Steel A48 Class 30 vs EN-GJMW-400-5
Steel · grade comparison
Steel A48 Class 30 and EN-GJMW-400-5 are both steel grades. EN-GJMW-400-5 is the stronger of the two: yield strength 240 MPa (34.8 ksi) against 150 MPa (21.8 ksi) for A48 Class 30, about 60% more; tensile strength follows at 430 MPa (62.4 ksi) vs 214 MPa (31 ksi). EN-GJMW-400-5 is the more ductile: elongation 7% versus 0.6% for A48 Class 30, and A48 Class 30 is harder (210 HB vs 195 HB). A48 Class 30 is lighter (7.15 g/cm³ vs 7.4 g/cm³ for EN-GJMW-400-5) and EN-GJMW-400-5 is stiffer (175 GPa vs 100 GPa). On the shop floor, A48 Class 30 machines more easily (excellent vs good) and EN-GJMW-400-5 welds better (good vs poor).
A48 Class 30Choose it when weight is the constraint, or when the part sees heat.
EN-GJMW-400-5Choose it when strength drives the design, or when the part is bent, formed or impact-loaded.
A48 Class 30 vs EN-GJMW-400-5: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Reduction in Area
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Latent Heat of Fusion 220 J/g94.6 BTU/lb
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | A48 Class 30 | EN-GJMW-400-5 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $ Budget | $ Budget |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 9 finishes: Copper Plating, Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Manganese Phosphate, Plasma Spray, Silver Plating, Zinc Phosphate.
A48 Class 30 vs EN-GJMW-400-5 — frequently asked
Is EN-GJMW-400-5 stronger than A48 Class 30?
Yes. EN-GJMW-400-5 has a typical yield strength of 240 MPa (34.8 ksi) against 150 MPa (21.8 ksi) for A48 Class 30 — about 60% more. Tensile strength is 430 MPa (62.4 ksi) vs 214 MPa (31 ksi).
Which is cheaper, A48 Class 30 or EN-GJMW-400-5?
Both sit in the same relative cost tier ($, budget); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, A48 Class 30 or EN-GJMW-400-5?
A48 Class 30. Its machinability rates excellent (85/100) against good (68/100) for EN-GJMW-400-5; for welding the order is EN-GJMW-400-5 first (good, 60/100) then A48 Class 30 (poor, 30/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in A48 Class 30 and EN-GJMW-400-5 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.