ASTM A 291 Grade 6 Class G Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country/Standard: United States / ASTM

Data updates

Latest Update: 2019-03

Total number of updates: 1

Update History

This material has 61 properties — only a subset is shown here.

Unlock full material properties, including detailed values across temperatures and conditions.

ASTM A 291 Grade 6 Class G Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.35 – 0.50

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

≥ 0.60

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

≤ 0.35

UNIT

CAS NUMBER

7440-50-8

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-02-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

A291/A291M: 2019 / Standard Specification for Steel Forgings, Carbon and Alloy, for Pinions, Gears and Shafts for Reduction Gears

Looking for full material performance data?

ASTM A 291 Grade 6 Class G Physical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

Unlock full details

Density

7.67 — 7.86 kg/dm³

Unlock full details

Poisson Coefficient

0.27 — 0.3

Unlock full details

This material has 61 properties — only a subset is shown here.

Unlock detailed physical values across temperatures and conditions.

ASTM A 291 Grade 6 Class G Heat Treatments

Heated to a suitable temperature for a sufficient length of time for austenitization and shall be suitably cooled to bring about complete transformation. Forgings may be immediately treated for mechanical properties after preliminary heat treatment or they may be preliminarily machined prior to treatment for mechanical properties.
Forging shall be reheated to a temperature above the upper critical temperature and held a sufficient length of time for complete austenitization; air cooled.
Minimum tempering temperature at 565°C (1050°F); cooled in the furnace at a max. rate of 55°C (100°F) per hour to 315°C (600°F).
If the manufacturer elects to heat treat for mechanical properties prior to machining, the forgings shall be stress relieved after machining at a temperature that is 30 - 55°C (50 - 100°F) below the last previous tempering temperature but in no case below 540°C (1000°F); cooled under uniform conditions in the furnace at a maximum rate of 55°C ⁄hour (100°F/hour) - 315°C (600°F).

ASTM A 291 Grade 6 Class G Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Yield Strength, Rp0.2

val1 MPa

Unlock full details

Tensile Strength

930 MPa

Unlock full details

Elongation, A

10 %

Unlock full details

Reduction of Area

val1 %

Unlock full details

Impact Energy

val1 J

Unlock full details

Brinell Hardness (HB)

302 — 352

Unlock full details

Need complete mechanical properties to make the right choice?

Get complete data on strength, hardness, fatigue, and more.

Optimize material selection for your application - Book a Demo

11 Cross References

10 Composition
36 Mechanical Properties
3 Physical Properties
1 Heat Treatment
- Metallography
- Machinability

- Stress-Strain
- Formability
- Fatigue
- Fracture
- Creep

- Joints
- Coatings
- Dimensions
- Tribology

- Corrosion
- Ageing
- Weatherability
- Irradiation

- Total Suppliers