Stainless Steel 1.4313
EN 1.4313 · UNS S41500 · GB 0Cr13Ni4Mo
1.4313 (X3CrNiMo13-4, UNS S41500) is a low-carbon 13Cr-4Ni-Mo soft martensitic stainless supplied quenched and tempered, the wrought counterpart of cast CA6NM.
Reference datasheet — 1.4313 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 +QT780 condition
1.4313 tempers and conditions
1.4313 is supplied in 5 conditions, soft to hard. +QT780 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 |
|---|---|---|---|---|---|---|
Annealed | Pick for machining of blanks, cold straightening or forming before final quench-and-temper; hardness capped for shop workability. | 550 | 750 | 18 | 24 HRC | — |
Quenched and tempered, Rm 650–850 MPa | Highest-toughness / lowest-hardness Q&T condition — choose for sour service (≤23 HRC per NACE MR0175) and heavy welded fabrications. | 580 | 740 | 20 | 21 HRC | — |
Quenched and tempered, Rm 700–900 MPa | Intermediate forging/casing condition (EN 10250-4 style) when a little more strength than QT650 is needed with near-identical toughness. | 620 | 790 | 19 | 23 HRC | — |
+QT780Default Quenched and tempered, Rm 780–980 MPa | Workhorse stock condition for hydro-turbine runners, pump shafts and valve parts — best balance of strength, toughness and weld repairability. | 700 | 870 | 18 | 26 HRC | — |
Quenched and tempered, Rm 900–1100 MPa | Highest-strength single-temper condition for highly loaded shafts and bolting where toughness and sour-service hardness limits are not the controlling factor. | 850 | 990 | 15 | 32 HRC | — |
What is 1.4313?
1.4313 (X3CrNiMo13-4, UNS S41500) is a low-carbon 13Cr-4Ni-Mo soft martensitic stainless supplied quenched and tempered, the wrought counterpart of cast CA6NM. In the default Q&T condition it provides 700 MPa yield, 870 MPa tensile, 18 % elongation and 265 HB (26 HRC), which suits large forgings, bar and plate for hydraulic machinery that must be welded and repair-welded. Corrosion resistance is moderate and service is limited to about 400 °C; cold formability is poor, so parts are machined rather than formed. Choose 1.4418 when better general corrosion resistance is required. 1.4313 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,440°C (2,624 °F). 1.4313 has a yield strength of 700 MPa (102 ksi) and a tensile strength of 870 MPa (126 ksi) — stronger than 92% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4313 used for?
- Hydro-turbine runners
- Pump impellers/shafts
- Valve bodies
- Offshore equipment
Advantages
- Conducts heat well — 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades
- High strength — 700 MPa (102 ksi), better than 92% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
Limitations
- Limited ductility — 18%, worse than 83% of stainless steel grades
- Needs corrosion protection — 47/100, worse than 81% of stainless steel grades
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
1.4313 properties
Typical room-temperature values for 1.4313-+QT780; bars are the position among stainless steel grades.
Physical3
1.4313 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,440°C (2,624 °F).
Mechanical16
1.4313 has a yield strength of 700 MPa (102 ksi) and a tensile strength of 870 MPa (126 ksi) — stronger than 92% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4313 is rated for continuous service to 400°C (752 °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
1.4313 conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (47/100), worse than 81% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4313 takes about 53 MJ of energy and emits 4.8 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 60%.
Manufacturability8
1.4313's machinability is fair (35/100, better than 51% of stainless steel grades); weldability very good (70/100); 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 stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. 1.4313 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4313
Is 1.4313 easy to machine?
Machines like a tough 30-HRC alloy steel: rigid setups, sharp positive-rake coated carbide, ~60–110 m/min turning, heavy feeds and flood coolant to avoid work-hardened glazing and built-up edge.
Can 1.4313 be welded?
Very good for a martensitic grade — GTAW/GMAW/SMAW with 410NiMo (E410NiMo) filler, preheat/interpass ~100–160 °C for heavy sections and PWHT temper at 580–620 °C (double temper for optimum toughness); keep hydrogen low.
Can 1.4313 be formed, bent or molded?
Hot work at 1150–900 °C followed by slow cool and soft anneal; cold forming is limited to gentle bends in the +A condition — final shape is normally machined after quench and temper.
1.4313 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 |
|---|---|---|
| Clow carbon gives soft martensite and weldability | ≤ 0.05 | 0.03 |
| Si | ≤ 0.7 | 0.4 |
| Mn | ≤ 1.5 | 0.8 |
| P | ≤ 0.04 | |
| S0.030 max for some product forms | ≤ 0.02 | |
| Cr | 12 – 14 | 13 |
| Ni | 3.5 – 4.5 | 4 |
| Mo | 0.3 – 0.7 | 0.5 |
| N | ≤ 0.02 | |
| Fe | balance |
What surface finishes work on 1.4313?
Passivate (ASTM A967 nitric or citric) after machining; takes a good mechanical or electropolished finish, and is commonly hard-chrome plated or HVOF-coated on wear surfaces — avoid cathodic overprotection/plating hydrogen without bake-out.
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 1.4313 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S41500
- EN / DIN / Werkstoff-Nr.
- X3CrNiMo13-4
- GB (China)
- 0Cr13Ni4Mo
How much does 1.4313 cost?
1.4313 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.
1.4313 — frequently asked
What is 1.4313 used for?
1.4313 is typically used for hydro-turbine runners, pump impellers/shafts, valve bodies and offshore equipment. In short: best-welding martensitic stainless; wrought equivalent of CA6NM; high toughness at 26 HRC.
What is the yield strength of 1.4313?
1.4313 has a typical yield strength of 700 MPa (102 ksi) and a tensile strength of 870 MPa (126 ksi) — stronger than 92% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4313 easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of stainless steel grades). Machines like a tough 30-HRC alloy steel: rigid setups, sharp positive-rake coated carbide, ~60–110 m/min turning, heavy feeds and flood coolant to avoid work-hardened glazing and built-up edge.
Can 1.4313 be welded?
Yes — weldability is rated very good (70/100). Very good for a martensitic grade — GTAW/GMAW/SMAW with 410NiMo (E410NiMo) filler, preheat/interpass ~100–160 °C for heavy sections and PWHT temper at 580–620 °C (double temper for optimum toughness); keep hydrogen low.
What surface finishes work on 1.4313?
Passivate (ASTM A967 nitric or citric) after machining; takes a good mechanical or electropolished finish, and is commonly hard-chrome plated or HVOF-coated on wear surfaces — avoid cathodic overprotection/plating hydrogen without bake-out.
Can 1.4313 be formed, bent or molded?
Hot work at 1150–900 °C followed by slow cool and soft anneal; cold forming is limited to gentle bends in the +A condition — final shape is normally machined after quench and temper.
What is the maximum service temperature of 1.4313?
1.4313 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.
How much does 1.4313 cost?
1.4313 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 10088-3 Stainless steels — semi-finished products, bars, rods, sections — CEN (2014)
- EN 10088-1 Stainless steels — List of stainless steels (physical properties) — CEN (2014)
- ASTM A240 / A182 (UNS S41500) — ASTM International (2023)
- EN 10250-4 Open die steel forgings — stainless steels — CEN (2000)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- Soft martensitic 13Cr-4Ni stainless bar/forging datasheets (Sandvik, Böhler, Outokumpu) — various producers (2023)
- NACE MR0175 / ISO 15156-3 (13Cr-4Ni hardness limits) — NACE/ISO (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.