10.4 % IACS |
SS Grade 40 [275] | Mid-strength structural sheet for shelving, panels and light framing. | 305 | 390 | 24 | 116 HB | 10.8 % IACS |
BHS Grade 280 [40] | Top bake-hardenable grade — max dent resistance after paint bake. | 305 | 400 | 28 | 115 HB | 10.2 % IACS |
SS Grade 45 [310] | Higher-strength structural sheet where weight saving matters more than draw depth. | 340 | 415 | 20 | 125 HB | 10.8 % IACS |
HSLAS Grade 45 [310] Class 1/2 | Nb/Ti/V microalloyed sheet giving SS-45 strength with much better bending and toughness; Class 2 trades tensile for formability. | 345 | 450 | 24 | 130 HB | 9.5 % IACS |
SS Grade 50 [340] | Strength-driven roll-formed sections and load-bearing panels. | 375 | 450 | 17 | 137 HB | 10.8 % IACS |
HSLAS Grade 50 [340] Class 1/2 | Most common HSLA cold-rolled grade for automotive brackets and reinforcements. | 375 | 480 | 22 | 140 HB | 9.5 % IACS |
HSLAS-F Grade 50 [340] | Sulphide-shape-controlled HSLA for deep-drawn high-strength parts. | 375 | 460 | 26 | 135 HB | 9.5 % IACS |
HSLAS Grade 55 [380] Class 1/2 | Step-up strength for weight reduction while keeping ~18–20 % elongation. | 415 | 510 | 19 | 150 HB | 9.3 % IACS |
HSLAS Grade 60 [410] Class 1/2 | High-strength stampings where SS-60 would crack at the bend radii. | 445 | 545 | 17 | 160 HB | 9.3 % IACS |
HSLAS-F Grade 60 [410] | 410 MPa yield with drawing-grade bendability for complex stampings. | 445 | 520 | 23 | 155 HB | 9.3 % IACS |
SS Grade 60 [410] | Cold-work-strengthened structural sheet for simple bends only. | 450 | 510 | 10 | 155 HB | 10.5 % IACS |
HSLAS Grade 65 [450] Class 1/2 | Structural reinforcements needing 450 MPa yield with usable ductility. | 485 | 580 | 15 | 172 HB | 9.2 % IACS |
HSLAS Grade 70 [480] Class 1/2 | Top conventional HSLA grade in A1008 — maximum strength before HSLAS-F/UHSS. | 515 | 620 | 13 | 185 HB | 9.2 % IACS |
HSLAS-F Grade 70 [480] | 480 MPa yield stampings with tight radii and good hole expansion. | 515 | 590 | 20 | 9 HRC | 9.5 % IACS |
SS Grade 70 [480] | High-strength flat or lightly formed parts, typically temper-rolled to strength. | 520 | 560 | 6 | 170 HB | 10.5 % IACS |
HSLAS-F Grade 80 [550] | Highest HSLAS-F grade; chassis and seat structures needing 550 MPa yield plus formability. | 590 | 660 | 18 | 14 HRC | 9.3 % IACS |
SS Grade 80 [550] | Full-hard sheet for flat, high-strength, essentially non-formed applications (e.g. deck, strapping). | 610 | 640 | 2 | 195 HB | 10.5 % IACS |
Ultra-high-strength (martensitic) cold-rolled sheet | Quenched martensitic sheet for intrusion beams, bumpers and roll-formed profiles; essentially no drawability and needs careful welding. | 900 | 1,100 | 5 | 38 HRC | — |
What is A1008?
ASTM A1008 is the US specification for cold-rolled carbon steel sheet, covering commercial (CS), drawing (DS, DDS, EDDS), structural (SS 25–80), high-strength low-alloy (HSLAS, HSLAS-F), bake-hardenable (BHS 180–280) and UHSS designations; it is the American counterpart to SPCC/DC01. Engineers order it as coil, sheet and blanks and select the quality level by draw severity or required yield, with 240 MPa yield, 330 MPa tensile and 38 % elongation typical of the default condition. Bare sheet has no corrosion resistance, and the higher SS/HSLAS/UHSS grades trade formability for strength. Use A1011 hot-rolled sheet where cold-rolled surface and gauge tolerance are not needed. A1008 has a density of 7.87 g/cm³ (0.284 lb/in³), heavier than 92% of steel grades. It melts at 1,495°C (2,723 °F). A1008 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 96% of steel grades. Elongation at break is 38% and the elastic modulus is 200 GPa (29 Msi).
What is A1008 used for?
- stamped brackets
- enclosures
- automotive parts
- appliance panels
Advantages
- Ductile — tolerates forming and impact — 38%, 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
- Conducts heat well — 51.9 W/m·K (30 BTU/hr·ft·°F), better than 96% of steel grades
- High electrical conductivity — 10.8 % IACS, better than 94% of steel grades
Limitations
- Low strength — 240 MPa (34.8 ksi), worse than 96% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
A1008 properties
Typical room-temperature values for A1008-CS-B; bars are the position among steel grades.
Physical3
A1008 has a density of 7.87 g/cm³ (0.284 lb/in³), heavier than 92% of steel grades. It melts at 1,495°C (2,723 °F).
Mechanical16
A1008 has a yield strength of 240 MPa (34.8 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 96% of steel grades. Elongation at break is 38% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
A1008 is rated for continuous service to 400°C (752 °F). It conducts heat at 51.9 W/m·K (30 BTU/hr·ft·°F), better than 96% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
A1008 conducts electricity at 10.8 % IACS, better than 94% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of A1008 takes about 27 MJ of energy and emits 2.3 kg of CO₂ — less than 59% of steel grades. Typical recycled content is 25%.
Manufacturability7
A1008's machinability is good (55/100, better than 62% 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. A1008 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A1008
Is A1008 easy to machine?
Soft and gummy — sharp tools, positive rake and good chip evacuation; blanking, laser and punching are the normal 'machining' routes for this thin sheet.
Can A1008 be welded?
Excellent for RSW, MIG, TIG and laser with ER70S-x filler; no preheat or PWHT needed on CS/DS/DDS, but UHSS and high HSLAS grades need controlled heat input to limit HAZ softening.
Can A1008 be formed, bent or molded?
Cold forming is the primary process — pick CS for bends, DS/DDS/EDDS as draw severity rises; watch stretcher strains/aging in non-killed CS and allow for springback in SS/HSLAS grades.
A1008 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 |
|---|---|---|
| CCS Type B; DDS/EDDS much lower (≤0.02 C, IF steels ≤0.01) | 0.02 – 0.15 | 0.06 |
| Mnup to 1.65 in SS/HSLAS grades | ≤ 0.6 | 0.35 |
| P | ≤ 0.03 | 0.01 |
| S≤0.015 for HSLAS-F | ≤ 0.04 | 0.01 |
| Alaluminium-killed sheet | 0.01 – 0.1 | 0.04 |
| Cu0.20 min if copper-bearing ordered | ≤ 0.2 | 0.05 |
| Niunspecified-element limit | ≤ 0.2 | 0.02 |
| Crunspecified-element limit | ≤ 0.15 | 0.03 |
| Mounspecified-element limit | ≤ 0.06 | 0.01 |
| Nbmicroalloy addition in HSLAS/HSLAS-F only | ≤ 0.1 | |
| TiIF (EDDS) stabilisation and HSLAS microalloying | ≤ 0.15 | |
| VHSLAS microalloying | ≤ 0.1 | |
| Fe | balance |
What surface finishes work on A1008?
Bare sheet must be protected: zinc/zinc-nickel plating, hot-dip galvanizing, zinc phosphate + e-coat, powder coat or oiling; it takes paint well after alkaline clean and phosphate.
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 A1008 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- JIS
- SPCC
How much does A1008 cost?
A1008 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.
A1008 — frequently asked
What is A1008 used for?
A1008 is typically used for stamped brackets, enclosures, automotive parts and appliance panels. In short: broadest US sheet spec; grades from EDDS to UHSS; SPCC/DC01 counterpart.
What is the yield strength of A1008?
A1008 has a typical yield strength of 240 MPa (34.8 ksi) and a tensile strength of 330 MPa (47.9 ksi) — weaker than 96% of steel grades. Strength varies by condition: see the 31 listed tempers.
Is A1008 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Soft and gummy — sharp tools, positive rake and good chip evacuation; blanking, laser and punching are the normal 'machining' routes for this thin sheet.
Can A1008 be welded?
Yes — weldability is rated excellent (95/100). Excellent for RSW, MIG, TIG and laser with ER70S-x filler; no preheat or PWHT needed on CS/DS/DDS, but UHSS and high HSLAS grades need controlled heat input to limit HAZ softening.
What surface finishes work on A1008?
Bare sheet must be protected: zinc/zinc-nickel plating, hot-dip galvanizing, zinc phosphate + e-coat, powder coat or oiling; it takes paint well after alkaline clean and phosphate.
Can A1008 be formed, bent or molded?
Cold forming is the primary process — pick CS for bends, DS/DDS/EDDS as draw severity rises; watch stretcher strains/aging in non-killed CS and allow for springback in SS/HSLAS grades.
What is the maximum service temperature of A1008?
A1008 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 A1008 CS-B and A1008 UHSS?
CS-B is the default condition — the default stocked cold-rolled commercial sheet — best balance of price, weldability and moderate drawing. UHSS: quenched martensitic sheet for intrusion beams, bumpers and roll-formed profiles; essentially no drawability and needs careful welding. Yield strength is 240 MPa in CS-B versus 900 MPa in UHSS.
How much does A1008 cost?
A1008 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
- ASTM A1008/A1008M Standard Specification for Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake Hard — ASTM International (2021)
- JIS G 3141 Cold-reduced carbon steel sheets and strip (SPCC/SPCD/SPCE) — JISC (2021)
- EN 10130 Cold rolled low carbon steel flat products for cold forming (DC01–DC06) — CEN (2006)
- ASM Handbook Vol.1: Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.14B: Metalworking — Sheet Forming — ASM International (2006)
- Cold Rolled Steel Product Guides (CS/DS/DDS/EDDS, HSLAS, BH grades) — Cleveland-Cliffs / U.S. Steel / Nucor (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.