Customers often ask DIECUT about the different steel grades and steel strength. This article provides an overview of some steel grades and links to more detailed information on steel grades from DIECUT’s steel suppliers.
Mild Steel Grade 250
Grade 250 Mild Steel is a medium strength structural steel plate product with nominal yield strength of 250 MPa.
Typical uses include:
- General Fabrication
- Structural members
- High-rise buildings
- Bridges
- Storage tanks
Often referred to as: MS, MS 250, Mild Steel, or simply Grade 250
More information: Bluescope MS250 information
Mild Steel Grade 350
Grade 350 Mild Steel is a medium Strength structural steel plate product with nominal yield strength of 350 MPa.
Typical uses include:
- General Fabrication
- Structural members
- High-rise buildings
- Bridges
- Storage tanks
often referred to as: MS 350, or simply Grade 350
More information: Bluescope M350 information
Duraflex K1042 or K1045 – Steel Grade 1042 or Steel Grade 1045 Steel
Is a heat treatable plate grade for general engineering applications. Grade 1042 is the Australian and/or New Zealand Duraflex and Grade 1045 is any overseas type of Duraflex.
Typical use:
- General Engineering parts
- Profile cut gears
- Wear or abrasion applications
Often referred to as: Dura, Duraflex, K1045, or K1042
More Information: Bluescope K1042 information
Boiler Plate (AS 1548-7 460 NR)
Is a fully killed, fine grained, carbon-manganese steel with a guaranteed minimum tensile strength of 430 MPa.
Typical uses include:
- Boilers
- Pressure Vessels
- Vessels where welding is required (plate is Weldable)
often referred to as: Boiler Plate
More Information: Bluescope AS1548 information
Bisalloy – Steel Grade 80, 400 or 500
Bisalloy is a steel plate is a high strength, low alloy steel plate with a yield strength three times that of carbon steel and featuring low carbon, excellent notch toughness, good weldability and formability.
Bisalloy is a quench and tempered plate that has various Tensile strength dependent on the Grade of steel;
- Bisalloy 80 has a typical tensile strength of 830 MPa
- Bisalloy 400 has a tensile strength of 1320 MPa
- Bisalloy 500 has a typical tensile strength of 1640 MPa
Typical uses include:
- Lining equipment
- Transport equipment
- Mining equipment
- Excavator buckets
- Bridges
- Dump truck wear liners
- Deflector plates
- Earth moving Buckets
Often referred to as: Bis, Bis 80, Bis 400, Bis 500
More Information: Bisalloy information (refer page 12)
Floor Plate (AS/NZS 3678-250)
Is a plate that is hot rolled and has minimum yield strength of 250 MPa and has a raised checkered surface on one side.
Typical use: Floorplate
Often referred to as: Floor plate
More Information: Bluescope Floorplate
Steel strength
Steel yield strength is the maximum stress that a material can withstand while being stretched or pulled before failing or breaking
Stress vs. strain curve typical of structural steel
1. Ultimate strength
2. Yield strength
3. Fracture
4. Strain hardening region
5. Necking region
A: Engineering stress
B: True stress