Steel 22MnB5 · supply condition
Steel 22MnB5-HR
Properties of the HR condition, compared with the other 22MnB5 tempers.
Thicker gauges (roughly 2–6 mm) for chassis and heavy structural hot-stamped parts.
What is 22MnB5-HR?
22MnB5-HR is 22MnB5 supplied in the HR condition — thicker gauges (roughly 2–6 mm) for chassis and heavy structural hot-stamped parts. 22MnB5-HR has a yield strength of 400 MPa (58 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 60% of steel grades. Elongation at break is 20% and the elastic modulus is 210 GPa (30.5 Msi). 22MnB5-HR 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). CR is the default condition FabDigit quotes; HR is available on request or by drawing note.
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-HR properties
Typical room-temperature values for 22MnB5-HR — 8 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-HR 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-HR has a yield strength of 400 MPa (58 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 60% of steel grades. Elongation at break is 20% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
22MnB5-HR 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-HR 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-HR 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-HR's machinability is good (55/100, better than 62% of steel grades); weldability good (65/100); formability good (55/100).
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-HR
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-HR — frequently asked
What is 22MnB5-HR used for?
22MnB5-HR 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-HR?
22MnB5-HR has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 600 MPa (87 ksi) — weaker than 60% of steel grades. Strength varies by condition: see the 7 listed tempers.
Is 22MnB5-HR 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-HR 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-HR?
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-HR 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-HR?
22MnB5-HR 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-HR?
Yes — 22MnB5-HR 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.