Steel 5147
AISI/SAE 5147 · UNS G51470
5147 (UNS G51470) is a medium-carbon chromium alloy steel in the SAE 51xx series, close to 5145 but with slightly tighter chemistry control at roughly 0.48 % C and 1 % Cr.
Reference datasheet — 5147 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 A condition
5147 tempers and conditions
5147 is supplied in 10 conditions, soft to hard. A is the default FabDigit quotes; the values on this page are for it.
Compare all 10 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Spheroidize annealed | Choose for cold heading, upsetting or deep machining where maximum softness and globular carbides are needed. | 340 | 620 | 26 | 180 HB | 8 % IACS |
ADefault Solution annealed | Softest supply condition for machining, cold forming and subsequent quench-and-temper of the finished part. | 365 | 675 | 22 | 197 HB | — |
Hot rolled | Cheapest mill condition for forging stock or parts that will be heat treated after rough machining. | 500 | 830 | 17 | 22 HRC | 7.8 % IACS |
Normalized | Uniform fine pearlitic structure for forged blanks before machining or hardening; higher strength than annealed. | 680 | 1,020 | 19 | 31 HRC | 7.8 % IACS |
Cold drawn | Pick for close size tolerance, straightness and higher as-supplied yield strength in shafting. | 700 | 830 | 12 | 24 HRC | 7.8 % IACS |
Q&T 26-32 HRC | Tough general-purpose through-hardened condition for shafts and structural links where impact matters more than strength. | 850 | 970 | 18 | 29 HRC | — |
Induction hardened | Use when a hard wear surface (55-60 HRC) with a tough 30-35 HRC core is required, e.g. journals and cam surfaces. | 1,000 | 1,150 | 12 | 57 HRC | 7.5 % IACS |
Q&T 32-38 HRC | Balanced strength/toughness for gear blanks, connecting rods and steering components. | 1,030 | 1,150 | 15 | 35 HRC | — |
Q&T 38-44 HRC | High-strength through-hardened condition for highly loaded pins, rollers and torsion parts. | 1,270 | 1,400 | 11 | 41 HRC | — |
Q&T 44-48 HRC | Maximum practical through-hardness for wear-loaded parts; low toughness, notch-sensitive, use only on modest sections. | 1,450 | 1,600 | 9 | 46 HRC | — |
What is 5147?
5147 (UNS G51470) is a medium-carbon chromium alloy steel in the SAE 51xx series, close to 5145 but with slightly tighter chemistry control at roughly 0.48 % C and 1 % Cr. It is used for through-hardened shafts, gears and fasteners and is available annealed, spheroidized, normalized, hot rolled, cold drawn, induction hardened and in quench-and-temper bands from 26–32 to 44–48 HRC. Annealed properties are 365 MPa yield, 675 MPa tensile, 22 % elongation and about 197 HB, with a machinability rating near 55. Weldability is poor and there is no corrosion resistance, so plated or phosphated finishes are standard; 5145 or 4140 are the usual substitutes when availability is limited. 5147 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). 5147 has a yield strength of 365 MPa (52.9 ksi) and a tensile strength of 675 MPa (97.9 ksi) — weaker than 71% of steel grades. Elongation at break is 22% and the elastic modulus is 205 GPa (29.7 Msi).
What is 5147 used for?
- shafts
- gears
- fasteners
5147 properties
Typical room-temperature values for 5147-A; bars are the position among steel grades.
Physical3
5147 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).
Mechanical16
5147 has a yield strength of 365 MPa (52.9 ksi) and a tensile strength of 675 MPa (97.9 ksi) — weaker than 71% of steel grades. Elongation at break is 22% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
5147 is rated for continuous service to 400°C (752 °F). It conducts heat at 42 W/m·K (24.3 BTU/hr·ft·°F), worse than 56% of steel grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
5147 conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 5147 takes about 34 MJ of energy and emits 2.3 kg of CO₂ — more than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
5147's machinability is good (55/100, better than 62% of steel grades); weldability fair (35/100); 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. 5147 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 5147
Is 5147 easy to machine?
Machine in the annealed or spheroidized condition (≈60 % of 1212); above 35 HRC use carbide or CBN with rigid setups and finish-grind critical fits.
Can 5147 be welded?
Poor weldability — 0.48 % C with 1 % Cr gives high hardenability; preheat 250–350 °C, low-hydrogen consumables and immediate stress relief/temper, or avoid welding entirely.
Can 5147 be formed, bent or molded?
Hot forge 1050–1200 °C, finish above 900 °C and normalize; cold forming only in spheroidized condition with generous bend radii.
5147 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 | 0.46 – 0.51 | 0.49 |
| Mn | 0.7 – 0.95 | 0.82 |
| Crtighter/higher Cr band than 5145 | 0.85 – 1.15 | 1 |
| Si | 0.15 – 0.35 | 0.25 |
| P | ≤ 0.04 | |
| S | ≤ 0.04 | |
| Fe | balance |
What surface finishes work on 5147?
No anodizing; use phosphate + oil, black oxide, zinc or hard chrome plating, and bake after plating to avoid hydrogen embrittlement above 1000 MPa.
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 5147 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- G51470
How much does 5147 cost?
5147 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.
5147 — frequently asked
What is 5147 used for?
5147 is typically used for shafts, gears and fasteners. In short: tighter-chemistry 5145 variant; high hardenability, 48 HRC capable; needs protective coating.
What is the yield strength of 5147?
5147 has a typical yield strength of 365 MPa (52.9 ksi) and a tensile strength of 675 MPa (97.9 ksi) — weaker than 71% of steel grades. Strength varies by condition: see the 10 listed tempers.
Is 5147 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Machine in the annealed or spheroidized condition (≈60 % of 1212); above 35 HRC use carbide or CBN with rigid setups and finish-grind critical fits.
Can 5147 be welded?
With care — weldability is rated fair (35/100). Poor weldability — 0.48 % C with 1 % Cr gives high hardenability; preheat 250–350 °C, low-hydrogen consumables and immediate stress relief/temper, or avoid welding entirely.
What surface finishes work on 5147?
No anodizing; use phosphate + oil, black oxide, zinc or hard chrome plating, and bake after plating to avoid hydrogen embrittlement above 1000 MPa.
Can 5147 be formed, bent or molded?
Hot forge 1050–1200 °C, finish above 900 °C and normalize; cold forming only in spheroidized condition with generous bend radii.
What is the maximum service temperature of 5147?
5147 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 5147-A and 5147-IH?
A is the default condition — softest supply condition for machining, cold forming and subsequent quench-and-temper of the finished part. IH: use when a hard wear surface (55-60 HRC) with a tough 30-35 HRC core is required, e.g. journals and cam surfaces. Yield strength is 365 MPa in A versus 1,000 MPa in IH.
How much does 5147 cost?
5147 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 J404 — Chemical Compositions of SAE Alloy Steels — SAE International (2021)
- SAE J1268 — Hardenability Bands for Carbon and Alloy H Steels — SAE International (2019)
- ASTM A29/A29M — Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements — 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)
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.