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Introduction
JIS G 3118 specifies
hot-rolled carbon steel plates primarily intended for pressure vessels
operating at intermediate and moderate temperatures. These plates are designed
to provide suitable strength, weldability and mechanical performance for
pressure-containing equipment and industrial fabrication.
Ladhani Metal Corporation
supplies JIS G 3118 carbon steel pressure vessel plates in different grades,
thicknesses and delivery conditions on an order basis.
Applicable Standard
JIS G 3118:2024 – Carbon
steel plates for pressure vessels for intermediate and moderate temperature
services.
The 2024 edition was
published on 20 November 2024 and is listed as valid by the Japanese Standards
Association. It specifies requirements for hot-rolled carbon steel plates
primarily used in pressure vessels.
Material Type
JIS G 3118 steel plates are
classified as:
·
Carbon
Steel (CS)
·
Pressure
Vessel Steel
·
Boiler
and Pressure Equipment Steel
·
Hot-Rolled
Carbon Steel
·
Weldable
Pressure Vessel Plate Steel
These materials are selected
for pressure-containing equipment requiring controlled chemical composition,
appropriate mechanical strength and suitable fabrication characteristics.
Scope
JIS G 3118 covers hot-rolled
carbon steel plates intended mainly for pressure vessels operating at
intermediate and moderate temperatures.
Typical applications include:
·
Pressure
vessel fabrication
·
Industrial
process vessels
·
Boiler-related
equipment, where the grade is suitable
·
Heat
exchangers
·
Storage
tanks designed for pressure service
·
Chemical
processing equipment
·
Petrochemical
equipment
·
Industrial
pressure-containing components
The selected grade must meet
the applicable design code, operating conditions and pressure vessel
requirements.
Chemical Composition
The chemical composition of
JIS G 3118 plates is controlled to provide suitable strength, weldability and
pressure vessel fabrication performance. Carbon limits vary according to grade
and plate thickness. The following table provides a general reference for the
principal elements.
|
Grade |
Carbon
(C), % |
Silicon
(Si), % |
Manganese
(Mn), % |
Phosphorus
(P), max. % |
Sulfur
(S), max. % |
|
SGV410 |
Thickness-dependent; approximately
0.21–0.27 max. |
0.15–0.40 |
Generally 0.85–1.20 |
0.030 |
0.030 |
|
SGV450 |
Thickness-dependent; approximately
0.24–0.29 max. |
0.15–0.40 |
Generally 0.85–1.20 |
0.030 |
0.030 |
|
SGV480 |
Thickness-dependent; approximately
0.27–0.31 max. |
0.15–0.40 |
Generally 0.85–1.20 |
0.030 |
0.030 |
The figures above are general
reference values and are not a substitute for the complete thickness-specific
requirements of JIS G 3118:2024. Chemical composition, including any additional
requirements, must be confirmed against the current standard and purchase
specification.
Mechanical Properties
The mechanical properties of
JIS G 3118 plates depend on the grade, plate thickness and specified test
conditions. The nominal tensile strength classes are shown below.
|
Grade |
Tensile Strength Class |
Yield Strength |
|
SGV410 |
410 MPa class |
Thickness-dependent |
|
SGV450 |
450 MPa class |
Thickness-dependent |
|
SGV480 |
480 MPa class |
Thickness-dependent |
Exact minimum yield strength,
tensile strength range and elongation requirements should be verified against
JIS G 3118:2024 for the ordered grade and thickness.
Manufacturing Process
JIS G 3118 steel plates are
produced through controlled steelmaking and hot-rolling processes.
Common manufacturing steps
include:
·
Steelmaking
and chemical composition control
·
Continuous
casting or ingot casting
·
Slab
preparation and reheating
·
Hot
rolling
·
Controlled
cooling
·
Straightening
·
Surface
conditioning
·
Cutting
to required dimensions
Manufacturing parameters are
selected according to the grade, plate thickness and required mechanical
properties.
Manufacturing Conditions
JIS G 3118 plates can be
supplied in manufacturing conditions suitable for pressure vessel applications,
according to the grade and order requirements.
Common conditions may
include:
·
As
rolled, where permitted
·
Normalized
·
Other
specified heat-treated conditions
·
Straightened
and finished
·
Cut-to-length
The permitted manufacturing
condition should be confirmed against the applicable grade requirements and
purchase specification.
Heat Treatment
Heat treatment depends on the
specified grade, thickness and delivery requirements.
Possible conditions include:
·
As-rolled
condition, where permitted
·
Normalizing
·
Stress
relieving after fabrication, where required by the applicable design code or
procedure
·
Other
heat treatment specified by the purchaser and permitted by the standard
The required condition should
be specified when placing the order.
Surface Finish
JIS G 3118 steel plates can
be supplied with different surface finishes according to customer requirements.
Common options include:
·
Hot-rolled
mill finish
·
Descaled
finish
·
Shot-blasted
finish
·
Pickled
finish
·
Pickled
and oiled finish, where suitable
·
Primer-coated
finish
·
Customized
surface preparation
The surface finish should be
selected according to storage, fabrication, coating and service requirements.
Delivery Condition
JIS G 3118 pressure vessel
plates can be supplied in suitable delivery conditions according to the
specified grade and order requirements.
Typical options include:
·
As
rolled, where permitted
·
Normalized,
where specified
·
Heat-treated
condition as required
·
Descaled
·
Shot
blasted
·
Cut-to-length
·
Customized
delivery condition
The specified grade, plate
thickness and delivery condition should be clearly stated in the purchase
order.
Dimensions and Tolerances
JIS G 3118 steel plates are
supplied according to the applicable dimensional, shape, mass and tolerance
requirements. JIS G 3193 covers dimensions, shape, mass and permissible
variations for hot-rolled steel plates, sheets and strips.
Available dimensions may
include:
·
Standard
plate thicknesses
·
Custom
thicknesses
·
Standard
widths
·
Custom
widths
·
Standard
lengths
·
Heavy
pressure vessel plates
·
Cut-to-length
plates
·
Customized
dimensions according to order requirements
Actual availability depends
on grade, thickness, manufacturing capability and order quantity.
Pressure Vessel Steel Characteristics
JIS G 3118 carbon steel
plates offer characteristics suitable for pressure vessel fabrication,
including:
·
Controlled
chemical composition
·
Suitable
tensile strength
·
Weldability
for pressure vessel construction
·
Hot-rolled
plate availability
·
Multiple
strength grades
·
Suitability
for intermediate and moderate temperature service
·
Compatibility
with industrial fabrication processes
Material selection must
account for operating pressure, temperature, plate thickness, welding procedure
and the applicable vessel design code.
Forms of Supply
Ladhani Metal Corporation can
supply JIS G 3118 materials in the following forms, subject to availability:
·
Carbon
steel pressure vessel plates
·
Boiler
and pressure equipment plates
·
Hot-rolled
steel plates
·
Heavy
steel plates
·
Cut-to-size
plates
·
Cut-to-length
plates
·
Custom
dimensions
Applications
JIS G 3118 carbon steel
plates are used in:
·
Pressure
vessels
·
Industrial
process vessels
·
Heat
exchangers
·
Petrochemical
equipment
·
Chemical
processing equipment
·
Pressure
storage vessels
·
Industrial
equipment housings
·
Fabricated
pressure-containing components
·
General
pressure equipment designed for suitable temperature service
The final material selection
must be based on the equipment design, service conditions and applicable
construction code.
Key Features
·
JIS
G 3118:2024 specification
·
Carbon
Steel (CS) and Mild Steel (MS) material category
·
Three
principal grades: SGV410, SGV450 and SGV480
·
Hot-rolled
pressure vessel steel plates
·
Controlled
chemical composition
·
Suitable
mechanical strength
·
Weldable
carbon steel grades
·
Suitable
for intermediate and moderate temperature service
·
Multiple
plate thicknesses and dimensions
·
Custom
supply available on order
Availability
JIS G 3118 carbon steel
plates are available on order basis from Ladhani Metal Corporation.
Availability depends on:
·
Required
grade
·
Plate
thickness
·
Width
and length
·
Delivery
condition
·
Heat-treatment
requirements
·
Order
quantity
·
Required
inspection documentation
Conclusion
JIS G 3118 specifies
hot-rolled carbon steel plates primarily used in pressure vessels operating at
intermediate and moderate temperatures. Its SGV410, SGV450 and SGV480 grades
offer different strength classes for pressure vessel fabrication and related
industrial applications.
Ladhani Metal Corporation
supplies JIS G 3118 carbon steel pressure vessel plates in required grades,
dimensions and delivery conditions on an order basis.
To place an order or enquiry,
contact Ladhani Metal Corporation.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
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