Steel 22MnB5 · supply condition · default condition
Steel 22MnB5-CR
Properties of the CR condition, compared with the other 22MnB5 tempers.
Standard soft blank stock for direct hot stamping and for cold blanking/piercing before the press-hardening line.
What is 22MnB5-CR?
22MnB5-CR is 22MnB5 supplied in the CR condition — standard soft blank stock for direct hot stamping and for cold blanking/piercing before the press-hardening line. 22MnB5-CR has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 67% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi). 22MnB5-CR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,465°C (2,669 °F).
Limitations
- Limited service temperature — 250°C (482 °F), worse than 85% of steel grades
- Poor heat conductor — 32 W/m·K (18.5 BTU/hr·ft·°F), worse than 82% of steel grades
22MnB5-CR properties
Typical room-temperature values for 22MnB5-CR — 11 properties are specific to this condition; the rest are grade-level values shared by every 22MnB5 temper. Each bar shows where the value sits among the steel grades in FabDigit's library — further right is higher.
Physical3
22MnB5-CR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,465°C (2,669 °F).
Mechanical14
22MnB5-CR has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 67% of steel grades. Elongation at break is 22% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
22MnB5-CR is rated for continuous service to 250°C (482 °F). It conducts heat at 32 W/m·K (18.5 BTU/hr·ft·°F), worse than 82% of steel grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
22MnB5-CR conducts electricity at 8 % IACS, better than 55% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of 22MnB5-CR takes about 25 MJ of energy and emits 2.1 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 20%.
Manufacturability7
22MnB5-CR's machinability is good (55/100, better than 62% of steel grades); weldability good (65/100); formability good (60/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other 22MnB5 tempers and conditions
22MnB5 is also supplied in 6 other conditions. The full side-by-side table is on the 22MnB5 overview.
- CRDefaultStandard soft blank stock for direct hot stamping and for cold blanking/piercing before the press-hardening line.380 MPa yield · 160 HB
- PHSThe in-service condition of hot-stamped B-pillars, bumper beams and roof rails — maximum strength, minimum springback, very low ductility.1,100 MPa yield · 48 HRC
- PHS-SZLocal ductile zone in a hot-stamped part (heated die, tailored tempering or post-tempering) for controlled crash folding and easier joining.450 MPa yield · 20 HRC
- HRThicker gauges (roughly 2–6 mm) for chassis and heavy structural hot-stamped parts.400 MPa yield · 175 HB
Working with 22MnB5-CR
Is 22MnB5 easy to machine?
Blank, pierce and trim in the soft as-delivered state; after press hardening use laser cutting or CBN/ceramic tooling — conventional drilling and shearing of 1500 MPa martensite is impractical.
Can 22MnB5 be welded?
Resistance spot welding is standard (Al-Si coated requires adapted current/force schedules; Zn coating risks liquid-metal embrittlement); laser welding of Al-Si blanks needs coating ablation at the joint, and any welding softens the martensite in the HAZ.
Can 22MnB5 be formed, bent or molded?
Direct hot stamping: austenitize 900–950 °C for 3–6 min, transfer in <10 s, form and hold in the water-cooled die at >27 °C/s cooling to full martensite; cold forming is limited to the soft delivered state and bend radii after hardening should be ≥3–4 t.
What surface finishes work on 22MnB5?
Al-Si coated parts go straight to phosphate-free pretreatment and e-coat; uncoated hot-stamped parts must be shot blasted to remove scale, and electroplating/acid pickling should be avoided due to hydrogen embrittlement risk.
22MnB5 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 | 0.19 – 0.25 | 0.22 |
| Si | 0.15 – 0.4 | 0.25 |
| Mn | 1.1 – 1.4 | 1.25 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.01 | 0 |
| Cr | 0.15 – 0.35 | 0.22 |
| Alacid-soluble | 0.02 – 0.06 | 0.04 |
| Tibinds N so that B stays in solution | 0.02 – 0.05 | 0.04 |
| Bhardenability agent | 0 – 0.01 | 0 |
| N | ≤ 0.01 | 0.01 |
| Curesidual | ≤ 0.2 | 0.03 |
| Niresidual | ≤ 0.2 | 0.03 |
| Moresidual/optional | ≤ 0.1 | 0.02 |
| Fe | balance | — |
22MnB5-CR — frequently asked
What is 22MnB5-CR used for?
22MnB5-CR is typically used for A- and B-pillar reinforcements, door-impact beams, roof rails and side-sill reinforcements, bumper beams, tunnel and floor cross-members and front and rear longitudinal rails. In short: workhorse hot-stamping boron.
What is the yield strength of 22MnB5-CR?
22MnB5-CR has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 560 MPa (81.2 ksi) — weaker than 67% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is 22MnB5-CR easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Blank, pierce and trim in the soft as-delivered state; after press hardening use laser cutting or CBN/ceramic tooling — conventional drilling and shearing of 1500 MPa martensite is impractical.
Can 22MnB5-CR be welded?
Yes — weldability is rated good (65/100). Resistance spot welding is standard (Al-Si coated requires adapted current/force schedules; Zn coating risks liquid-metal embrittlement); laser welding of Al-Si blanks needs coating ablation at the joint, and any welding softens the martensite in the HAZ.
What surface finishes work on 22MnB5-CR?
Al-Si coated parts go straight to phosphate-free pretreatment and e-coat; uncoated hot-stamped parts must be shot blasted to remove scale, and electroplating/acid pickling should be avoided due to hydrogen embrittlement risk.
Can 22MnB5-CR be formed, bent or molded?
Direct hot stamping: austenitize 900–950 °C for 3–6 min, transfer in <10 s, form and hold in the water-cooled die at >27 °C/s cooling to full martensite; cold forming is limited to the soft delivered state and bend radii after hardening should be ≥3–4 t.
What is the maximum service temperature of 22MnB5-CR?
22MnB5-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.
What is the difference between 22MnB5-CR and 22MnB5-PHS?
CR is the default condition — standard soft blank stock for direct hot stamping and for cold blanking/piercing before the press-hardening line. PHS: the in-service condition of hot-stamped B-pillars, bumper beams and roof rails — maximum strength, minimum springback, very low ductility. Yield strength is 380 MPa in CR versus 1,100 MPa in PHS.
Can FabDigit make parts in 22MnB5-CR?
Yes — 22MnB5-CR is available for sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- EN 10083-3 — Steels for quenching and tempering: alloy steels (1.5528 / 22MnB5) — CEN (2006)
- VDA 239-100 — Sheet steel for cold forming / press hardening steels — VDA (2016)
- Usibor 1500 / press hardenable steels product data — ArcelorMittal (2023)
- MBW 1500 press-hardening steel datasheet — thyssenkrupp Steel (2022)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
- Hot Stamping of Ultra High Strength Steels (Karbasian & Tekkaya review data) — Elsevier / Springer (2010)
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.