Steel 1330 · supply condition
Steel 1330 Cold Finished
Properties of the Cold Finished condition, compared with the other 1330 tempers.
Cold-drawn/turned-ground-polished 1330 Mn-alloy bar: ~10–20 % strength gain over hot rolled with tight size tolerance and good machined finish, but reduced ductility and residual stress.
What is 1330 Cold Finished?
1330 Cold Finished is 1330 supplied in the Cold Finished condition — cold-drawn/turned-ground-polished 1330 Mn-alloy bar: ~10–20 % strength gain over hot rolled with tight size tolerance and good machined finish, but reduced ductility and residual stress. 1330 Cold Finished has a yield strength of 585 MPa (84.8 ksi) and a tensile strength of 705 MPa (102 ksi) — stronger than 76% of steel grades. Elongation at break is 13% and the elastic modulus is 205 GPa (29.7 Msi). 1330 Cold Finished has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F). HR is the default condition FabDigit quotes; Cold Finished is available on request or by drawing note.
Advantages
- High strength — 585 MPa (84.8 ksi), better than 76% of steel grades
Limitations
- Limited ductility — 13%, worse than 78% of steel grades
- Limited service temperature — 300°C (572 °F), worse than 77% of steel grades
1330 Cold Finished properties
Typical room-temperature values for 1330 Cold Finished — 35 properties are specific to this condition; the rest are grade-level values shared by every 1330 temper. Each bar shows where the value sits among the steel grades in FabDigit's library — further right is higher.
Physical3
1330 Cold Finished has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,425°C (2,597 °F).
Mechanical13
1330 Cold Finished has a yield strength of 585 MPa (84.8 ksi) and a tensile strength of 705 MPa (102 ksi) — stronger than 76% of steel grades. Elongation at break is 13% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
1330 Cold Finished is rated for continuous service to 300°C (572 °F). It conducts heat at 44 W/m·K (25.4 BTU/hr·ft·°F), better than 57% of steel grades. Thermal expansion is 12.2 µm/m·K (6.78 µin/in·°F).
Electrical3
1330 Cold Finished conducts electricity at 7.8 % IACS, worse than 58% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of 1330 Cold Finished takes about 27 MJ of energy and emits 2 kg of CO₂ — less than 59% of steel grades. Typical recycled content is 30%.
Manufacturability7
1330 Cold Finished's machinability is fair (52/100, better than 52% of steel grades); weldability fair (45/100); formability poor (32/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other 1330 tempers and conditions
1330 is also supplied in 8 other conditions. The full side-by-side table is on the 1330 overview.
- HRDefaultCheapest stock condition for parts that will be machined and then heat treated by the fabricator.415 MPa yield · 197 HB
- Q&T 40-45 HRCMaximum practical strength level for 1330; wear-and-strength parts where notch toughness is secondary.1,315 MPa yield · 43 HRC
- Q&T 33-38 HRCPick the ~425 °C temper at 33–38 HRC for heavily loaded bolts, pins and gear blanks requiring about 1145 MPa tensile strength; ductility and machinability fall against the higher temper.1,085 MPa yield · 36 HRC
- Q&TChoose quenched and tempered near 540 °C (≈26–30 HRC) as the general-purpose condition for shafts and bolts needing about 900 MPa tensile strength with good toughness and 18% elongation.830 MPa yield · 27 HRC
- CRPick for close tolerance, bright finish and higher as-supplied strength on shafting and fastener stock.690 MPa yield · 235 HB
- Cold FinishedCold-drawn/turned-ground-polished 1330 Mn-alloy bar: ~10–20 % strength gain over hot rolled with tight size tolerance and good machined finish, but reduced ductility and residual stress.585 MPa yield · 202 HB
- NormalizedUniform fine grain and good toughness without quenching distortion; typical pre-machining condition for forgings.560 MPa yield · 23 HRC
- AnnealedSoftest, most machinable and most formable condition; use before cold forming or deep machining.470 MPa yield · 207 HB
Working with 1330 Cold Finished
Is 1330 easy to machine?
Machines like a medium-carbon steel at ~60% of 1212; best in annealed/normalized state with rigid setups, carbide tooling and copious coolant — the high Mn makes chips gummy and work-hardening prone above 300 HB.
Can 1330 be welded?
Weldable with low-hydrogen electrodes but C≈0.30 plus 1.75 Mn gives high hardenability: preheat 200–300 °C, control interpass, and stress-relieve or re-temper after welding; avoid welding in the fully hardened condition.
Can 1330 be formed, bent or molded?
Hot forge 1100–1200 °C and finish above 900 °C, then normalize; cold bending only in annealed condition with generous bend radii (≥2.5 t).
What surface finishes work on 1330?
No natural corrosion protection — specify zinc or zinc-nickel plate (bake for hydrogen relief above 320 HB), manganese phosphate + oil, black oxide, or primer/paint; polishes to a good bright finish before plating.
1330 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 |
|---|---|---|
| CSAE J404 heat analysis | 0.28 – 0.33 | 0.3 |
| Mnprimary alloying element of 13xx series | 1.6 – 1.9 | 1.75 |
| Si | 0.15 – 0.35 | 0.25 |
| P | ≤ 0.04 | — |
| S | ≤ 0.04 | — |
| Fe | balance | — |
1330 Cold Finished — frequently asked
What is 1330 Cold Finished used for?
1330 Cold Finished is typically used for drive shafts, industrial gears and bolts. In short: workhorse Mn-Mo bar.
What is the yield strength of 1330 Cold Finished?
1330 Cold Finished has a typical yield strength of 585 MPa (84.8 ksi) and a tensile strength of 705 MPa (102 ksi) — stronger than 76% of steel grades. Strength varies by condition: see the 9 listed tempers.
Is 1330 Cold Finished easy to machine?
Reasonably — machinability is rated fair (52/100, better than 52% of steel grades). Machines like a medium-carbon steel at ~60% of 1212; best in annealed/normalized state with rigid setups, carbide tooling and copious coolant — the high Mn makes chips gummy and work-hardening prone above 300 HB.
Can 1330 Cold Finished be welded?
With care — weldability is rated fair (45/100). Weldable with low-hydrogen electrodes but C≈0.30 plus 1.75 Mn gives high hardenability: preheat 200–300 °C, control interpass, and stress-relieve or re-temper after welding; avoid welding in the fully hardened condition.
What surface finishes work on 1330 Cold Finished?
No natural corrosion protection — specify zinc or zinc-nickel plate (bake for hydrogen relief above 320 HB), manganese phosphate + oil, black oxide, or primer/paint; polishes to a good bright finish before plating.
Can 1330 Cold Finished be formed, bent or molded?
Hot forge 1100–1200 °C and finish above 900 °C, then normalize; cold bending only in annealed condition with generous bend radii (≥2.5 t).
What is the maximum service temperature of 1330 Cold Finished?
1330 Cold Finished is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1330-HR and 1330-CR?
HR is the default condition — cheapest stock condition for parts that will be machined and then heat treated by the fabricator. CR: pick for close tolerance, bright finish and higher as-supplied strength on shafting and fastener stock. Yield strength is 415 MPa in HR versus 690 MPa in CR.
Can FabDigit make parts in 1330 Cold Finished?
Yes — 1330 Cold Finished is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- SAE J404 — Chemical Compositions of SAE Alloy Steels — SAE International (2021)
- ASTM A29/A29M — General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought — ASTM (2020)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.4 — Heat Treating — ASM International (1991)
- Machinery's Handbook, 31st ed. — Industrial Press (2020)
- GB/T 3077 (30Mn2 near-equivalent) — SAC / (2015)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.