Steel A607 Grade 70
ASTM A607 Grade 70
A607 Grade 70 is the higher-strength member of the A607 columbium/vanadium micro-alloyed HSLA sheet family, supplied hot-rolled, HRPO or cold-rolled in Class 1 and Class 2.
Reference datasheet — A607 Grade 70 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the HR-CL1 condition
A607 Grade 70 tempers and conditions
A607 Grade 70 is supplied in 5 conditions, soft to hard. HR-CL1 is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot-Rolled, Class 2 | Pick when weldability and bend performance matter more than peak tensile: same 485 MPa yield but a lower minimum tensile (550 MPa) and leaner carbon. | 510 | 585 | 18 | 175 HB | 9 % IACS |
HR-CL1Default Hot-Rolled, Class 1 | Standard stocked condition: maximum strength per unit weight for chassis, frames and heavy brackets where forming is moderate. | 515 | 620 | 16 | 185 HB | — |
Cold-Rolled, Class 2 | Thin-gauge cold-rolled option when resistance-spot-welded assemblies and bending demand the leaner Class 2 chemistry. | 515 | 595 | 15 | 180 HB | 9 % IACS |
Hot-Rolled Pickled & Oiled, Class 1 | Scale-free hot-rolled coil for laser cutting, roll forming and direct painting without shot blasting. | 515 | 620 | 16 | 185 HB | 9 % IACS |
Cold-Rolled, Class 1 | Use for thin gauge, tight thickness tolerance and a smooth paintable surface; ductility is lower than hot-rolled. | 525 | 630 | 13 | 195 HB | 9 % IACS |
What is A607 Grade 70?
A607 Grade 70 is the higher-strength member of the A607 columbium/vanadium micro-alloyed HSLA sheet family, supplied hot-rolled, HRPO or cold-rolled in Class 1 and Class 2. Default properties are 515 MPa yield, 620 MPa tensile, 16 % elongation and 185 HB (92 HRB), which lets designers down-gauge stampings and rolled sections for weight reduction. The cost is reduced formability and high springback compared with Grade 50, plus higher punching forces and no inherent corrosion resistance. Drop to A607 Grade 50 where deep or tight forming controls the design. A607 Grade 70 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,495°C (2,723 °F). A607 Grade 70 has a yield strength of 515 MPa (74.7 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 66% of steel grades. Elongation at break is 16% and the elastic modulus is 205 GPa (29.7 Msi).
What is A607 Grade 70 used for?
- truck frame components
- wheel rims
- structural stampings
Advantages
- Readily welded — 72/100, better than 75% of steel grades
Limitations
- Hard to polish — 45/100, worse than 84% of steel grades
A607 Grade 70 properties
Typical room-temperature values for A607 Grade 70-HR-CL1; bars are the position among steel grades.
Physical3
A607 Grade 70 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,495°C (2,723 °F).
Mechanical14
A607 Grade 70 has a yield strength of 515 MPa (74.7 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 66% of steel grades. Elongation at break is 16% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
A607 Grade 70 is rated for continuous service to 350°C (662 °F). It conducts heat at 45 W/m·K (26 BTU/hr·ft·°F), better than 66% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
A607 Grade 70 conducts electricity at 9 % IACS, better than 71% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of A607 Grade 70 takes about 25 MJ of energy and emits 2.1 kg of CO₂ — less than 82% of steel grades. Typical recycled content is 25%.
Manufacturability7
A607 Grade 70's machinability is fair (48/100, worse than 57% of steel grades); weldability very good (72/100); formability fair (48/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the steel family
Yield strength against density for every steel grade FabDigit runs. A607 Grade 70 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with A607 Grade 70
Is A607 Grade 70 easy to machine?
Machines like a 500 MPa-class carbon steel — use rigid setups, coated carbide and positive rake; punching requires ~1.4× the force of mild steel and larger die clearance.
Can A607 Grade 70 be welded?
Low carbon equivalent gives good GMAW/GTAW/RSW weldability with ER70S-6 (Class 2 preferred for heavy weldments); avoid excessive heat input, which dissolves Nb/V precipitates and softens the HAZ.
Can A607 Grade 70 be formed, bent or molded?
Cold-formable but with high springback and limited stretch — use generous bend radii (≥2–3 t transverse to rolling), bend across the rolling direction, and allow for a 3–8° overbend.
A607 Grade 70 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 |
|---|---|---|
| Cheat analysis maximum; Class 2 heats are usually leaner | ≤ 0.26 | 0.1 |
| Mnmaximum for Grades 65 and 70 | ≤ 1.65 | 1.3 |
| P | ≤ 0.04 | 0.02 |
| Ssulfide shape control common for improved formability | ≤ 0.04 | 0.01 |
| Siproducer practice; not always a specification limit | ≤ 0.9 | 0.2 |
| Nbcolumbium; Nb and/or V must total the micro-alloy addition | 0.01 – 0.05 | 0.03 |
| Valternative or supplement to Nb | 0.01 – 0.15 | 0.06 |
| Nused with V for precipitation strengthening | ≤ 0.02 | 0.01 |
| Fe | balance |
What surface finishes work on A607 Grade 70?
No inherent corrosion resistance: specify pickling or blasting, then phosphate + e-coat, powder coat, zinc plating or hot-dip galvanizing; anodizing is not applicable.
Surface treatments FabDigit runs on steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel A607 Grade 70 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- A607-70
How much does A607 Grade 70 cost?
A607 Grade 70 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
A607 Grade 70 — frequently asked
What is A607 Grade 70 used for?
A607 Grade 70 is typically used for truck frame components, wheel rims and structural stampings. In short: 70 ksi HSLA sheet; thinner gauge, same load; less formable than Grade 50.
What is the yield strength of A607 Grade 70?
A607 Grade 70 has a typical yield strength of 515 MPa (74.7 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 66% of steel grades. Strength varies by condition: see the 5 listed tempers.
Is A607 Grade 70 easy to machine?
Reasonably — machinability is rated fair (48/100, worse than 57% of steel grades). Machines like a 500 MPa-class carbon steel — use rigid setups, coated carbide and positive rake; punching requires ~1.4× the force of mild steel and larger die clearance.
Can A607 Grade 70 be welded?
Yes — weldability is rated very good (72/100). Low carbon equivalent gives good GMAW/GTAW/RSW weldability with ER70S-6 (Class 2 preferred for heavy weldments); avoid excessive heat input, which dissolves Nb/V precipitates and softens the HAZ.
What surface finishes work on A607 Grade 70?
No inherent corrosion resistance: specify pickling or blasting, then phosphate + e-coat, powder coat, zinc plating or hot-dip galvanizing; anodizing is not applicable.
Can A607 Grade 70 be formed, bent or molded?
Cold-formable but with high springback and limited stretch — use generous bend radii (≥2–3 t transverse to rolling), bend across the rolling direction, and allow for a 3–8° overbend.
What is the maximum service temperature of A607 Grade 70?
A607 Grade 70 is rated for continuous use to about 350°C (662 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between A607 Grade 70 HR-CL1 and A607 Grade 70 CR-CL1?
HR-CL1 is the default condition — standard stocked condition: maximum strength per unit weight for chassis, frames and heavy brackets where forming is moderate. CR-CL1: use for thin gauge, tight thickness tolerance and a smooth paintable surface; ductility is lower than hot-rolled. Yield strength is 515 MPa in HR-CL1 versus 525 MPa in CR-CL1.
How much does A607 Grade 70 cost?
A607 Grade 70 is a budget-cost steel ($), cheaper than about 90% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM A607 — Steel, Sheet and Strip, HSLA, Columbium or Vanadium, or Both, Hot-Rolled and Cold-Rolled (withdrawn, replaced by A1011/A1018) — ASTM International (2004)
- ASTM A1011/A1011M — HSLAS and HSLAS-F Hot-Rolled Sheet and Strip — ASTM International (2018)
- ASTM A1008/A1018 — Cold-Rolled HSLAS Sheet — ASTM International (2020)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (HSLA sheet steels) — ASM International (1990)
- ASTM A370 — Mechanical Testing of Steel Products (hardness conversions) — ASTM International (2022)
- worldsteel Life Cycle Inventory — hot-rolled coil — World Steel Association (2021)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.