Steel A1011
ASTM A1011 · JIS SPHC
A1011 is the ASTM specification for hot-rolled carbon steel sheet and strip, covering commercial quality (CS-A/B/C), drawing quality (DS-A/B), structural quality (SS-30 through SS-80), HSLAS and HSLAS-F 45-80, and UHSS-90 through UHSS-130 in one standard family.
Reference datasheet — A1011 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
A1011 tempers and conditions
A1011 is supplied in 37 conditions, soft to hard. CS-B is the default FabDigit quotes; the values on this page are for it.
- DS-B
- DS-A
- SS-30
- CS-B
- CS-A
- CS-C
- SS-33
- SS-36-T1
- SS-36-T2
- SS-40
- HSLAS-45-C2
- SS-45
- HSLAS-45-C1
- HSLAS-50-C2
- HSLAS-F-50
- SS-50
- HSLAS-50-C1
- HSLAS-55-C2
- SS-55
- HSLAS-55-C1
- HSLAS-60-C2
- HSLAS-F-60
- SS-60
- HSLAS-60-C1
- HSLAS-65-C2
- HSLAS-65-C1
- HSLAS-70-C2
- HSLAS-F-70
- SS-70
- HSLAS-70-C1
- SS-80
- HSLAS-F-80
- UHSS-90
- UHSS-100
- UHSS-110
- UHSS-120
- UHSS-130
Compare all 37 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
DS Type B | Non-aging drawing sheet for parts stamped long after coil delivery or needing consistent springback. | 215 | 335 | 38 | 98 HB | 11.3 % IACS |
DS Type A | Choose for deeper draws and severe bends where CS ductility is marginal. | 220 | 340 | 36 | 100 HB | 11.2 % IACS |
SS Grade 30 | Lowest structural grade with guaranteed yield/tensile/elongation for light framing and brackets. | 240 | 370 | 30 | 110 HB | 10.8 % IACS |
CS-BDefault CS Type B | The default stocked hot-rolled commercial sheet: lowest-carbon CS type, best weldability and bending of the CS family. | 250 | 365 | 30 | 110 HB | 10.8 % IACS |
CS Type A | General-purpose hot-rolled sheet where mild bending and moderate forming are needed and no mechanical minimums are critical. | 255 | 370 | 30 | 112 HB | 10.8 % IACS |
CS Type C | Economy commercial sheet for flat or lightly formed parts where higher phosphorus/sulfur is tolerable. | 260 | 375 | 27 | 115 HB | 10.5 % IACS |
SS Grade 33 | Light structural sheet one step above Grade 30 with the same easy fabrication. | 265 | 390 | 28 | 116 HB | 10.6 % IACS |
SS Grade 36 Type 1 | Most common structural hot-rolled sheet grade, the sheet analogue of A36 plate. | 290 | 400 | 27 | 120 HB | 10.5 % IACS |
SS Grade 36 Type 2 | Grade 36 with a higher tensile floor, used where bolted/riveted joint strength governs. | 300 | 435 | 25 | 128 HB | 10.8 % IACS |
SS Grade 40 | Mid structural grade for purlins, decking and light frames. | 315 | 415 | 25 | 125 HB | 10.8 % IACS |
HSLAS Grade 45 Class 2 | Class 2 trades a slightly lower tensile floor for extra elongation and formability. | 345 | 440 | 28 | 132 HB | 9.6 % IACS |
SS Grade 45 | Higher-strength carbon structural sheet where section thickness must be trimmed. | 350 | 450 | 23 | 135 HB | 10.7 % IACS |
HSLAS Grade 45 Class 1 | Microalloyed sheet giving 45 ksi yield with better toughness and weldability than carbon SS 45. | 350 | 450 | 26 | 135 HB | 9.5 % IACS |
HSLAS Grade 50 Class 2 | Pick when 50 ksi yield must be combined with roll-forming or moderate stamping. | 380 | 470 | 26 | 142 HB | 9.4 % IACS |
HSLAS-F Grade 50 | Low-sulfur, inclusion-shape-controlled HSLA for tight-radius bends and stretch flanging at 50 ksi. | 380 | 450 | 28 | 140 HB | 10 % IACS |
SS Grade 50 | Widely used 50 ksi carbon structural sheet for roll-formed framing and truck components. | 385 | 490 | 21 | 148 HB | 10.6 % IACS |
HSLAS Grade 50 Class 1 | Workhorse HSLA hot-rolled sheet for chassis, frames and trailer components. | 385 | 490 | 24 | 148 HB | 9.3 % IACS |
HSLAS Grade 55 Class 2 | 55 ksi HSLA with improved ductility for formed brackets and rails. | 420 | 500 | 24 | 152 HB | 9.2 % IACS |
SS Grade 55 | High-strength carbon structural sheet for weight-critical roll-formed sections. | 425 | 520 | 19 | 158 HB | 10.5 % IACS |
HSLAS Grade 55 Class 1 | Microalloyed 55 ksi sheet for weight reduction in welded structures. | 425 | 520 | 22 | 158 HB | 9.1 % IACS |
HSLAS Grade 60 Class 2 | 60 ksi yield with the best available ductility in that strength band. | 450 | 525 | 22 | 160 HB | 9.1 % IACS |
HSLAS-F Grade 60 | 60 ksi HSLA with formability enhancement for stamped chassis parts. | 450 | 520 | 26 | 158 HB | 9.8 % IACS |
SS Grade 60 | Carbon structural sheet at 60 ksi yield; forming radii must be generous. | 455 | 545 | 16 | 165 HB | 10.4 % IACS |
HSLAS Grade 60 Class 1 | 60 ksi HSLA sheet for high-load welded members with limited forming. | 455 | 560 | 20 | 170 HB | 9 % IACS |
HSLAS Grade 65 Class 2 | 65 ksi HSLA tuned for roll forming rather than maximum tensile. | 490 | 560 | 20 | 172 HB | 9.5 % IACS |
HSLAS Grade 65 Class 1 | Upper-mid HSLA grade for lightweight truck and equipment frames. | 495 | 590 | 18 | 180 HB | 9.5 % IACS |
HSLAS Grade 70 Class 2 | 70 ksi yield with relaxed tensile floor for better bending performance. | 520 | 595 | 18 | 180 HB | 9.3 % IACS |
HSLAS-F Grade 70 | High-strength formable HSLA for stamped suspension and frame reinforcements. | 520 | 590 | 23 | 178 HB | 9.5 % IACS |
SS Grade 70 | High-yield carbon structural sheet for lightly formed high-load parts. | 525 | 605 | 13 | 185 HB | 10.2 % IACS |
HSLAS Grade 70 Class 1 | Highest standard HSLAS grade; use for maximum strength-to-weight with simple bends. | 525 | 630 | 16 | 190 HB | 9.3 % IACS |
SS Grade 80 | Highest SS grade; near-flat or simple-bend parts only, elongation not guaranteed. | 590 | 640 | 10 | 195 HB | 10.1 % IACS |
HSLAS-F Grade 80 | Top HSLAS-F grade; best combination of 80 ksi yield and bendability. | 590 | 660 | 20 | 200 HB | 9.2 % IACS |
UHSS Grade 90 | Entry ultra-high-strength hot-rolled sheet for light-weighting where forming is simple. | 660 | 730 | 12 | 19 HRC | 9.2 % IACS |
UHSS Grade 100 | Use where 100 ksi yield allows a thinner gauge and welding heat input is controlled. | 730 | 800 | 11 | 22 HRC | 9 % IACS |
UHSS Grade 110 | High-strength gauge-reduction grade for cranes, trailers and structural tubing. | 800 | 870 | 10 | 25 HRC | 8.8 % IACS |
UHSS Grade 120 | Near-top UHSS grade; requires large bend radii and low-hydrogen welding practice. | 870 | 940 | 9 | 28 HRC | 8.6 % IACS |
UHSS Grade 130 | Highest A1011 strength level; essentially a flat/lightly formed structural sheet. | 940 | 1,010 | 8 | 30 HRC | 8.4 % IACS |
What is A1011?
A1011 is the ASTM specification for hot-rolled carbon steel sheet and strip, covering commercial quality (CS-A/B/C), drawing quality (DS-A/B), structural quality (SS-30 through SS-80), HSLAS and HSLAS-F 45-80, and UHSS-90 through UHSS-130 in one standard family. It is the lowest-cost widely stocked flat steel for stampings, roll-formed sections and welded fabrication, supplied as coil, sheet and slit strip. The default condition gives 250 MPa yield, 365 MPa tensile, 30 % elongation and about 110 HB (62 HRB) with weldability rated 95. Bare surfaces rust and mill scale must be removed before coating; for deep-drawn shapes use cold-rolled DS or DC-grade sheet. A1011 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). A1011 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 365 MPa (52.9 ksi) — weaker than 94% of steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
What is A1011 used for?
- stamped parts
- structural brackets
- tube skelp
- general fabrication
Advantages
- Readily welded — 95/100, better than 97% of steel grades
- High electrical conductivity — 10.8 % IACS, better than 94% of steel grades
- Forms and bends easily — 82/100, better than 94% of steel grades
- Ductile — tolerates forming and impact — 30%, better than 93% of steel grades
- Conducts heat well — 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades
Limitations
- Hard to polish — 40/100, worse than 96% of steel grades
- Low strength — 250 MPa (36.3 ksi), worse than 94% of steel grades
A1011 properties
Typical room-temperature values for A1011-CS-B; bars are the position among steel grades.
Physical3
A1011 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
A1011 has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 365 MPa (52.9 ksi) — weaker than 94% of steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
A1011 is rated for continuous service to 400°C (752 °F). It conducts heat at 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
A1011 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 A1011 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
A1011's machinability is good (60/100, better than 83% of steel grades); weldability excellent (95/100); formability very good (82/100).
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. A1011 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A1011
Is A1011 easy to machine?
Cuts easily but is gummy — sharp tools, positive rake and good chip evacuation; deburr and expect mill scale to be abrasive on the first pass.
Can A1011 be welded?
Excellent with GMAW/GTAW/RSW/laser; CS and DS need no preheat, HSLAS and UHSS grades require low-hydrogen consumables and controlled heat input to avoid HAZ softening.
Can A1011 be formed, bent or molded?
CS/DS shear, punch, roll-form and stamp readily; allow larger bend radii and higher springback compensation as you move up SS/HSLAS/UHSS strength levels.
A1011 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 ≤0.15; DS ≤0.10; SS/HSLAS/UHSS grades up to 0.25 depending on designation | ≤ 0.25 | 0.1 |
| MnCS/DS ≤0.60; SS ≤1.35; HSLAS/UHSS up to 1.65 | ≤ 1.65 | 0.55 |
| PCS Type C and some SS grades allow higher (up to 0.10 for rephosphorized options) | ≤ 0.04 | 0.02 |
| SHSLAS-F limited to ≤0.015 for formability | ≤ 0.04 | 0.01 |
| Sinot specified for CS/DS; limited for SS/HSLAS | ≤ 0.6 | 0.05 |
| Alkilled/stabilized grades (DS Type A, HSLAS-F) | 0.02 – 0.2 | 0.03 |
| Cu0.20 min only when copper-bearing steel is specified | ≥ 0.2 | 0.2 |
| Nbmicroalloying in HSLAS/HSLAS-F/UHSS | ≤ 0.1 | 0.03 |
| Vmicroalloying in HSLAS/UHSS | ≤ 0.15 | 0.05 |
| Timicroalloying / stabilization | ≤ 0.15 | 0.02 |
| Nas-produced | ≤ 0.01 | |
| Fe | balance |
What surface finishes work on A1011?
Descale (pickle/blast) then phosphate + paint, powder coat, e-coat or hot-dip galvanize; bare A1011 rusts within days in humid storage.
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 A1011 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- JIS
- SPHC
How much does A1011 cost?
A1011 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.
A1011 — frequently asked
What is A1011 used for?
A1011 is typically used for stamped parts, structural brackets, tube skelp and general fabrication. In short: widest strength range hot-rolled; cheapest stamping-grade steel; excellent weldability, score 95.
What is the yield strength of A1011?
A1011 has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 365 MPa (52.9 ksi) — weaker than 94% of steel grades. Strength varies by condition: see the 37 listed tempers.
Is A1011 easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Cuts easily but is gummy — sharp tools, positive rake and good chip evacuation; deburr and expect mill scale to be abrasive on the first pass.
Can A1011 be welded?
Yes — weldability is rated excellent (95/100). Excellent with GMAW/GTAW/RSW/laser; CS and DS need no preheat, HSLAS and UHSS grades require low-hydrogen consumables and controlled heat input to avoid HAZ softening.
What surface finishes work on A1011?
Descale (pickle/blast) then phosphate + paint, powder coat, e-coat or hot-dip galvanize; bare A1011 rusts within days in humid storage.
Can A1011 be formed, bent or molded?
CS/DS shear, punch, roll-form and stamp readily; allow larger bend radii and higher springback compensation as you move up SS/HSLAS/UHSS strength levels.
What is the maximum service temperature of A1011?
A1011 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 A1011 CS-B and A1011 UHSS-90?
CS-B is the default condition — the default stocked hot-rolled commercial sheet: lowest-carbon CS type, best weldability and bending of the CS family. UHSS-90: entry ultra-high-strength hot-rolled sheet for light-weighting where forming is simple. Yield strength is 250 MPa in CS-B versus 660 MPa in UHSS-90.
How much does A1011 cost?
A1011 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 A1011/A1011M — Standard Specification for Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, HSLA, HSLA with Improved Formability, and UHSS — ASTM International (2018)
- ASTM A1018/A1018M — Hot-Rolled Heavy-Thickness Coils — ASTM International (2018)
- JIS G 3131 SPHC / GB/T 912, GB/T 3274 (Q235B ) — JISC / SAC (2017)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- AISI/SSINA Sheet Steel Design and Product Manuals — AISI / Steel Market Development Institute (2013)
- Mysteel / hot-rolled coil and sheet quotations — Mysteel / SMM (2026)
- OnlineMetals / Midwest Steel & Aluminum small-lot HR sheet pricing — distributors (2026)
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.