Steel 17CrS3
EN 17CrS3
17CrS3 (1.7014) is a resulfurized free-machining version of the 17Cr3 case-hardening chromium steel from the EN carburizing family.
Reference datasheet — 17CrS3 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 +AC+C condition
17CrS3 tempers and conditions
17CrS3 is supplied in 5 conditions, soft to hard. +AC+C is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Spheroidize annealed | Softest condition — pick it for cold extrusion, cold heading and heavy deep-hole machining before carburizing. | 310 | 500 | 23 | 155 HB | — |
Treated to ferrite-pearlite structure | Hot-rolled/normalized-type bar with a defined ferrite-pearlite structure and hardness band — the usual starting stock for hot forging and for parts machined from hot-rolled bar. | 350 | 560 | 19 | 165 HB | — |
Hot rolled with specified (standard) hardenability band, Jominy… | Order this when the carburizing shop needs a guaranteed Jominy end-quench band so case/core hardness after quenching is reproducible. | 370 | 600 | 17 | 175 HB | — |
+AC+CDefault Spheroidize annealed then cold drawn | Standard bright bar for CNC/cam automatic lathes: good size tolerance, straightness and chip control before carburizing. | 490 | 620 | 10 | 190 HB | — |
Carburized, quenched and low-temperature tempered (finished part condition) | Final in-service condition: hard wear-resistant case with a tough, moderately strong core — for small pins, bushes and gears. | 560 | 850 | 11 | 60 HRC | — |
What is 17CrS3?
17CrS3 (1.7014) is a resulfurized free-machining version of the 17Cr3 case-hardening chromium steel from the EN carburizing family. The manganese sulfide additions raise the machinability score to 62, so it is chosen for high-volume turned parts — small gears, pins and case-hardened fasteners — that need heavy metal removal before carburizing. Default-condition properties are about 490 MPa yield, 620 MPa tensile, 10 % elongation and 190 HB (92 HRB), with service to 250 °C. Sulfur reduces transverse ductility, formability (score 35) and weldability (score 30); use 17Cr3 where welding or cold heading matter. 17CrS3 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). 17CrS3 has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 61% of steel grades. Elongation at break is 10% and the elastic modulus is 210 GPa (30.5 Msi).
What is 17CrS3 used for?
- small gears
- pins
- case-hardened fasteners
Advantages
- Low embodied carbon — 1.9 kg CO₂/kg, better than 92% of steel grades
- Easy to machine — 62/100, better than 89% of steel grades
Limitations
- Limited ductility — 10%, worse than 91% of steel grades
- Limited service temperature — 250°C (482 °F), worse than 85% of steel grades
- Hard to polish — 45/100, worse than 84% of steel grades
17CrS3 properties
Typical room-temperature values for 17CrS3-+AC+C; bars are the position among steel grades.
Physical3
17CrS3 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
17CrS3 has a yield strength of 490 MPa (71.1 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 61% of steel grades. Elongation at break is 10% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
17CrS3 is rated for continuous service to 250°C (482 °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 µm/m·K (6.67 µin/in·°F).
Electrical3
17CrS3 conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (11/100), worse than 73% of steel grades.
Sustainability4
Producing a kilogram of 17CrS3 takes about 25 MJ of energy and emits 1.9 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 30%.
Manufacturability7
17CrS3's machinability is good (62/100, better than 89% of steel grades); weldability poor (30/100); formability fair (35/100).
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. 17CrS3 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 17CrS3
Is 17CrS3 easy to machine?
Excellent for automatics — MnS breaks chips and lubricates the cutting edge; run ~20–30 % faster than 17Cr3, carbide inserts with light positive geometry, keep coolant flow to flush fine chips.
Can 17CrS3 be welded?
Avoid structural welding: sulfur promotes hot cracking; if unavoidable, preheat 150–250 °C, use low-hydrogen consumables and post-weld stress relieve, and never weld carburized surfaces.
Can 17CrS3 be formed, bent or molded?
Cold heading and cold extrusion only in the +AC condition and with reduced severity — sulfide stringers cut transverse ductility; hot forge 1100–850 °C then normalize/anneal before machining.
17CrS3 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 | 0.14 – 0.2 | 0.17 |
| Si | ≤ 0.4 | 0.25 |
| Mn | 0.6 – 0.9 | 0.75 |
| P | ≤ 0.03 | |
| Sdeliberate resulfurizing for free machining | 0.02 – 0.04 | 0.03 |
| Cr | 0.7 – 1 | 0.85 |
| Fe | balance |
What surface finishes work on 17CrS3?
Not anodizable; protect with zinc or zinc-nickel plating, phosphating, black oxide or oil. Case-hardened surfaces polish and hard-grind well, but MnS pits limit mirror finishes.
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 17CrS3 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- 1.7014
How much does 17CrS3 cost?
17CrS3 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
17CrS3 — frequently asked
What is 17CrS3 used for?
17CrS3 is typically used for small gears, pins and case-hardened fasteners. In short: best-machining case-hardening steel; free-cutting 17Cr3 variant; not for structural welds.
What is the yield strength of 17CrS3?
17CrS3 has a typical yield strength of 490 MPa (71.1 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 61% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is 17CrS3 easy to machine?
Reasonably — machinability is rated good (62/100, better than 89% of steel grades). Excellent for automatics — MnS breaks chips and lubricates the cutting edge; run ~20–30 % faster than 17Cr3, carbide inserts with light positive geometry, keep coolant flow to flush fine chips.
Can 17CrS3 be welded?
Not readily — weldability is rated poor (30/100). Avoid structural welding: sulfur promotes hot cracking; if unavoidable, preheat 150–250 °C, use low-hydrogen consumables and post-weld stress relieve, and never weld carburized surfaces.
What surface finishes work on 17CrS3?
Not anodizable; protect with zinc or zinc-nickel plating, phosphating, black oxide or oil. Case-hardened surfaces polish and hard-grind well, but MnS pits limit mirror finishes.
Can 17CrS3 be formed, bent or molded?
Cold heading and cold extrusion only in the +AC condition and with reduced severity — sulfide stringers cut transverse ductility; hot forge 1100–850 °C then normalize/anneal before machining.
What is the maximum service temperature of 17CrS3?
17CrS3 is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 17CrS3 cost?
17CrS3 is a budget-cost steel ($), 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
- EN 10084 — Case hardening steels: technical delivery conditions — CEN (2008)
- EN 10277 — Bright steel products: technical delivery conditions — CEN (2018)
- EN 10027-2 — Designation systems for steels: numerical system (1.7014) — CEN (2015)
- ASM Handbook Vol. 1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
- Stahlschlüssel (Key to Steel) — Verlag Stahlschlüssel Wegst (2019)
- European bright-bar producer datasheets for 17Cr3 / 17CrS3 case-hardening steel — various mills (2022)
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.