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	PRODUCT DATA of 4130

Material

4130

General Information

AISI 4130 is a low alloy steel containing molybdenum and chromium as strengthening agents

Processing and Assembly

The alloy can be hardened by heat treatment.

Chemical Composition

0.3C-1Cr-0.5Mn-0.2Mo, rem Fe

	EXPERIENCE IN PRACTICE

Equivalent Designations

DIN 1.7218, AFNOR 25 CD 4

	PHYSICAL PROPERTIES

Specific Gravity

7.85

	ELASTIC PROPERTIES

Tensile Modulus

205 GPa

Shear Modulus

50 GPa

Bulk Modulus

140 GPa

Poisson Ratio

0.27 to 0.3

	ELECTRICAL PROPERTIES

Electrical Volume Resistivity

2.23e-7 ohm.m

	THERMAL PROPERTIES

Thermal Conductivity

42.7 W/m.K

Specific Heat

0.477 J/g.K

Melting Range

1430 °C

	RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY

General Corrosion Status

Requires specific corrosion protection

Stress Corrosion Status

High Resistance to SCC: Table 1: UTS below 125 kg/mm2 A small number of laboratory failures of specimens cut from plate more than 2 inches thick have been observed at 75% yield, even within this ultimate strength range. The use of thick plate should therefore be avoided in a corrosive environment when sustained tensile stress in the short transverse direction is expected. Moderate Resistance to SCC: Table 2: UTS 125 to 140 kg/mm2 UTS Remark: Requires Stress corrosion evaluation form Low Resistance to SCC: Table 3: UTS above 140 kg/mm2 UTS Remark: Not for primary structural items Remark: Requires Stress corrosion evaluation form Remark: acc. to ECSS-Q-ST-70-36C Data Quality: Design Data

Machinability

This alloy is readily machined by conventional methods. Machinability is best with the alloy in the normalized and tempered condition.