Stainless Steel 1.4028 +CR (Cold rolled hard strip)
Supply condition
EN 1.4028 · GB 3Cr13
Use cold rolled hard strip for blanking blades and shims that are hardened after stamping; 900 MPa tensile comes with 8% elongation and limited bending capability.
Values for the +CR condition
Other 1.4028 tempers and conditions
1.4028 is listed in 7 conditions; see the grade overview at 1.4028.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+ADefault Annealed | Pick the soft annealed delivery condition (≤235 HB) for machining and cold forming ahead of customer hardening; strength is capped near 740 MPa tensile with 17% elongation. | 450 | 740 | 17 | 15 HRC | — |
Cold drawn | Choose annealed-then-cold-drawn bar for turned parts needing tight diameter tolerance and straightness; drawing lifts yield to 620 MPa but cuts formability and elongation to 12%. | 620 | 820 | 12 | 24 HRC | 3.1 % IACS |
Quenched and tempered, Rm 800–950 MPa | Choose this quenched and tempered EN grade (Rm 800–950 MPa) for shafts, valve stems and fasteners needing balanced toughness and medium strength; welding remains difficult at 265 HB. | 650 | 870 | 14 | 26 HRC | — |
+CRThis page Cold rolled hard strip | Use cold rolled hard strip for blanking blades and shims that are hardened after stamping; 900 MPa tensile comes with 8% elongation and limited bending capability. | 700 | 900 | 8 | 28 HRC | 3.1 % IACS |
Quenched and tempered, Rm 850–1000 MPa | Pick the next quench-and-temper step up (Rm 850–1000 MPa) for loaded shafts and pump or valve parts, accepting 12% elongation and machinability down to 36. | 700 | 920 | 12 | 30 HRC | — |
Hardened and tempered ~400 °C | Choose hardening with a tempering near 400 °C (~46–48 HRC) for die and shaft parts needing a hardness-toughness compromise; avoid tempering in the 450–550 °C embrittlement range. | 1,300 | 1,550 | 6 | 47 HRC | — |
Hardened 1000–1050 °C, tempered 180–250 °C | Use hardening at 1000–1050 °C with a 180–250 °C temper (~52–54 HRC) for knives, surgical blades and wear parts; toughness drops to 3% elongation and machining is nearly impossible. | 1,500 | 1,800 | 3 | 53 HRC | — |
What is 1.4028 +CR?
1.4028 +CR is 1.4028 supplied in the +CR condition — use cold rolled hard strip for blanking blades and shims that are hardened after stamping; 900 MPa tensile comes with 8% elongation and limited bending capability. 1.4028 +CR has a yield strength of 700 MPa (102 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 92% of stainless steel grades. Elongation at break is 8% and the elastic modulus is 215 GPa (31.2 Msi). 1.4028 +CR has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,450°C (2,642 °F). +A is the default condition FabDigit quotes; +CR is available on request or by drawing note.
Advantages
- Conducts heat well — 30 W/m·K (17.3 BTU/hr·ft·°F), better than 99% of stainless steel grades
- High electrical conductivity — 3.1 % IACS, better than 99% of stainless steel grades
- High strength — 700 MPa (102 ksi), better than 92% of stainless steel grades
- Polishes to a fine finish — 80/100, better than 89% of stainless steel grades
- Easy to machine — 45/100, better than 84% of stainless steel grades
Limitations
- Limited ductility — 8%, worse than 99% of stainless steel grades
- Limited service temperature — 250°C (482 °F), worse than 99% of stainless steel grades
- Difficult to weld — 20/100, worse than 95% of stainless steel grades
- Needs corrosion protection — 40/100, worse than 93% of stainless steel grades
- Limited formability — 25/100, worse than 78% of stainless steel grades
1.4028 +CR properties
Typical room-temperature values for 1.4028 +CR; 22 are specific to this condition. Other listed values are 1.4028 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4028 +CR has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Mechanical15
1.4028 +CR has a yield strength of 700 MPa (102 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 92% of stainless steel grades. Elongation at break is 8% and the elastic modulus is 215 GPa (31.2 Msi).
Thermal6
1.4028 +CR is rated for continuous service to 250°C (482 °F). It conducts heat at 30 W/m·K (17.3 BTU/hr·ft·°F), better than 99% of stainless steel grades. Thermal expansion is 10.5 µm/m·K (5.83 µin/in·°F).
Electrical3
1.4028 +CR conducts electricity at 3.1 % IACS, better than 99% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (40/100), worse than 93% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4028 +CR takes about 48 MJ of energy and emits 4 kg of CO₂ — less than 85% of stainless steel grades. Typical recycled content is 60%.
Manufacturability8
1.4028 +CR's machinability is fair (45/100, better than 84% of stainless steel grades); weldability poor (20/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4028 +CR
Is 1.4028 easy to machine?
Machine annealed with sharp cobalt HSS or coated carbide at reduced speeds and with plenty of coolant. Above 45 HRC the grade is essentially grind-only, or turned with CBN.
Can 1.4028 be welded?
Weldability is poor: preheat to 150–300 °C, use low-hydrogen matching or austenitic filler, and temper immediately at 700–750 °C to prevent cold cracking and martensite embrittlement.
Can 1.4028 be formed, bent or molded?
Only mild cold bending, blanking and roll forming in the annealed condition; re-harden and temper afterwards to restore properties. Hot forming range is approximately 1100–850 °C followed by slow cooling.
What surface finishes work on 1.4028?
After quench and temper it polishes to a mirror finish and should be passivated for best corrosion resistance. PVD (TiN/CrN) or hard chrome raises wear life; the grade cannot be anodised.
1.4028 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 10088-3 X30Cr13 | 0.26 – 0.35 | 0.3 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.5 |
| P | ≤ 0.04 | — |
| Sfree-machining variant 1.4029 has S 0.15–0.35 | ≤ 0.03 | — |
| Cr | 12 – 14 | 13 |
| Niresidual, some mill specs | ≤ 0.5 | — |
| Moresidual | ≤ 0.5 | — |
| Fe | balance | — |
1.4028 +CR — frequently asked
What is 1.4028 +CR used for?
1.4028 +CR is typically used for knives, surgical instruments, scissors and valve seats. In short: 52–54 HRC after hardening; cutlery-grade 13% Cr; poor weldability.
What is the yield strength of 1.4028 +CR?
1.4028 +CR has a typical yield strength of 700 MPa (102 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 92% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is 1.4028 +CR easy to machine?
Reasonably — machinability is rated fair (45/100, better than 84% of stainless steel grades). Machine annealed with sharp cobalt HSS or coated carbide at reduced speeds and with plenty of coolant. Above 45 HRC the grade is essentially grind-only, or turned with CBN.
Can 1.4028 +CR be welded?
Not readily — weldability is rated poor (20/100). Weldability is poor: preheat to 150–300 °C, use low-hydrogen matching or austenitic filler, and temper immediately at 700–750 °C to prevent cold cracking and martensite embrittlement.
What surface finishes work on 1.4028 +CR?
After quench and temper it polishes to a mirror finish and should be passivated for best corrosion resistance. PVD (TiN/CrN) or hard chrome raises wear life; the grade cannot be anodised.
Can 1.4028 +CR be formed, bent or molded?
Only mild cold bending, blanking and roll forming in the annealed condition; re-harden and temper afterwards to restore properties. Hot forming range is approximately 1100–850 °C followed by slow cooling.
What is the maximum service temperature of 1.4028 +CR?
1.4028 +CR 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.
Sources
- EN 10088-3 Stainless steels – Semi-finished products, bars, rods — CEN (2014)
- EN 10088-1 Stainless steels – List of stainless steels — CEN (2014)
- GB/T 1220 (3Cr13/30Cr13) — SAC (2007)
- JIS G 4303 Stainless steel bars (SUS420J2) — JSA (2021)
- ASM Handbook Vol.1: Properties and Selection – Irons, Steels — ASM International (1990)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- Martensitic stainless bar/strip datasheets (X30Cr13 / 420) — Outokumpu / Böhler / Sandvik (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.