Steel 1527 QT-HB230
Heat-treated state
AISI/SAE 1527 · UNS G15270
QT-HB230 = q&T ~200–240 HB
Use in small sections (typically <25 mm) where higher yield and wear resistance are needed; low carbon caps attainable hardness near 25 HRC.
Values for the QT-HB230 condition
Other 1527 tempers and conditions
1527 is listed in 6 conditions; see the grade overview at 1527.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Use before severe cold forming, deep drawing or heavy machining where maximum ductility and low residual stress matter. | 265 | 470 | 28 | 135 HB | — |
HRDefault Hot rolled | Cheapest, most-stocked condition for welded structures and parts that will be machined all over or later heat treated. | 305 | 550 | 20 | 160 HB | — |
Normalized | Chosen after forging or welding to refine grain and give uniform strength/toughness through the section. | 345 | 570 | 23 | 170 HB | — |
Cold Drawn + Stress Relieved | Specify when cold-drawn strength is wanted but machining-induced distortion or straightness drift must be minimised. | 480 | 590 | 16 | 175 HB | 10 % IACS |
Cold drawn | Pick for close size tolerance, smooth surface and ~70% higher yield strength without heat treatment; residual stress can cause distortion after unbalanced machining. | 530 | 620 | 13 | 183 HB | — |
QT-HB230This page Q&T ~200–240 HB | Use in small sections (typically <25 mm) where higher yield and wear resistance are needed; low carbon caps attainable hardness near 25 HRC. | 600 | 760 | 18 | 20 HRC | — |
What is 1527 QT-HB230?
1527 QT-HB230 is 1527 heat treated to QT-HB230 — use in small sections (typically <25 mm) where higher yield and wear resistance are needed; low carbon caps attainable hardness near 25 HRC. 1527 QT-HB230 has a yield strength of 600 MPa (87 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 77% of steel grades. Elongation at break is 18% and the elastic modulus is 200 GPa (29 Msi). 1527 QT-HB230 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; QT-HB230 is available on request or by drawing note.
Advantages
- Conducts heat well — 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades
- High electrical conductivity — 10 % IACS, better than 83% of steel grades
- High strength — 600 MPa (87 ksi), better than 77% of steel grades
1527 QT-HB230 properties
Typical room-temperature values for 1527 QT-HB230; 11 are specific to this condition. Other listed values are 1527 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
1527 QT-HB230 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).
Mechanical15
1527 QT-HB230 has a yield strength of 600 MPa (87 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 77% of steel grades. Elongation at break is 18% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1527 QT-HB230 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
1527 QT-HB230 conducts electricity at 10 % IACS, better than 83% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of 1527 QT-HB230 takes about 26 MJ of energy and emits 2 kg of CO₂ — less than 64% of steel grades. Typical recycled content is 30%.
Manufacturability8
1527 QT-HB230's machinability is fair (44/100, worse than 71% of steel grades); weldability very good (70/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1527 QT-HB230
Is 1527 easy to machine?
Machines like a medium-carbon Mn steel — gummy in the annealed state, best in cold drawn or normalized condition with sharp carbide tooling, positive rake and generous coolant; no lead/high-S free-cutting benefit.
Can 1527 be welded?
Readily arc welded (SMAW/GMAW/FCAW) with E70xx/ER70S-x filler; carbon equivalent ~0.5 so preheat 100–150 °C for sections over ~25 mm and consider post-weld stress relief.
Can 1527 be formed, bent or molded?
Good cold bending and upsetting in the annealed/hot-rolled state; cold-drawn stock has limited remaining ductility, so use generous bend radii or re-anneal before severe forming.
What surface finishes work on 1527?
No natural corrosion resistance — protect with zinc or zinc-nickel plating, phosphate + oil, black oxide, e-coat or paint; polishes to a modest luster only.
1527 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 J403 heat analysis | 0.22 – 0.29 | 0.26 |
| Mnhigh-Mn 15xx series | 1.2 – 1.5 | 1.35 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.05 | 0.03 |
| Sitypical for killed bar/plate; not specified for all product forms | 0.15 – 0.35 | 0.25 |
| Fe | balance | — |
1527 QT-HB230 — frequently asked
What is 1527 QT-HB230 used for?
1527 QT-HB230 is typically used for welded structural parts, cold-formed brackets, shafts and fasteners. In short: weldable higher-strength carbon steel; good cold forming, slow machining; stronger substitute for 1020.
What is the yield strength of 1527 QT-HB230?
1527 QT-HB230 has a typical yield strength of 600 MPa (87 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 77% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is 1527 QT-HB230 easy to machine?
Not especially — machinability is rated fair (44/100, worse than 71% of steel grades). Machines like a medium-carbon Mn steel — gummy in the annealed state, best in cold drawn or normalized condition with sharp carbide tooling, positive rake and generous coolant; no lead/high-S free-cutting benefit.
Can 1527 QT-HB230 be welded?
Yes — weldability is rated very good (70/100). Readily arc welded (SMAW/GMAW/FCAW) with E70xx/ER70S-x filler; carbon equivalent ~0.5 so preheat 100–150 °C for sections over ~25 mm and consider post-weld stress relief.
What surface finishes work on 1527 QT-HB230?
No natural corrosion resistance — protect with zinc or zinc-nickel plating, phosphate + oil, black oxide, e-coat or paint; polishes to a modest luster only.
Can 1527 QT-HB230 be formed, bent or molded?
Good cold bending and upsetting in the annealed/hot-rolled state; cold-drawn stock has limited remaining ductility, so use generous bend radii or re-anneal before severe forming.
What is the maximum service temperature of 1527 QT-HB230?
1527 QT-HB230 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 1527-HR and 1527-CD?
HR is the default condition — cheapest, most-stocked condition for welded structures and parts that will be machined all over or later heat treated. CD: pick for close size tolerance, smooth surface and ~70% higher yield strength without heat treatment; residual stress can cause distortion after unbalanced machining. Yield strength is 305 MPa in HR versus 530 MPa in CD.
Sources
- SAE J403 — Chemical Compositions of SAE Carbon Steels — SAE International (2014)
- ASTM A29/A29M — General Requirements for 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)
- Metals Handbook Desk Edition — Carbon Steel Machinability Ratings — ASM International (1998)
- MatWeb typical property records for SAE 1526/1527 carbon steel — MatWeb LLC (2024)
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.