| Customization: | Available |
|---|---|
| Type: | Stainless Steel Bars |
| Standard: | ASTM, AISI, GB, JIS, DIN, EN |
Suppliers with verified business licenses
Audited Supplier Audited by an independent third-party inspection agency
Lork Group specializes in the supply of AM-350 Bar raw materials and processing, alloys, stainless steel, metal quality development, welcome your inquiries
300M Consumable Electrode Vacuum Remelted Steel is 4340 Alloy Steel modified with the addition of Vanadium and higher Silicon. Carbon Content in AMS 6417 Carbon content is 0.37% to 0.43". Specifications AMS 6419 requires 0.40" - 0.45% C and AMS 6256 0.40% - 0.44%C. Service Steel Aerospace stocks material with restricted carbon content to certify chemistry to these various specifications.
These chemistry modifications provide an Alloy Steel with very good fatigue strength, ductility, impact strength and fracture toughness. 300M is widely used for Aircraft Landing Gear.
Stainless Steel 300M (4340 Mod) Applications
This grade is used high strength structural applications with sections 3.5" in and under in cross-section thickness for through-hardness requiring minimum Rockwell C hardness 52 HRC that are subject to exacting magnetic particle inspection standards. Applications include:
| Symbol | Element | Min % | Max % |
| C | Carbon | 0.38% | 0.43% |
| Mn | Manganese | 0.65%% | 0.90% |
| Si | Silicon | 1.45% | 1.80% |
| P | Phosphorus | 0.010% | |
| S | Sulfur | 0.008% | |
| Cr | Chromium | 0.70% | 0.95% |
| Ni | Nickel | 1.65% | 2.00% |
| Mo | Molybdenum | 0.30% | 0.50% |
| V | Vanadium | 0.05% | 0.10% |
| Cu | Copper | 0.35% |
| Property | Value |
| Tensile Strength | 270 ksi |
| Yield Strength 0.2% offset | 220 ksi |
| Elongation | 8% |
| Reduction of Area | 30% |
| Type of Heat Treating | Process |
| Normalize | 1700° F +/- 25° F (927° C +/- 14° C), then air cool |
| Harden | 1600° F +/- 25° F (871° C +/- 14°C), quench in oil |
| Temper | Double temper 400° - 1200° F (204° - 649° C) depending on desired strength and hardness. |
| 300M stainless steel profile sizes and specifications | |
| Grade | 300M (4043MOD) |
| Specification | EN, DIN, JIS, ASTM, BS, ASME, AISI, ISO |
| Standard | ASTM A276/ASME SA276, ASTM A479/ASME SA479 & ASTM A164/ASME SA164 ASTM-A167 ASTM-A240 ASTM-A480. |
| Stainless steel round Bar | Diameter: 2mm - 600mm |
| Stainless steel bright Bar | Diameter: 2mm - 600mm |
| Stainless steel hex Bar | Dimension: 6mm - 80mm |
| Stainless steel square bar | Dimension: 3.0 - 180mm |
| Stainless steel flat bar | Thickness: 0.5mm - 200mm, Width: 1.5mm - 250 mm |
| Stainless steel angle bar | as requirements |
| Length | Normally 6m, or produce as requirements |
| Surface | Black, Bright. Peeled and Polished, Solution annealed. |
| Delivery condition | cold drawn, hot rolled, forged, grinding, centerless grinding |
| Tolerance | H8, H9, H10, H11, H12, H13,K9, K10, K11, K12 or as per clients' requirements |
Q1: Do you accept the trial order ?
A1: Yes,if we have the exactly size in stock.we can delivery even 1 piece/meter .
Q2: Can I have free sample before making orders?
){kind=link}