Steel J422-SR (Stress relieved)
Heat-treated state
Pick when residual stress or dimensional stability matters (thick or machined weldments, pressure parts); slightly lowers strength and hardness while improving ductility.
Values for the SR condition
Other J422 tempers and conditions
J422 is listed in 2 conditions; see the grade overview at J422.
- SR
- AW
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SRThis page Stress relieved | Pick when residual stress or dimensional stability matters (thick or machined weldments, pressure parts); slightly lowers strength and hardness while improving ductility. | 360 | 465 | 29 | 145 HB | 12 % IACS |
AWDefault As-welded deposit | Default condition for general structural and repair welding of mild steel; properties are those of the as-deposited weld metal. | 400 | 490 | 26 | 160 HB | 12 % IACS |
What is J422-SR?
J422-SR is J422 heat treated to SR — pick when residual stress or dimensional stability matters (thick or machined weldments, pressure parts); slightly lowers strength and hardness while improving ductility. J422-SR has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 465 MPa (67.4 ksi) — weaker than 72% of steel grades. Elongation at break is 29% and the elastic modulus is 205 GPa (29.7 Msi). J422-SR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,500°C (2,732 °F). AW is the default condition FabDigit quotes; SR is available on request or by drawing note.
Advantages
- High electrical conductivity — 12 % IACS, better than 99% of steel grades
- Readily welded — 95/100, better than 97% of steel grades
- Conducts heat well — 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades
- Ductile — tolerates forming and impact — 29%, better than 91% of steel grades
- Forms and bends easily — 66/100, better than 83% of steel grades
Limitations
- High embodied carbon — 2.6 kg CO₂/kg, worse than 87% of steel grades
J422-SR properties
Typical room-temperature values for J422-SR; 22 are specific to this condition. Other listed values are J422 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
J422-SR has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,500°C (2,732 °F).
Mechanical16
J422-SR has a yield strength of 360 MPa (52.2 ksi) and a tensile strength of 465 MPa (67.4 ksi) — weaker than 72% of steel grades. Elongation at break is 29% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
J422-SR is rated for continuous service to 400°C (752 °F). It conducts heat at 51 W/m·K (29.5 BTU/hr·ft·°F), better than 92% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
J422-SR conducts electricity at 12 % IACS, better than 99% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (10/100), worse than 86% of steel grades.
Sustainability4
Producing a kilogram of J422-SR takes about 35 MJ of energy and emits 2.6 kg of CO₂ — more than 87% of steel grades. Typical recycled content is 30%.
Manufacturability7
J422-SR's machinability is good (60/100, better than 83% of steel grades); weldability excellent (95/100); formability good (66/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with J422-SR
Is J422 easy to machine?
Deposited beads machine like mild steel but slag pockets and hard spots at the fusion line dull tools — grind the cap first and use carbide at moderate speed.
Can J422 be welded?
AC or DC (either polarity), all positions; keep a short arc, dry the electrodes at 70–120 °C for 1 h if damp, and preheat only for thick or restrained joints.
Can J422 be formed, bent or molded?
Not a wrought product form; the as-welded deposit tolerates moderate cold straightening or peening but avoid heavy cold working of the bead.
What surface finishes work on J422?
Remove all slag before painting; bare deposit rusts quickly, so phosphate + paint, zinc-rich primer or galvanizing is recommended for exposed work.
J422 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 |
|---|---|---|
| Cdeposit analysis, AWS A5.1 E6013 / GB/T 5117 E4303 | ≤ 0.2 | 0.09 |
| Mn | ≤ 1.2 | 0.45 |
| Si | ≤ 1 | 0.3 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.04 | 0.02 |
| Niresidual | ≤ 0.3 | — |
| Crresidual | ≤ 0.2 | — |
| Moresidual | ≤ 0.3 | — |
| Vresidual | ≤ 0.08 | — |
| Curesidual, incl. coating | ≤ 0.35 | — |
| Fe | balance | — |
J422-SR — frequently asked
What is J422-SR used for?
J422-SR is typically used for general mild steel fabrication, maintenance welding and light structural work. In short: most common mild-steel electrode; AC or DC, all positions; not low-hydrogen.
What is the yield strength of J422-SR?
J422-SR has a typical yield strength of 360 MPa (52.2 ksi) and a tensile strength of 465 MPa (67.4 ksi) — weaker than 72% of steel grades. Strength varies by condition: see the 2 listed tempers.
Is J422-SR easy to machine?
Reasonably — machinability is rated good (60/100, better than 83% of steel grades). Deposited beads machine like mild steel but slag pockets and hard spots at the fusion line dull tools — grind the cap first and use carbide at moderate speed.
Can J422-SR be welded?
Yes — weldability is rated excellent (95/100). AC or DC (either polarity), all positions; keep a short arc, dry the electrodes at 70–120 °C for 1 h if damp, and preheat only for thick or restrained joints.
What surface finishes work on J422-SR?
Remove all slag before painting; bare deposit rusts quickly, so phosphate + paint, zinc-rich primer or galvanizing is recommended for exposed work.
Can J422-SR be formed, bent or molded?
Not a wrought product form; the as-welded deposit tolerates moderate cold straightening or peening but avoid heavy cold working of the bead.
What is the maximum service temperature of J422-SR?
J422-SR 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.
What is the difference between J422-AW and J422-SR?
AW is the default condition — default condition for general structural and repair welding of mild steel; properties are those of the as-deposited weld metal. SR: pick when residual stress or dimensional stability matters (thick or machined weldments, pressure parts); slightly lowers strength and hardness while improving ductility. Yield strength is 400 MPa in AW versus 360 MPa in SR.
Sources
- GB/T 5117 — SAC/ (2012)
- AWS A5.1/A5.1M — Specification for Carbon Steel Electrodes for Shielded Metal Arc Welding (E6013) — AWS (2012)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels — ASM International (1990)
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.