Steel 1112
AISI/SAE 1112 · UNS G11120
1112 is a classic resulfurized free-machining carbon steel (UNS G11120) from the AISI/SAE 11xx family, relying on manganese sulfide inclusions rather than alloying for its cutting behaviour.
Reference datasheet — 1112 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 CD condition
1112 tempers and conditions
1112 is supplied in 6 conditions, soft to hard. CD 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 |
|---|---|---|---|---|---|---|
Annealed | Pick when maximum softness and dimensional stability after heavy machining or cold forming is needed. | 230 | 395 | 30 | 110 HB | 11 % IACS |
Hot rolled | Cheapest form for larger diameters or when full machining removes the scaled surface anyway. | 260 | 440 | 25 | 121 HB | — |
Normalized | Used to homogenize grain size before carburizing or after hot forging. | 275 | 450 | 27 | 130 HB | 10.5 % IACS |
Carburized & quenched | Choose when machined free-cutting parts need a wear-resistant case (typ. 0.2–0.6 mm, 55–62 HRC surface). | 400 | 620 | 15 | 58 HRC | 10 % IACS |
Cold drawn, stress relieved | Choose when parts machined asymmetrically from cold-drawn bar must stay straight. | 425 | 515 | 13 | 160 HB | 10.5 % IACS |
CDDefault Cold drawn | Standard stocked screw-machine bar: highest machinability, good size/straightness tolerance, no heat treatment needed. | 470 | 540 | 10 | 167 HB | — |
Supply forms, finishes and certifications
Ways 1112 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
TGP | TG&P | Surface finish |
What is 1112?
1112 is a classic resulfurized free-machining carbon steel (UNS G11120) from the AISI/SAE 11xx family, relying on manganese sulfide inclusions rather than alloying for its cutting behaviour. It is widely stocked for general screw-machine work, with default cold-drawn values of 470 MPa yield, 540 MPa tensile, 10% elongation and 167 HB (85 HRB) at a machinability score of 88, supplied as CD, HR, annealed, normalised, stress-relieved and TGP bar. High sulfur and phosphorus make it a poor welding grade and formability is limited (score 30); 1018 is the usual alternative when joints must be welded. 1112 has a density of 7.87 g/cm³ (0.284 lb/in³), heavier than 92% of steel grades. It melts at 1,425°C (2,597 °F). 1112 has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 540 MPa (78.3 ksi) — stronger than 57% of steel grades. Elongation at break is 10% and the elastic modulus is 200 GPa (29 Msi).
What is 1112 used for?
- Bolts
- Nuts
- Fittings
- General turned parts
Advantages
- Easy to machine — 88/100, better than 99% of steel grades
- Conducts heat well — 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades
- Low embodied carbon — 1.9 kg CO₂/kg, better than 92% of steel grades
- High electrical conductivity — 10.5 % IACS, better than 89% of steel grades
Limitations
- Limited ductility — 10%, worse than 91% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
- Difficult to weld — 25/100, worse than 77% of steel grades
1112 properties
Typical room-temperature values for 1112-CD; bars are the position among steel grades.
Physical3
1112 has a density of 7.87 g/cm³ (0.284 lb/in³), heavier than 92% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical13
1112 has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 540 MPa (78.3 ksi) — stronger than 57% of steel grades. Elongation at break is 10% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1112 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 11.9 µm/m·K (6.61 µin/in·°F).
Electrical3
1112 conducts electricity at 10.5 % IACS, better than 89% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (8/100), worse than 99% of steel grades.
Sustainability4
Producing a kilogram of 1112 takes about 25 MJ of energy and emits 1.9 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
1112's machinability is excellent (88/100, better than 99% of steel grades); weldability poor (25/100); formability poor (30/100).
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. 1112 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1112
Is 1112 easy to machine?
Benchmark free-cutting steel — high speeds, short broken chips, excellent tool life and surface finish on automatic lathes; light feeds can smear the soft matrix, so keep chip load positive.
Can 1112 be welded?
Poor: high sulfur and phosphorus promote hot cracking and porosity — avoid structural welds; if unavoidable use low-hydrogen filler, low heat input and preheat, or switch to 1018.
Can 1112 be formed, bent or molded?
Only light cold bending/upsetting; MnS stringers make transverse ductility low and cause splitting on tight bends — hot form above 900 °C instead.
1112 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 |
|---|---|---|
| Cmax only | ≤ 0.13 | 0.1 |
| Mn | 0.7 – 1 | 0.85 |
| Pintentionally added for chip breaking | 0.07 – 0.12 | 0.09 |
| Sresulfurized; forms MnS inclusions | 0.16 – 0.23 | 0.2 |
| Fe | balance |
What surface finishes work on 1112?
Not anodizable; protect with zinc or nickel plating, black oxide, phosphate + oil, or paint. Inclusions can leave micro-pits after polishing and cause plating pinholes, so pre-clean thoroughly.
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 1112 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- G11120
How much does 1112 cost?
1112 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.
1112 — frequently asked
What is 1112 used for?
1112 is typically used for bolts, nuts, fittings and general turned parts. In short: benchmark free-cutting bar; widely stocked 11xx grade; low transverse ductility.
What is the yield strength of 1112?
1112 has a typical yield strength of 470 MPa (68.2 ksi) and a tensile strength of 540 MPa (78.3 ksi) — stronger than 57% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is 1112 easy to machine?
Yes — machinability is rated excellent (88/100, better than 99% of steel grades). Benchmark free-cutting steel — high speeds, short broken chips, excellent tool life and surface finish on automatic lathes; light feeds can smear the soft matrix, so keep chip load positive.
Can 1112 be welded?
Not readily — weldability is rated poor (25/100). Poor: high sulfur and phosphorus promote hot cracking and porosity — avoid structural welds; if unavoidable use low-hydrogen filler, low heat input and preheat, or switch to 1018.
What surface finishes work on 1112?
Not anodizable; protect with zinc or nickel plating, black oxide, phosphate + oil, or paint. Inclusions can leave micro-pits after polishing and cause plating pinholes, so pre-clean thoroughly.
Can 1112 be formed, bent or molded?
Only light cold bending/upsetting; MnS stringers make transverse ductility low and cause splitting on tight bends — hot form above 900 °C instead.
What is the maximum service temperature of 1112?
1112 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 1112-CD and 1112-ANN?
CD is the default condition — standard stocked screw-machine bar: highest machinability, good size/straightness tolerance, no heat treatment needed. ANN: pick when maximum softness and dimensional stability after heavy machining or cold forming is needed. Yield strength is 470 MPa in CD versus 230 MPa in ANN.
How much does 1112 cost?
1112 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
- SAE J403 — Chemical Compositions of SAE Carbon Steels — SAE International (2014)
- ASTM A108 — Steel Bar, Carbon and Alloy, Cold-Finished — ASTM (2018)
- ASTM A576 — Steel Bars, Carbon, Hot-Wrought, Special Quality — ASTM (2017)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.16 — Machining (free-machining steel ratings) — ASM International (1989)
- GB/T 8731 (Y12 / Y15 equivalents) — SAC (2008)
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.