Stainless Steel 1.6982
EN 1.6982 · UNS J91540 · ASTM A743/A487 Gr. CA6NM
1.6982 (GX3CrNi13-4, ASTM A743/A487 Gr.
Reference datasheet — 1.6982 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 QT1 condition
1.6982 tempers and conditions
1.6982 is supplied in 5 conditions, soft to hard. QT1 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 |
|---|---|---|---|---|---|---|
Solution annealed | Choose when heavy machining or sour-service hardness limits (NACE ≤23 HRC) dominate over strength. | 520 | 720 | 22 | 18 HRC | — |
QT1Default Austenitised ~1000–1050 °C, air/oil quenched, tempered 600–620 °C | Standard supply condition: best balance of strength, ductility and low-temperature toughness for hydro runners, pump and valve bodies. | 640 | 830 | 19 | 24 HRC | — |
ASTM A743/A487 Gr. CA6NM normalize/quench + temper, 285 HB max | Order this when US/ASTM pressure-casting certification (A743, A487 Class A, A352 CA6NM low-temp) is required. | 650 | 830 | 20 | 25 HRC | 2.9 % IACS |
Quenched and tempered at lower temperature for higher strength | Pick when higher yield strength is needed (highly loaded runners, blades) and some toughness/sour-service margin can be traded away. | 720 | 920 | 16 | 30 HRC | — |
As fabricated | Raw casting before heat treatment — hard, low toughness, essentially never shipped for service. | 850 | 1,100 | 7 | 42 HRC | 2.8 % IACS |
What is 1.6982?
1.6982 (GX3CrNi13-4, ASTM A743/A487 Gr. CA6NM, UNS J91540) is an ultra-low-carbon 13Cr-4Ni cast steel classified in the low-alloy steel section of EN but metallurgically equivalent to soft-martensitic CA6NM/1.4317. It is specified for large hydraulic and pump castings because of its weldability (score 70) and toughness, with 640 MPa yield, 830 MPa tensile, 19 % elongation and 250 HB (24 HRC) in the tempered condition. Conditions on file include F, A, QT1, QT2 and CA6NM-QT, with maximum service temperature 450 °C. Machinability is low (score 42) and corrosion resistance (score 55) is below the Mo-free 16Cr-4Ni grade 1.4421, which is the nearest alternative when more corrosion margin is required. 1.6982 has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,450°C (2,642 °F). 1.6982 has a yield strength of 640 MPa (92.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 90% of stainless steel grades. Elongation at break is 19% and the elastic modulus is 200 GPa (29 Msi).
What is 1.6982 used for?
- Hydraulic turbine runners
- Pump impellers
- Weld-repaired large castings
Advantages
- Low embodied carbon — 2.8 kg CO₂/kg, better than 99% of stainless steel grades
- Conducts heat well — 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades
- High strength — 640 MPa (92.8 ksi), better than 90% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
Limitations
- Limited formability — 15/100, worse than 91% of stainless steel grades
- Limited ductility — 19%, worse than 81% of stainless steel grades
1.6982 properties
Typical room-temperature values for 1.6982-QT1; bars are the position among stainless steel grades.
Physical3
1.6982 has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Mechanical16
1.6982 has a yield strength of 640 MPa (92.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 90% of stainless steel grades. Elongation at break is 19% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.6982 is rated for continuous service to 450°C (842 °F). It conducts heat at 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
1.6982 conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.6982 takes about 36 MJ of energy and emits 2.8 kg of CO₂ — less than 99% of stainless steel grades. Typical recycled content is 70%.
Manufacturability8
1.6982's machinability is fair (42/100, better than 79% of stainless steel grades); weldability very good (70/100); formability poor (15/100).
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 stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. 1.6982 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.6982
Is 1.6982 easy to machine?
Machine in the tempered condition with rigid setups, sharp positive-rake carbide and generous coolant; low carbon makes it gummy and work-hardening, so keep feed constant and avoid dwelling.
Can 1.6982 be welded?
Very weldable for a martensitic grade: use 410NiMo (E410NiMo/ER410NiMo) filler, 100–160 °C preheat/interpass, and post-weld temper at 580–620 °C below the original tempering temperature to restore HAZ toughness.
Can 1.6982 be formed, bent or molded?
Sand or investment cast with well-fed heavy sections; homogenise/austenitise 1000–1050 °C then air or oil quench, double temper — no cold forming of the finished part.
1.6982 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 |
|---|---|---|
| CEN GX3CrNi13-4 ≤0.05; CA6NM ≤0.06 | ≤ 0.06 | 0.03 |
| Si | ≤ 1 | 0.5 |
| Mn | ≤ 1 | 0.7 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| CrCA6NM allows 11.5–14.0 | 12 – 13.5 | 12.8 |
| NiCA6NM 3.5–4.5 | 3.5 – 5 | 4.2 |
| MoCA6NM 0.4–1.0 | 0.3 – 0.7 | 0.5 |
| Nkept low for toughness | ≤ 0.02 | 0.02 |
| Fe | balance |
What surface finishes work on 1.6982?
Passivate or electropolish after machining; grind/polish for cavitation surfaces, and hard-chrome, stellite or HVOF overlays are used on wear/erosion zones — no anodizing.
Surface treatments FabDigit runs on stainless 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).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel 1.6982 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- J91540
- ASTM
- A743/A487 Gr. CA6NM
- EN / DIN / Werkstoff-Nr.
- GX3CrNi13-4
How much does 1.6982 cost?
1.6982 is a premium-cost stainless steel ($$$), cheaper than about 51% 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.
1.6982 — frequently asked
What is 1.6982 used for?
1.6982 is typically used for hydraulic turbine runners, pump impellers and weld-repaired large castings. In short: most weldable martensitic casting; standard hydro turbine grade; ultra-low-carbon 13Cr-4Ni.
What is the yield strength of 1.6982?
1.6982 has a typical yield strength of 640 MPa (92.8 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 90% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.6982 easy to machine?
Not especially — machinability is rated fair (42/100, better than 79% of stainless steel grades). Machine in the tempered condition with rigid setups, sharp positive-rake carbide and generous coolant; low carbon makes it gummy and work-hardening, so keep feed constant and avoid dwelling.
Can 1.6982 be welded?
Yes — weldability is rated very good (70/100). Very weldable for a martensitic grade: use 410NiMo (E410NiMo/ER410NiMo) filler, 100–160 °C preheat/interpass, and post-weld temper at 580–620 °C below the original tempering temperature to restore HAZ toughness.
What surface finishes work on 1.6982?
Passivate or electropolish after machining; grind/polish for cavitation surfaces, and hard-chrome, stellite or HVOF overlays are used on wear/erosion zones — no anodizing.
Can 1.6982 be formed, bent or molded?
Sand or investment cast with well-fed heavy sections; homogenise/austenitise 1000–1050 °C then air or oil quench, double temper — no cold forming of the finished part.
What is the maximum service temperature of 1.6982?
1.6982 is rated for continuous use to about 450°C (842 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.6982-QT1 and 1.6982-F?
QT1 is the default condition — standard supply condition: best balance of strength, ductility and low-temperature toughness for hydro runners, pump and valve bodies. F: raw casting before heat treatment — hard, low toughness, essentially never shipped for service. Yield strength is 640 MPa in QT1 versus 850 MPa in F.
How much does 1.6982 cost?
1.6982 is a premium-cost stainless steel ($$$), cheaper than about 51% 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 10213 — Steel castings for pressure purposes (GX3CrNi13-4 / 1.6982) — CEN (2016)
- ASTM A743/A743M — Castings, Iron-Chromium-Nickel, Corrosion Resistant (CA6NM) — ASTM (2021)
- ASTM A487/A487M — Steel Castings for Pressure-Containing Parts (CA6NM Class A) — ASTM (2020)
- ASTM A352/A352M — Ferritic and Martensitic Steel Castings for Low-Temperature Service — ASTM (2018)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Steel Castings Handbook, 6th ed. — Steel Founders' Society of America / ASM (1995)
- GB/T 6967 / GB/T 2100 — ZG06Cr13Ni4Mo — SAC (2009)
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.