AISI 1345 Steel Plate Specifications

AISI/SAE 1345 (UNS G13450) Mn alloy steel is a high-manganese alloy steel (bar/forging forms as ordered) grade under AISI/SAE 1345; UNS G13450; ASTM A29 chemistry practice for bar. This specification page covers grade identity, chemistry, mechanical requirements, related grades, and RFQ practice. Accept material against the ordered edition and the mill test certificate.

Grade Identity and Delivery Condition

AISI/SAE 1345 Mn alloy steel is supplied for projects that name this designation on the purchase order or calculation sheet. Standard delivery condition is As-rolled / annealed / quenched-and-tempered / cold-finished per order. Gangsteel supplies export plate and related products with EN 10204 documentation. Do not accept an alternate heat-treatment route unless a written concession changes the specification requirement.

Chemical Composition - Heat Analysis (AISI/SAE 1345 Mn alloy steel)

Standard AISI 1345 heat analysis (Mn alloy; no mandatory Ni/Cr/Mo).

Element / rule	Requirement
C	0.43-0.48
Mn	1.60-1.90
Si	0.15-0.35
P, max	0.035
S, max	0.040

Mechanical Properties (AISI/SAE 1345 Mn alloy steel)

Confirm thickness, specimen orientation, and any supplementary impact, UT, or hardness requirements on the PO.

Property	Requirement
Tensile / yield / elongation	Condition-dependent - use MTC
Hardness	Condition-dependent - use MTC
Note	AISI designation defines chemistry; mechanicals follow the ordered product form and heat treatment

Related / Near-Equivalent Grades

Near-equivalents are for cross-reference only. They are not automatic code substitutes. Substitution requires engineer approval and matching certificate scope.

System	Grade	Note
UNS	G13450	Unified number
Near	AISI 1335 / 1340	Adjacent SAE grades

Frequently Asked Questions

What is AISI/SAE 1345 Mn alloy steel?

AISI/SAE 1345 (UNS G13450) Mn alloy steel is a high-manganese alloy steel (bar/forging forms as ordered) under AISI/SAE 1345; UNS G13450; ASTM A29 chemistry practice for bar. It is ordered when drawings or the calculation sheet name this designation specifically.

What chemical composition applies to AISI/SAE 1345 Mn alloy steel?

Controlled elements and limits are tabulated above from the governing standard. Always verify the heat analysis on the MTC against the ordered edition.

What mechanical properties should buyers expect for AISI/SAE 1345 Mn alloy steel?

Tensile, yield, elongation, and related limits are tabulated above. Design allowables must come from the applicable pressure-vessel or structural code, not from a web summary.

What delivery condition is required for AISI/SAE 1345 Mn alloy steel?

Standard delivery is As-rolled / annealed / quenched-and-tempered / cold-finished per order. State it explicitly on the PO. Do not accept an alternate route without a written concession.

How does AISI/SAE 1345 Mn alloy steel differ from near-equivalent grades?

Near-equivalents may differ in carbon or alloy bands, tensile class, impact temperature, or heat treatment. Substitution needs engineering approval and matching certificate scope.

How do I RFQ AISI/SAE 1345 Mn alloy steel from Gangsteel?

Send AISI/SAE 1345 (UNS G13450) Mn alloy steel, thickness x width x length, quantity or tonnage, delivery condition, optional impact/UT/Z tests, EN 10204 3.1 or 3.2, destination, and any dual-mark needs. Gangsteel replies with mill options, lead time, and packing notes.

Ordering and Mill Certificates

State grade AISI/SAE 1345 (UNS G13450) Mn alloy steel, dimensions, quantity, delivery condition, optional NDT/PMI, and certificate (EN 10204 3.1 standard; 3.2 when third-party inspection is ordered). Gangsteel supplies export plate and related products with mill test certificates. Contact Gangsteel for stock and mill production RFQs.