Steel 1120
AISI/SAE 1120 · UNS G11200
1120 (UNS G11200) is a resulfurized free-machining carbon steel from the AISI 11xx family, using manganese sulfide inclusions for chip breaking and carrying slightly more carbon than 1119 for moderate strength.
Reference datasheet — 1120 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
1120 tempers and conditions
1120 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 |
|---|---|---|---|---|---|---|
Solution annealed | Softest condition for heavy cold forming, heading or deep boring before hardening. | 220 | 395 | 30 | 111 HB | 10.8 % IACS |
Hot rolled | Lowest-cost bar for parts that will be fully machined or subsequently case hardened. | 240 | 435 | 26 | 126 HB | — |
Normalized | Uniform fine grain structure after forging; better toughness consistency than as-rolled. | 255 | 450 | 27 | 131 HB | 10.5 % IACS |
Cold Drawn, Stress Relieved | Pick when parts machine asymmetrically and residual-stress distortion must be minimised. | 360 | 455 | 18 | 137 HB | 10.5 % IACS |
CDDefault Cold drawn | Standard stocked condition: good size tolerance, straightness and the best chip control on screw machines. | 395 | 470 | 15.5 | 143 HB | — |
Carburized, Quenched and Tempered | Choose for wear surfaces: hard 0.3–1.0 mm case on a tough, machinable low-carbon core. | 400 | 620 | 14 | 60 HRC | — |
Supply forms, finishes and certifications
Ways 1120 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 | Turned, Ground and Polished | Surface finish |
What is 1120?
1120 (UNS G11200) is a resulfurized free-machining carbon steel from the AISI 11xx family, using manganese sulfide inclusions for chip breaking and carrying slightly more carbon than 1119 for moderate strength. It is standard high-volume screw-machine bar: cold-drawn material runs about 395 MPa yield, 470 MPa tensile, 15.5 % elongation, 143 HB (78 HRB) and a machinability score of 76. Sulfur is the limit — hot cracking in structural welds, splitting in tight transverse bends, and no corrosion resistance without plating. Move to 1215 or 12L14 for faster cutting, or 1141/1144 for higher strength. 1120 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F). 1120 has a yield strength of 395 MPa (57.3 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 63% of steel grades. Elongation at break is 15.5% and the elastic modulus is 200 GPa (29 Msi).
What is 1120 used for?
- Fittings
- Shafts
- Fasteners
Advantages
- Easy to machine — 76/100, better than 97% of steel grades
- Conducts heat well — 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades
- High electrical conductivity — 10.5 % IACS, better than 89% of steel grades
Limitations
- Hard to polish — 40/100, worse than 96% of steel grades
1120 properties
Typical room-temperature values for 1120-CD; bars are the position among steel grades.
Physical3
1120 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical14
1120 has a yield strength of 395 MPa (57.3 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 63% of steel grades. Elongation at break is 15.5% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1120 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 11.7 µm/m·K (6.5 µin/in·°F).
Electrical3
1120 conducts electricity at 10.5 % IACS, better than 89% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of 1120 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability6
1120's machinability is very good (76/100, better than 97% of steel grades); weldability fair (45/100); formability fair (40/100).
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. 1120 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1120
Is 1120 easy to machine?
Excellent screw-machine steel — MnS inclusions break chips; run high speeds with sulfurized cutting oil, expect ~80 % of 1212 productivity.
Can 1120 be welded?
Weldable with low-hydrogen processes but sulfur promotes hot/solidification cracking; avoid structural welds or use filler with high Mn and preheat.
Can 1120 be formed, bent or molded?
Only light cold bending and moderate upsetting; sulfide stringers cause splitting in tight-radius transverse bends — anneal or hot form for severe shapes.
1120 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 |
|---|---|---|
| C | 0.18 – 0.23 | 0.2 |
| Mn | 0.7 – 1 | 0.85 |
| P | ≤ 0.04 | 0.02 |
| Sresulfurized for machinability | 0.08 – 0.13 | 0.1 |
| Fe | balance |
What surface finishes work on 1120?
No natural corrosion resistance: use zinc or zinc-nickel plating, black oxide, phosphate-and-oil or paint; inclusions can leave pits after bright polishing or plating.
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 1120 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- G11200
How much does 1120 cost?
1120 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.
1120 — frequently asked
What is 1120 used for?
1120 is typically used for fittings, shafts and fasteners. In short: higher carbon than 1119; 76 machinability rating; general screw-machine bar.
What is the yield strength of 1120?
1120 has a typical yield strength of 395 MPa (57.3 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 63% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is 1120 easy to machine?
Yes — machinability is rated very good (76/100, better than 97% of steel grades). Excellent screw-machine steel — MnS inclusions break chips; run high speeds with sulfurized cutting oil, expect ~80 % of 1212 productivity.
Can 1120 be welded?
With care — weldability is rated fair (45/100). Weldable with low-hydrogen processes but sulfur promotes hot/solidification cracking; avoid structural welds or use filler with high Mn and preheat.
What surface finishes work on 1120?
No natural corrosion resistance: use zinc or zinc-nickel plating, black oxide, phosphate-and-oil or paint; inclusions can leave pits after bright polishing or plating.
Can 1120 be formed, bent or molded?
Only light cold bending and moderate upsetting; sulfide stringers cause splitting in tight-radius transverse bends — anneal or hot form for severe shapes.
What is the maximum service temperature of 1120?
1120 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 1120-CD and 1120-A?
CD is the default condition — standard stocked condition: good size tolerance, straightness and the best chip control on screw machines. A: softest condition for heavy cold forming, heading or deep boring before hardening. Yield strength is 395 MPa in CD versus 220 MPa in A.
How much does 1120 cost?
1120 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 A29/A29M — Steel Bars, Carbon and Alloy, Hot-Wrought — ASTM (2020)
- ASTM A108 — Steel Bar, Carbon and Alloy, Cold-Finished — ASTM (2018)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Machinery's Handbook (machinability ratings, free-machining steels) — Industrial Press (2020)
- GB/T 8731 (Y20 comparable grade) — 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.