AMS 6345 AISI 4130 Aircraft Steel Sheets and Plates

AMS 6345 AISI 4130 chrome-moly steel sheets/plates, normalised, weldable, vacuum degassed for aerospace & oil/gas. ZYTC Alloy supplies AMS/ASTM/MIL grades.

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AMS 6345 AISI 4130 is a popular through‑hardening low‑alloy chrome‑moly steel for aerospace and multi‑industrial use. As a trusted Chinese aerospace material supplier, ZYTC Alloy supplies AISI 4130 sheets, plates and other semi‑finished products complying with global aviation standards. This grade uses chromium and molybdenum as primary strengthening elements, valued for good weldability, convenient fabrication and moderate hardenability.

Material Characteristics

AISI 4130 exhibits comparable hardenability and weldability to 8630 (MIL‑S‑6250). Material can be vacuum‑degassed to satisfy magnetic particle inspection requirements under AMS 2301 for critical‑service aerospace parts.

Applicable Specifications

ZYTC Alloy's AISI 4130 material covers a full range of industry specifications:

AMS 6345 (Normalised Sheet / Plate)
AMS 6346 (Hardened & Tempered Bar)
AMS 6350, AMS 6351 (Sheet / Plate)
AMS 6348, AMS 6370 (Bar)
AMS 6371 (Tube)
MIL‑S‑6758, MIL‑S‑18729, MIL‑T‑67366
AISI 4130, ASTM A322, ASTM A331, S534, S535, UNS G41300

Product Availability

ZYTC Alloy provides AISI 4130 in diverse product forms: sheets, plates, tubes, rods, bars including rounds, squares, hexagons, flats, as well as welding wire. Custom dimensions and processing services are available upon request.

Chemical Composition
Weight%	C	Mn	P	S	Si	Cr	Ni	Mo	Cu
4130 Bar/Tube	0.28 - 0.33	0.40-0.60	0.025 max	0.025 max	0.15 - 0.35	0.80-1.10	0.25 max	0.15-0.25	0.35
4130 Sheet/Plate	0.28 - 0.33	0.40 - 0.60	0.025 max	0.025 max	0.20-0.35	0.80-1.10	-	0.15 - 0.25	-

Typical Mechanical Properties

Alloy	Condition	Thickness	Tensile Strength ksi	Yield Strength ksi	Elongation	Hardness
Tube AMS 6371	Cold Drawn	-	95	70	12	<25
Bar AMS 6370	Annealed	-	-	-	-	29HB Max
Bar AMS 6346	Hardened & Tempered	-	125	100	17	-
Sheet AMS 6350	Annealed	-	-	-	-	<25 HRC
Sheet AMS 6345	Normalised	<0.062"	95	75	8	-
Sheet AMS 6345	Normalised	0.062"- 0.125"	95	75	10	-
Sheet AMS 6345	Normalised	0.125"- 0.187"	95	75	12	-
Sheet AMS 6345	Normalised	0.187"- 0.250"	90	70	15	-
Sheet AMS 6345	Normalised	0.250"- 0.750"	90	70	16	-
Sheet AMS 6345	Normalised	0.750"- 1.500"	90	70	18	-
Sheet AMS 6345	Normalised & Heat Treated	0.249"- 0.375"	-	-	-	42
Sheet AMS 6345	Normalised & Heat Treated	0.375"- 0.500"	-	-	-	38
Sheet AMS 6345	Normalised & Heat Treated	0.500"- 0.625"	-	-	-	32
Sheet AMS 6345	Normalised & Heat Treated	0.625"- 0.750"	-	-	-	29
Sheet AMS 6345	Normalised & Heat Treated	0.750"- 0.875"	-	-	-	27
Sheet AMS 6345	Normalised & Heat Treated	0.875"- 1.500"	-	-	-	26

Applications

Military & commercial aircraft components
Motorsports & automotive parts
Oil & gas industry components
General‑purpose machine tool parts

Why Source AMS 6345 4130 from ZYTC Alloy

We implement complete material traceability, full‑set MTR documentation and support third‑party inspection. Our inventory and custom processing solutions serve aerospace, defence and heavy‑industry procurement projects worldwide.

Looking for AMS 6345 AISI 4130 sheets, plates or related mill forms? Send your drawings, size requirements and heat‑treatment demands to daisy@zytcsteel.com. Our technical‑sales team will return a competitive quotation within 24 hours.