430 stainless steel Rockwell hardness

430 Stainless Steel Rockwell Hardness

Gangsteel produces 430 stainless steel with consistent Rockwell hardness that fully complies with the leading international standards. We can manufacture to any of the following major specifications to meet your exact project requirements:

• JIS G4305 SUS430(Japan)
• ASTM A240 Type 430(USA)
• EN 10088-2 1.4016 / X6Cr17(Europe)
• DIN EN 1.4016(Germany)
• GB/T 3280 10Cr17 / 1Cr17(China)
• BS 1449 430S17(United Kingdom)
• ISO 4954 X6Cr17(International)

Rockwell Hardness of 430 Stainless Steel

The Rockwell hardness of 430 stainless steel (AISI 430 or UNS S43000) in the standard annealed condition (the normal delivery state for cold-rolled sheet and coil) is:

Maximum Rockwell Hardness: ≤ 89 HRBTypical Range: 80 – 88 HRB

This value is the same across all major standards (ASTM A240, JIS G4305, EN 10088-2, GB/T 3280, etc.) and is measured on the Rockwell B scale using a 1/16" ball indenter and 100 kgf major load (ASTM E18 / ISO 6508).

Full Mechanical Properties Table (Annealed Condition)

Key Notes on Rockwell Hardness

• The annealed condition gives the softest and most formable state (ideal for deep drawing and bending).
• Cold working (temper rolling or skin-passing) can increase hardness to 95–100 HRB or higher, depending on the reduction.
• Compared to austenitic grades like 304 (typically ≤92 HRB annealed), 430 is slightly softer in the annealed condition but offers better thermal conductivity and lower cost due to its nickel-free composition.
• For applications requiring higher hardness, 430 can be supplied in lightly cold-worked tempers or (in special cases) heat-treated conditions.

For full product details on 430 stainless steel sheet or coil with these mechanical properties, please see our:

• a240 Type_430 stainless steel sheet
• EN10088 2 X6Cr17 stainless steel sheet
• DIN 1.4016 stainless steel sheet
• GB/T 10Cr17 1Cr17 stainless steel sheet
• JIS G4305 SUS 430 stainless steel sheet

Gangsteel guarantees every batch meets or exceeds the Rockwell hardness requirements of the chosen standard, with full mill test certificates provided. If you need hardness data for a specific temper, cold-worked condition, or custom testing, contact our technical team for details.