Steel 1547
AISI/SAE 1547 · UNS G15470
1547 (UNS G15470, formerly 1047) is a higher-carbon, high-manganese free-machining bar steel that adds hardness and wear resistance over 1541 while keeping workable turning behaviour.
Reference datasheet — 1547 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
1547 tempers and conditions
1547 is supplied in 8 conditions, soft to hard. CD is the default FabDigit quotes; the values on this page are for it.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Softest condition — choose for deep machining, cold heading blanks or before severe forming. | 345 | 620 | 20 | 179 HB | — |
Hot rolled | Lowest-cost bar for parts that will be fully machined or later heat treated. | 386 | 703 | 9 | 207 HB | — |
Normalized | Refines the hot-rolled structure for uniform hardness and better response to later quenching. | 435 | 760 | 12 | 223 HB | — |
Annealed and Cold Drawn | Anneal before drawing gives lower residual stress and better ductility/straightness than as-rolled cold drawn. | 620 | 745 | 11 | 217 HB | — |
Induction hardened | Selective surface hardening of journals/teeth on a tough core — the main reason the 15xx high-Mn carbon grades are chosen. | 620 | 900 | 10 | 57 HRC | — |
CDDefault Cold drawn | Standard stocked bar: highest as-supplied strength, tight tolerance and bright finish for turned shafts and pins. | 724 | 827 | 8 | 241 HB | — |
Q&T | Balanced strength/toughness condition for shafts, rods and highly loaded machined parts. | 760 | 950 | 15 | 30 HRC | — |
Q&T | Higher-strength temper for wear-loaded pins, links and rack teeth where toughness demand is moderate. | 1,070 | 1,240 | 11 | 40 HRC | — |
What is 1547?
1547 (UNS G15470, formerly 1047) is a higher-carbon, high-manganese free-machining bar steel that adds hardness and wear resistance over 1541 while keeping workable turning behaviour. It is used for machine and spline shafts and other wear-resistant machined components, and is stocked hot-rolled, normalized, annealed, cold-drawn, annealed-and-cold-drawn, induction-hardened and quenched and tempered to 30 or 40 HRC. Typical values are 724 MPa yield, 827 MPa tensile, 8 % elongation, 241 HB and service to 400 °C, with machinability about 55 % of 1212. Weldability and cold formability are both poor; 1541 is the easier grade to form and weld. 1547 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). 1547 has a yield strength of 724 MPa (105 ksi) and a tensile strength of 827 MPa (120 ksi) — stronger than 82% of steel grades. Elongation at break is 8% and the elastic modulus is 200 GPa (29 Msi).
What is 1547 used for?
- machine shafts
- spline shafts
- wear-resistant machined components
Advantages
- Conducts heat well — 49 W/m·K (28.3 BTU/hr·ft·°F), better than 83% of steel grades
- High strength — 724 MPa (105 ksi), better than 82% of steel grades
- High electrical conductivity — 9.5 % IACS, better than 75% of steel grades
Limitations
- Limited ductility — 8%, worse than 95% of steel grades
- Low fracture toughness — 55 MPa·√m (50.1 ksi·√in), worse than 82% of steel grades
- Limited formability — 20/100, worse than 80% of steel grades
- Difficult to weld — 25/100, worse than 77% of steel grades
1547 properties
Typical room-temperature values for 1547-CD; bars are the position among steel grades.
Physical3
1547 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).
Mechanical17
1547 has a yield strength of 724 MPa (105 ksi) and a tensile strength of 827 MPa (120 ksi) — stronger than 82% of steel grades. Elongation at break is 8% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1547 is rated for continuous service to 400°C (752 °F). It conducts heat at 49 W/m·K (28.3 BTU/hr·ft·°F), better than 83% of steel grades. Thermal expansion is 11.7 µm/m·K (6.5 µin/in·°F).
Electrical3
1547 conducts electricity at 9.5 % IACS, better than 75% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of 1547 takes about 25 MJ of energy and emits 2 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability8
1547's machinability is good (55/100, better than 62% of steel grades); weldability poor (25/100); formability poor (20/100).
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. 1547 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1547
Is 1547 easy to machine?
Machines like a medium-carbon steel at ~55 % of 1212 — use rigid setups, carbide at 90–140 m/min, and expect better chip control in the cold-drawn or spheroidize-annealed condition.
Can 1547 be welded?
Poor weldability (CE ≈ 0.75): preheat 200–260 °C, low-hydrogen consumables and post-weld stress relief/temper are needed to avoid HAZ martensite cracking.
Can 1547 be formed, bent or molded?
Cold formability is limited by carbon and Mn — bend generously (≥3t) after anneal, or hot form at 900–1200 °C; ideal for hot upsetting and roll forming of blanks.
1547 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 G15470 | 0.43 – 0.51 | 0.47 |
| Mnhigh-Mn 15xx series | 1.35 – 1.65 | 1.5 |
| Sitypical for killed bar; not specified for some product forms | 0.15 – 0.35 | 0.25 |
| P | ≤ 0.03 | 0.02 |
| Smax; resulfurized 11xx/12xx-type variants order S to a range | ≤ 0.05 | 0.03 |
| Fe | balance |
What surface finishes work on 1547?
No corrosion resistance: use oiling, manganese/zinc phosphate, black oxide, zinc or hard-chrome plating; polishes well after quench-and-temper for a fine, uniform structure.
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 1547 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- G15470
How much does 1547 cost?
1547 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.
1547 — frequently asked
What is 1547 used for?
1547 is typically used for machine shafts, spline shafts and wear-resistant machined components. In short: wear-resistant free-machining grade; harder than 1541; poor weldability, CE about 0.75.
What is the yield strength of 1547?
1547 has a typical yield strength of 724 MPa (105 ksi) and a tensile strength of 827 MPa (120 ksi) — stronger than 82% of steel grades. Strength varies by condition: see the 8 listed tempers.
Is 1547 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Machines like a medium-carbon steel at ~55 % of 1212 — use rigid setups, carbide at 90–140 m/min, and expect better chip control in the cold-drawn or spheroidize-annealed condition.
Can 1547 be welded?
Not readily — weldability is rated poor (25/100). Poor weldability (CE ≈ 0.75): preheat 200–260 °C, low-hydrogen consumables and post-weld stress relief/temper are needed to avoid HAZ martensite cracking.
What surface finishes work on 1547?
No corrosion resistance: use oiling, manganese/zinc phosphate, black oxide, zinc or hard-chrome plating; polishes well after quench-and-temper for a fine, uniform structure.
Can 1547 be formed, bent or molded?
Cold formability is limited by carbon and Mn — bend generously (≥3t) after anneal, or hot form at 900–1200 °C; ideal for hot upsetting and roll forming of blanks.
What is the maximum service temperature of 1547?
1547 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 1547-CD and 1547-A?
CD is the default condition — standard stocked bar: highest as-supplied strength, tight tolerance and bright finish for turned shafts and pins. A: softest condition — choose for deep machining, cold heading blanks or before severe forming. Yield strength is 724 MPa in CD versus 345 MPa in A.
How much does 1547 cost?
1547 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, General Requirements — 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, heat treatment of carbon steels) — Industrial Press (2020)
- SAE/ASM carbon steel bar mechanical property tables — ASM International (2001)
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.